Johnston, IA Weather Forecast & Current Conditions

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Johnston Weather Map
UTC Time: 9/18/2026, 18:19
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Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Johnston, IA Regional Weather

Expires:202609181900;;666369
ASUS43 KEAX 181815
RWREAX

WEATHER ROUNDUP FOR EASTERN KANSAS AND NORTHWEST MISSOURI
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
100 PM CDT FRI SEP 18 2026


IAZ060-094-KSZ022-034>040-054-083-096-NEZ052-066-093-181900- 
...KANSAS...SOUTHEAST NEBRASKA AND IOWA...
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
TOPEKA         SUNNY     94  69  44 SW13G21   30.06F HX  99           
6HR MIN TEMP:  72; 6HR MAX TEMP:  94;                                

MANHATTAN      PTSUNNY   94  69  44 SW14      30.04F HX  99           
EMPORIA        MOSUNNY   92  67  43 SW13G24   30.09F HX  95           
OTTAWA         SUNNY     97  72  44 S13       30.07F HAZE    HX 105   
CHANUTE        SUNNY     93  70  46 S9        30.12F HX  99           
SALINA         MOSUNNY   98  64  32 SW23G31   30.04F HX 100           
WICHITA        PTSUNNY   91  66  43 SW16G24   30.08F HX  93           
OMAHA          MOSUNNY   90  73  57 S14       29.99F HX  98           
LINCOLN        MOSUNNY   93  69  45 S18G30    29.99F HX  98           
FALLS CITY     MOSUNNY   94  69  44 S13G24    30.03F HX  99           
LAMONI         SUNNY     84  74  71 SE8       30.10F HX  91           
DES MOINES     CLOUDY    69  67  93 SE16      30.11F FOG              

$$

  

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

Today
Mostly Cloudy
80°/ 70° 27°/ 21°
70%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Thunderstorms
65°/ 58° 18°/ 14°
70%
Monday
Rain Showers
58°/ 52° 14°/ 11°
70%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
20%
Thursday
Rain Showers
68°20°
20%

Day: Patchy fog late this morning. Mostly cloudy. Highs around 80. Southeast winds around 10 mph with gusts up to 20 mph.

Night: Partly cloudy in the evening, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows around 70. Southeast winds 5 to 10 mph. Chance of rain 70 percent.

Perry, IA

Today
Mostly Cloudy
82°/ 68° 28°/ 20°
70%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Thunderstorms
65°/ 55° 18°/ 13°
70%
Monday
Rain Showers
58°/ 52° 14°/ 11°
70%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
20%
Thursday
Rain Showers
68°20°
20%

Day: Patchy fog late this morning. Mostly cloudy. Highs in the lower 80s. Southeast winds around 10 mph with gusts up to 25 mph.

Night: Partly cloudy in the evening, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the upper 60s. South winds 5 to 10 mph. Chance of rain 70 percent.

Indianola, IA

Today
Mostly Cloudy
82°/ 70° 28°/ 21°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
90%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
70%
Monday
Rain Showers
58°/ 52° 14°/ 11°
70%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%
Thursday
Rain Showers
68°20°
20%

Day: Mostly cloudy late this morning, then becoming partly sunny. Patchy fog late this morning. Highs in the lower 80s. Southeast winds around 10 mph with gusts up to 20 mph.

Night: Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds 5 to 10 mph. Chance of rain 50 percent.

Ames, IA

Today
Mostly Cloudy
78°/ 68° 26°/ 20°
70%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
70%
Sunday
Thunderstorms
65°/ 55° 18°/ 13°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
20%
Thursday
Partly Cloudy
68°20°
0%

Day: Mostly cloudy. Highs in the upper 70s. Southeast winds around 10 mph with gusts up to 25 mph.

Night: Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the upper 60s. Southeast winds 5 to 10 mph. Chance of rain 70 percent.

Boone, IA

Today
Mostly Cloudy
78°/ 68° 26°/ 20°
70%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
70%
Sunday
Thunderstorms
65°/ 55° 18°/ 13°
70%
Monday
Rain Showers
58°/ 50° 14°/ 10°
60%
Tuesday
Mostly Cloudy
62°/ 45° 17°/
0%
Wednesday
Partly Cloudy
62°/ 50° 17°/ 10°
20%
Thursday
Rain Showers
68°20°
20%

Day: Patchy fog late this morning. Mostly cloudy. Highs in the upper 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph.

Night: A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the upper 60s. South winds 5 to 10 mph. Chance of rain 70 percent.

