Union, IA Weather Forecast & Current Conditions

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Union Weather Map
UTC Time: 9/14/2026, 12:23
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Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Union, IA Regional Weather

Expires:202609141300;;436156
ASUS43 KDMX 141210
RWRIA 

WEATHER ROUNDUP FOR IOWA
NATIONAL WEATHER SERVICE DES MOINES IA
700 AM CDT MON SEP 14 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* - THESE STATIONS ARE NOT NWS STATIONS...THUS NOT UNDER NWS
QUALITY CONTROL.  THEY ALSO DO NOT REPORT WEATHER SUCH 
AS PRECIPITATION OR FOG.  


IAZ007>011-017>019-026>030-037>042-050>054-066-141300-
   NORTHEAST IOWA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CEDAR RAPIDS   CLOUDY    57  54  89 E6        30.20R TC  14           
6HR MIN TEMP:  54; 6HR MAX TEMP:  57;                                

CHARLES CITY * CLOUDY    55  54  94 SE9       30.18S TC  13           
CLINTON *      MOCLDY    53  53 100 E8        30.22F TC  12           
DECORAH *      CLOUDY    54  52  94 VRB6G12   30.20R TC  12           
DUBUQUE        PTCLDY    55  50  83 E10       30.21F TC  13           
6HR MIN TEMP:  48; 6HR MAX TEMP:  55;                                

MONTICELLO *   PTCLDY    54  54 100 E5        30.20R TC  12           
OELWEIN *      MOCLDY    55  54  94 SE7       30.20R TC  13           
WATERLOO       CLOUDY    57  53  86 SE7       30.18R TC  14           
6HR MIN TEMP:  51; 6HR MAX TEMP:  57;                                

$$
 

SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

Union, IA

Today
Thunderstorms
72°/ 65° 22°/ 18°
100%
Tuesday
Rain Showers
72°/ 55° 22°/ 13°
50%
Wednesday
Thunderstorms
68°/ 60° 20°/ 16°
90%
Thursday
Rain Showers
75°/ 62° 24°/ 17°
60%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
80%
Saturday
Thunderstorms
75°/ 58° 24°/ 14°
50%

Day: Mostly cloudy with showers likely with a slight chance of thunderstorms this morning, then partly sunny with a chance of showers and thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall. Breezy with highs in the lower 70s. Southeast winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 70 percent.

Night: Thunderstorms likely. Showers. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. More humid with lows in the mid 60s. South winds 15 to 20 mph with gusts up to 30 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Marshalltown, IA

Today
Thunderstorms
75°/ 65° 24°/ 18°
100%
Tuesday
Thunderstorms
75°/ 55° 24°/ 13°
70%
Wednesday
Thunderstorms
72°/ 62° 22°/ 17°
90%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%

Day: Becoming partly sunny this afternoon. A slight chance of thunderstorms. Showers likely, mainly this morning. Some thunderstorms may produce heavy rainfall. Highs in the mid 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.

Night: Showers with thunderstorms likely. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible. More humid with lows in the mid 60s. South winds 15 to 20 mph with gusts up to 30 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Grundy Center, IA

Today
Thunderstorms
72°/ 65° 22°/ 18°
100%
Tuesday
Rain Showers
72°/ 55° 22°/ 13°
50%
Wednesday
Thunderstorms
68°/ 60° 20°/ 16°
90%
Thursday
Rain Showers
75°/ 62° 24°/ 17°
50%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
80%
Saturday
Thunderstorms
75°/ 58° 24°/ 14°
50%

Day: Showers likely with a slight chance of thunderstorms this morning, then partly sunny with a chance of showers and thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall. Breezy with highs in the lower 70s. Southeast winds 15 to 25 mph. Chance of rain 70 percent.

Night: Thunderstorms likely. Showers. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. Breezy and more humid with lows in the mid 60s. South winds 20 to 25 mph, becoming southwest 15 to 20 mph after midnight. Chance of rain near 100 percent.

Ames, IA

Today
Thunderstorms
75°/ 65° 24°/ 18°
100%
Tuesday
Thunderstorms
72°/ 58° 22°/ 14°
50%
Wednesday
Thunderstorms
70°/ 62° 21°/ 17°
90%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
60%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
80%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
50%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of thunderstorms. Showers likely, mainly this morning. Some thunderstorms may produce heavy rainfall. Highs in the mid 70s. Southeast winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 70 percent.

