Johnston, IA Weather Forecast & Current Conditions

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Johnston Weather Map
UTC Time: 9/16/2026, 06:09
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Johnston, IA Regional Weather

Expires:202609160700;;528664
ASUS43 KDMX 160606
RWRIA 

WEATHER ROUNDUP FOR IOWA
NATIONAL WEATHER SERVICE DES MOINES IA
100 AM CDT WED SEP 16 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.  


IAZ047>049-059>061-072>074-084-160700-
   CENTRAL IOWA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
AMES           PTCLDY    59  54  83 NE5       30.24R TC  15           
6HR MIN TEMP:  57; 6HR MAX TEMP:  65;                                

ANKENY *       CLOUDY    61  59  94 CALM      30.25R TC  16           
BOONE *        PTCLDY    57  55  94 NE5       30.23R TC  14           
CHARITON *     CLOUDY    63  63 100 CALM      30.21S TC  17           
DES MOINES     CLOUDY    63  57  81 NE6       30.24R TC  17           
6HR MIN TEMP:  62; 6HR MAX TEMP:  64;                                

GRINNELL*      MOCLDY    60  56  88 NE6       30.25R TC  16           
KNOXVILLE *    CLOUDY    63  59  88 NE6       30.22R TC  17           
MARSHALLTOWN   CLOUDY    58  55  90 NE6       30.24R TC  14           
6HR MIN TEMP:  56; 6HR MAX TEMP:  65;                                

NEWTON *       MOCLDY    61  61 100 E3        30.23R TC  16           
PELLA *        CLOUDY    61  60  95 CALM      30.23S TC  16           
PERRY *        FOG       56  56 100 N3        30.23R VSB 1   TC  14   
$$
 

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

Johnston, IA

Tonight
Thunderstorms
60°16°
30%
Wednesday
Thunderstorms
68°/ 65° 20°/ 18°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
80%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
50%
Sunday
Rain Showers
72°/ 60° 22°/ 16°
50%
Monday
Rain Showers
68°/ 58° 20°/ 14°
20%
Tuesday
Rain Showers
70°21°
20%

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Lows around 60. Northeast winds around 5 mph. Chance of rain 30 percent.

Perry, IA

Tonight
Thunderstorms
58°14°
20%
Wednesday
Thunderstorms
68°/ 65° 20°/ 18°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
80%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
50%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
72°22°
20%

Night: Mostly cloudy. A slight chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Lows in the upper 50s. Northeast winds around 5 mph. Chance of rain 20 percent.

Indianola, IA

Tonight
Thunderstorms
62°17°
50%
Wednesday
Thunderstorms
70°/ 65° 21°/ 18°
70%
Thursday
Thunderstorms
80°/ 68° 27°/ 20°
50%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
80%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Sunday
Rain Showers
72°/ 60° 22°/ 16°
50%
Monday
Rain Showers
68°/ 58° 20°/ 14°
20%
Tuesday
Rain Showers
70°21°
20%

Night: Cloudy. A slight chance of showers and thunderstorms late this evening, then a chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall late this evening. Some thunderstorms may produce heavy rainfall. Near steady temperature in the lower 60s. Northeast winds around 5 mph. Chance of rain 50 percent.

Ames, IA

Tonight
Mostly Cloudy
58°14°
0%
Wednesday
Thunderstorms
68°/ 62° 20°/ 17°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
80%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
50%
Sunday
Rain Showers
70°/ 58° 21°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
70°21°
20%

Night: Mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph.

Boone, IA

Tonight
Mostly Cloudy
58°14°
0%
Wednesday
Rain Showers
68°/ 62° 20°/ 17°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Sunday
Rain Showers
70°/ 58° 21°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
70°21°
20%

Night: Mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph.

Newton, IA

Tonight
Thunderstorms
58°14°
40%
Wednesday
Thunderstorms
70°/ 65° 21°/ 18°
50%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
80%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
50%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
70°/ 58° 21°/ 14°
20%
Tuesday
Rain Showers
72°22°
20%

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Lows in the upper 50s. Northeast winds around 5 mph. Chance of rain 40 percent.

Winterset, IA

Tonight
Thunderstorms
62°17°
50%
Wednesday
Thunderstorms
70°/ 65° 21°/ 18°
70%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
80%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
68°/ 58° 20°/ 14°
20%
Tuesday
Rain Showers
70°21°
20%

Night: Cloudy. A slight chance of showers and thunderstorms late this evening, then a chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall late this evening. Some thunderstorms may produce heavy rainfall. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Pella, IA

Tonight
Thunderstorms
62°17°
50%
Wednesday
Thunderstorms
70°/ 65° 21°/ 18°
70%
Thursday
Thunderstorms
80°/ 68° 27°/ 20°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
70%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Sunday
Rain Showers
72°/ 60° 22°/ 16°
60%
Monday
Rain Showers
68°/ 58° 20°/ 14°
20%
Tuesday
Rain Showers
72°22°
20%

Night: Cloudy. A slight chance of showers and thunderstorms late this evening, then a chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Lows in the lower 60s. Northeast winds around 5 mph. Chance of rain 50 percent.