Night: Showers with thunderstorms likely. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible. More humid with lows in the mid 60s. South winds 15 to 20 mph with gusts up to 30 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Tama, IA

Today
Thunderstorms
75°/ 65° 24°/ 18°
100%
Tuesday
Thunderstorms
75°/ 55° 24°/ 13°
50%
Wednesday
Thunderstorms
70°/ 62° 21°/ 17°
90%
Thursday
Rain Showers
78°/ 62° 26°/ 17°
50%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%

Day: Showers likely with a slight chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Highs in the mid 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.

Night: A chance of thunderstorms. A chance of showers in the evening, then showers after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible after midnight. More humid with lows in the mid 60s. South winds 15 to 20 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Parkersburg, IA

Today
Thunderstorms
70°/ 62° 21°/ 17°
100%
Tuesday
Rain Showers
72°/ 52° 22°/ 11°
40%
Wednesday
Thunderstorms
65°/ 58° 18°/ 14°
80%
Thursday
Rain Showers
75°/ 58° 24°/ 14°
50%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
80%
Saturday
Thunderstorms
75°/ 55° 24°/ 13°
50%

Day: Showers likely with a slight chance of thunderstorms this morning, then showers with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall this morning. Some thunderstorms may produce heavy rainfall this afternoon. Breezy with highs around 70. Southeast winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 80 percent.

Night: Thunderstorms likely. Showers. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. Breezy and more humid with lows in the lower 60s. South winds 15 to 25 mph with gusts up to 35 mph, becoming southwest 10 to 15 mph with gusts up to 25 mph after midnight. Chance of rain near 100 percent.

Hampton, IA

Today
Thunderstorms
72°/ 62° 22°/ 17°
100%
Tuesday
Rain Showers
72°/ 52° 22°/ 11°
20%
Wednesday
Thunderstorms
65°/ 58° 18°/ 14°
80%
Thursday
Rain Showers
75°/ 58° 24°/ 14°
60%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
80%
Saturday
Thunderstorms
72°/ 55° 22°/ 13°
50%

Day: Showers with a slight chance of thunderstorms this morning, then showers likely with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall this morning. Some thunderstorms may produce heavy rainfall this afternoon. Breezy with highs in the lower 70s. Southeast winds 15 to 25 mph. Gusts up to 40 mph this afternoon. Chance of rain 80 percent.

Night: Showers with thunderstorms likely in the evening, then showers likely with a chance of thunderstorms after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. Breezy and more humid with lows in the lower 60s. South winds 15 to 25 mph with gusts up to 35 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Webster City, IA

Today
Thunderstorms
75°/ 62° 24°/ 17°
100%
Tuesday
Rain Showers
72°/ 55° 22°/ 13°
50%
Wednesday
Thunderstorms
68°/ 58° 20°/ 14°
90%
Thursday
Rain Showers
75°/ 62° 24°/ 17°
60%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
80%
Saturday
Thunderstorms
75°/ 58° 24°/ 14°
50%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of thunderstorms. Showers, mainly this morning. Some thunderstorms may produce heavy rainfall. Breezy with highs in the mid 70s. Southeast winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 80 percent.

Night: Showers with thunderstorms likely in the evening, then showers likely with a chance of thunderstorms after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. Breezy and more humid with lows in the lower 60s. South winds 15 to 25 mph with gusts up to 35 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Newton, IA

Today
Thunderstorms
78°/ 65° 26°/ 18°
100%
Tuesday
Thunderstorms
75°/ 58° 24°/ 14°
90%
Wednesday
Thunderstorms
72°/ 65° 22°/ 18°
100%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
60%
Friday
Thunderstorms
80°/ 65° 27°/ 18°
70%
Saturday
Thunderstorms
78°/ 60° 26°/ 16°
70%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of showers with a slight chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Highs in the upper 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.

Night: A chance of showers and thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. Some thunderstorms may produce heavy rainfall in the evening. Locally heavy rainfall possible after midnight. More humid with lows in the mid 60s. South winds 15 to 20 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Waterloo, IA

Today
Thunderstorms
70°/ 68° 21°/ 20°
100%
Tuesday
Rain Showers
72°/ 55° 22°/ 13°
50%
Wednesday
Thunderstorms
68°/ 60° 20°/ 16°
90%
Thursday
Rain Showers
75°/ 62° 24°/ 17°
50%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
80%
Saturday
Thunderstorms
75°/ 58° 24°/ 14°
70%

Day: Partly sunny. A chance of showers this morning, then showers likely with a slight chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall this afternoon. Breezy with highs around 70. Southeast winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 70 percent.

Night: Thunderstorms likely. Showers. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. Not as cool and more humid. Near steady temperature in the upper 60s. Southeast winds around 20 mph with gusts up to 35 mph, becoming southwest after midnight. Chance of rain near 100 percent.

Des Moines, IA

Today
Thunderstorms
78°/ 65° 26°/ 18°
90%
Tuesday
Thunderstorms
72°/ 58° 22°/ 14°
90%
Wednesday
Thunderstorms
72°/ 65° 22°/ 18°
90%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
60%
Friday
Thunderstorms
80°/ 65° 27°/ 18°
70%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
50%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of thunderstorms. Showers likely, mainly this morning. Some thunderstorms may produce heavy rainfall. Not as cool with highs in the upper 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.

Night: A chance of thunderstorms. Showers. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible. More humid with lows in the mid 60s. South winds 15 to 20 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain 90 percent.

Eagle Grove, IA

Today
Thunderstorms
72°/ 62° 22°/ 17°
100%
Tuesday
Rain Showers
72°/ 52° 22°/ 11°
20%
Wednesday
Thunderstorms
65°/ 58° 18°/ 14°
80%
Thursday
Rain Showers
75°/ 58° 24°/ 14°
60%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
80%
Saturday
Thunderstorms
72°/ 55° 22°/ 13°
50%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of thunderstorms. Showers, mainly this morning. Some thunderstorms may produce heavy rainfall. Breezy with highs in the lower 70s. Southeast winds 20 to 25 mph with gusts up to 40 mph. Chance of rain 80 percent.

Night: Showers with thunderstorms likely in the evening, then a chance of showers and thunderstorms after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. Breezy and more humid with lows in the lower 60s. South winds 15 to 25 mph with gusts up to 35 mph, becoming west 10 to 15 mph after midnight. Chance of rain near 100 percent.

Grinnell, IA

Today
Thunderstorms
75°/ 65° 24°/ 18°
100%
Tuesday
Thunderstorms
75°/ 58° 24°/ 14°
90%
Wednesday
Thunderstorms
72°/ 62° 22°/ 17°
100%
Thursday
Rain Showers
78°/ 62° 26°/ 17°
60%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of showers with a slight chance of thunderstorms. Highs in the mid 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.

Night: A chance of thunderstorms. A chance of showers in the evening, then showers after midnight. Locally heavy rainfall possible after midnight. More humid with lows in the mid 60s. Southeast winds 15 to 20 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Boone, IA

Today
Thunderstorms
78°/ 65° 26°/ 18°
100%
Tuesday
Rain Showers
72°/ 58° 22°/ 14°
50%
Wednesday
Thunderstorms
68°/ 62° 20°/ 17°
90%
Thursday
Rain Showers
78°/ 62° 26°/ 17°
60%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
80%
Saturday
Thunderstorms
75°/ 58° 24°/ 14°
50%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of thunderstorms. Showers, mainly this morning. Some thunderstorms may produce heavy rainfall. Highs in the upper 70s. Southeast winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 80 percent.

Night: Thunderstorms likely. Showers, mainly in the evening. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. More humid with lows in the mid 60s. South winds 15 to 20 mph with gusts up to 35 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Waverly, IA

Today
Thunderstorms
68°/ 68° 20°/ 20°
100%
Tuesday
Rain Showers
72°/ 52° 22°/ 11°
50%
Wednesday
Thunderstorms
65°/ 58° 18°/ 14°
80%
Thursday
Rain Showers
72°/ 60° 22°/ 16°
50%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
80%
Saturday
Thunderstorms
72°/ 55° 22°/ 13°
60%

Day: Partly sunny with a chance of showers this morning, then showers likely with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall this afternoon. Breezy with highs in the upper 60s. Southeast winds 15 to 25 mph. Gusts up to 40 mph this afternoon. Chance of rain 70 percent.