Jefferson, IA

Tonight
Mostly Cloudy
58°14°
0%
Wednesday
Rain Showers
70°/ 62° 21°/ 17°
50%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Sunday
Rain Showers
70°/ 55° 21°/ 13°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
72°22°
20%

Night: Mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph.

Marshalltown, IA

Tonight
Mostly Cloudy
58°14°
0%
Wednesday
Thunderstorms
68°/ 62° 20°/ 17°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
80%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
50%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
70°21°
20%

Night: Mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph.

Guthrie Center, IA

Tonight
Thunderstorms
58°14°
20%
Wednesday
Thunderstorms
70°/ 62° 21°/ 17°
50%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
50%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
70°/ 55° 21°/ 13°
20%
Tuesday
Rain Showers
72°22°
20%

Night: Mostly cloudy. A slight chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Near steady temperature in the upper 50s. Northeast winds around 5 mph. Chance of rain 20 percent.

Greenfield, IA

Tonight
Thunderstorms
60°16°
50%
Wednesday
Thunderstorms
70°/ 65° 21°/ 18°
50%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
50%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
70°21°
20%

Night: Mostly cloudy. A slight chance of showers and thunderstorms late this evening, then a chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall late this evening. Some thunderstorms may produce heavy rainfall. Near steady temperature around 60. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Osceola, IA

Tonight
Thunderstorms
60°16°
50%
Wednesday
Thunderstorms
72°/ 68° 22°/ 20°
70%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
70%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
68°/ 58° 20°/ 14°
20%
Tuesday
Rain Showers
68°20°
20%

Night: Cloudy with a chance of thunderstorms. A chance of showers. Some thunderstorms may produce heavy rainfall. Lows around 60. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Webster City, IA

Tonight
Mostly Cloudy
58°14°
0%
Wednesday
Rain Showers
68°/ 62° 20°/ 17°
30%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
60%
Friday
Thunderstorms
80°/ 65° 27°/ 18°
80%
Saturday
Thunderstorms
75°/ 62° 24°/ 17°
50%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Tuesday
Rain Showers
68°20°
20%

Night: Mostly cloudy. Near steady temperature in the upper 50s. Northeast winds around 5 mph.

Chariton, IA

Tonight
Thunderstorms
62°17°
50%
Wednesday
Thunderstorms
72°/ 65° 22°/ 18°
70%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
70%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
60%
Monday
Rain Showers
68°/ 58° 20°/ 14°
20%
Tuesday
Rain Showers
68°20°
20%

Night: Cloudy with a chance of thunderstorms. A chance of showers. Some thunderstorms may produce heavy rainfall. Lows in the lower 60s. Northeast winds around 5 mph. Chance of rain 50 percent.

Iowa Falls, IA

Tonight
Mostly Cloudy
55°13°
0%
Wednesday
Rain Showers
68°/ 62° 20°/ 17°
20%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
60%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
80%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Sunday
Rain Showers
70°/ 55° 21°/ 13°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
68°20°
20%

Night: Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph.

Creston, IA

Tonight
Thunderstorms
62°17°
60%
Wednesday
Thunderstorms
72°/ 65° 22°/ 18°
70%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
60%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
68°20°
20%

Night: Cloudy with a chance of thunderstorms. A chance of showers late this evening, then showers likely. Some thunderstorms may produce heavy rainfall. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 60 percent.

Fort Dodge, IA

Tonight
Mostly Cloudy
55°13°
0%
Wednesday
Rain Showers
70°/ 62° 21°/ 17°
20%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
60%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Saturday
Rain Showers
75°/ 60° 24°/ 16°
40%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
40%
Monday
Rain Showers
68°/ 52° 20°/ 11°
20%
Tuesday
Rain Showers
68°20°
20%

Night: Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph.

Grinnell, IA

Tonight
Thunderstorms
58°14°
20%
Wednesday
Thunderstorms
68°/ 62° 20°/ 17°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
50%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
20%
Tuesday
Rain Showers
70°21°
20%

Night: Cloudy with a slight chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Lows in the upper 50s. Northeast winds around 5 mph. Chance of rain 20 percent.

Oskaloosa, IA

Tonight
Thunderstorms
62°17°
50%
Wednesday
Thunderstorms
72°/ 65° 22°/ 18°
70%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
70%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
60%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
60%
Monday
Rain Showers
70°/ 58° 21°/ 14°
30%
Tuesday
Rain Showers
72°22°
20%

Night: Cloudy with a chance of showers and thunderstorms. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

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