Night: Thunderstorms likely. Showers. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. Breezy and not as cool. More humid. Near steady temperature in the upper 60s. South winds 20 to 25 mph, becoming southwest 15 to 20 mph after midnight. Chance of rain near 100 percent.

Mason City, IA

Today
Thunderstorms
68°/ 60° 20°/ 16°
100%
Tuesday
Mostly Cloudy
70°/ 50° 21°/ 10°
0%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
70%
Thursday
Rain Showers
72°/ 58° 22°/ 14°
60%
Friday
Thunderstorms
75°/ 60° 24°/ 16°
80%
Saturday
Thunderstorms
72°/ 55° 22°/ 13°
50%

Day: Showers with a slight chance of thunderstorms this morning, then showers with a chance of thunderstorms this afternoon. Breezy with highs in the upper 60s. Southeast winds 15 to 25 mph with gusts up to 40 mph. Chance of rain 80 percent.

Night: Showers with thunderstorms likely in the evening, then a chance of showers and thunderstorms after midnight. More humid with lows around 60. South winds 15 to 20 mph with gusts up to 35 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Fort Dodge, IA

Today
Thunderstorms
75°/ 62° 24°/ 17°
100%
Tuesday
Rain Showers
72°/ 55° 22°/ 13°
40%
Wednesday
Thunderstorms
68°/ 58° 20°/ 14°
90%
Thursday
Rain Showers
75°/ 62° 24°/ 17°
70%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
80%
Saturday
Thunderstorms
75°/ 55° 24°/ 13°
50%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of thunderstorms. Showers, mainly this morning. Some thunderstorms may produce heavy rainfall. Breezy with highs in the mid 70s. Southeast winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 80 percent.

Night: Showers with thunderstorms likely in the evening, then showers likely with a chance of thunderstorms after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the evening. Humid with lows in the lower 60s. South winds 15 to 20 mph with gusts up to 35 mph, becoming west 5 to 10 mph after midnight. Chance of rain near 100 percent.

Perry, IA

Today
Thunderstorms
78°/ 65° 26°/ 18°
100%
Tuesday
Thunderstorms
72°/ 58° 22°/ 14°
70%
Wednesday
Thunderstorms
72°/ 62° 22°/ 17°
90%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
60%
Friday
Thunderstorms
80°/ 65° 27°/ 18°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
50%

Day: Mostly cloudy this morning, then becoming partly sunny. A chance of thunderstorms. Showers, mainly this morning. Some thunderstorms may produce heavy rainfall. Not as cool with highs in the upper 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 80 percent.

Night: Showers with a chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible. Humid with lows in the mid 60s. South winds 15 to 20 mph, becoming west 10 to 15 mph after midnight. Chance of rain near 100 percent.

Oskaloosa, IA

Today
Thunderstorms
78°/ 68° 26°/ 20°
100%
Tuesday
Thunderstorms
75°/ 60° 24°/ 16°
90%
Wednesday
Thunderstorms
75°/ 65° 24°/ 18°
100%
Thursday
Rain Showers
80°/ 65° 27°/ 18°
60%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
60%

Day: Mostly cloudy this morning, then becoming partly sunny. A slight chance of thunderstorms. A chance of showers, mainly this morning. Highs in the upper 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.

Night: Partly cloudy in the evening. A chance of thunderstorms. A chance of showers in the evening, then showers after midnight. Locally heavy rainfall possible after midnight. More humid with lows in the upper 60s. Southeast winds 15 to 20 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

Pella, IA

Today
Thunderstorms
82°/ 68° 28°/ 20°
100%
Tuesday
Thunderstorms
70°/ 62° 21°/ 17°
100%
Wednesday
Thunderstorms
75°/ 65° 24°/ 18°
100%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
60%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
60%

Day: Mostly cloudy this morning, then becoming mostly sunny. A slight chance of thunderstorms. Showers likely, mainly this morning. Not as cool with highs in the lower 80s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 60 percent.

Night: A chance of thunderstorms. A chance of showers in the evening, then showers after midnight. Locally heavy rainfall possible. More humid with lows in the upper 60s. South winds 15 to 20 mph, becoming southwest 10 to 15 mph after midnight. Chance of rain near 100 percent.

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