Newton, IA

Today
Mostly Cloudy
78°/ 68° 26°/ 20°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
90%
Sunday
Thunderstorms
65°/ 55° 18°/ 13°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
70%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Sunny
65°/ 52° 18°/ 11°
0%
Thursday
Partly Cloudy
68°20°
0%

Day: Patchy fog late this morning. Mostly cloudy. Highs in the upper 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph.

Night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Southeast winds 5 to 10 mph. Chance of rain 50 percent.

Winterset, IA

Today
Partly Cloudy
85°/ 70° 29°/ 21°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
90%
Sunday
Thunderstorms
65°/ 58° 18°/ 14°
70%
Monday
Rain Showers
58°/ 52° 14°/ 11°
70%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
62°/ 52° 17°/ 11°
20%
Thursday
Rain Showers
68°20°
20%

Day: Patchy fog late this morning. Partly sunny. Highs in the mid 80s. Southeast winds around 10 mph with gusts up to 20 mph.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds 5 to 10 mph. Chance of rain 50 percent.

Pella, IA

Today
Mostly Cloudy
82°/ 70° 28°/ 21°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
90%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
90%
Monday
Rain Showers
60°/ 52° 16°/ 11°
70%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%
Thursday
Partly Cloudy
68°20°
0%

Day: Mostly cloudy late this morning, then becoming partly sunny. Patchy fog late this morning. Highs in the lower 80s. Southeast winds around 10 mph with gusts up to 20 mph.

Night: Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. Southeast winds 5 to 10 mph. Chance of rain 50 percent.

Jefferson, IA

Today
Mostly Cloudy
82°/ 65° 28°/ 18°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Thunderstorms
68°/ 52° 20°/ 11°
70%
Monday
Rain Showers
62°/ 48° 17°/
60%
Tuesday
Mostly Cloudy
62°/ 45° 17°/
0%
Wednesday
Partly Cloudy
65°/ 50° 18°/ 10°
20%
Thursday
Rain Showers
68°20°
20%

Day: Mostly cloudy. Patchy fog. Highs in the lower 80s. Southeast winds 10 to 15 mph with gusts up to 25 mph.

Night: Showers and thunderstorms likely in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. Southeast winds 5 to 10 mph with gusts up to 20 mph, becoming south after midnight. Chance of rain 70 percent.

Marshalltown, IA

Today
Mostly Cloudy
75°/ 68° 24°/ 20°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
70%
Sunday
Thunderstorms
65°/ 55° 18°/ 13°
70%
Monday
Rain Showers
62°/ 50° 17°/ 10°
70%
Tuesday
Mostly Cloudy
62°/ 45° 17°/
0%
Wednesday
Sunny
65°/ 48° 18°/
0%
Thursday
Partly Cloudy
68°20°
0%

Day: Mostly cloudy. Highs in the mid 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph.

Night: Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the upper 60s. Southeast winds 5 to 10 mph. Chance of rain 70 percent.

Guthrie Center, IA

Today
Mostly Cloudy
85°/ 68° 29°/ 20°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
50%
Sunday
Thunderstorms
68°/ 55° 20°/ 13°
70%
Monday
Rain Showers
62°/ 50° 17°/ 10°
60%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 50° 18°/ 10°
20%
Thursday
Rain Showers
68°20°
20%

Day: Mostly cloudy late this morning, then becoming partly sunny. Patchy fog late this morning. Highs in the mid 80s. Southeast winds around 10 mph with gusts up to 25 mph.

Night: Partly cloudy in the evening, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the upper 60s. South winds 5 to 10 mph. Chance of rain 70 percent.

Greenfield, IA

Today
Partly Cloudy
85°/ 70° 29°/ 21°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
60%
Monday
Rain Showers
58°/ 52° 14°/ 11°
50%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
62°/ 52° 17°/ 11°
20%
Thursday
Rain Showers
68°20°
20%

Day: Patchy fog late this morning. Partly sunny. Highs in the mid 80s. Southeast winds around 10 mph with gusts up to 20 mph.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent.

Osceola, IA

Today
Partly Cloudy
85°/ 70° 29°/ 21°
40%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
90%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
70%
Monday
Rain Showers
58°/ 52° 14°/ 11°
70%
Tuesday
Mostly Cloudy
60°/ 48° 16°/
0%
Wednesday
Partly Cloudy
62°/ 52° 17°/ 11°
20%
Thursday
Rain Showers
68°20°
20%

Day: Patchy fog late this morning. Partly sunny. Highs in the mid 80s. Southeast winds around 10 mph with gusts up to 20 mph.

Night: Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds 5 to 10 mph. Chance of rain 40 percent.

Webster City, IA

Today
Cloudy
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Thunderstorms
65°/ 52° 18°/ 11°
60%
Monday
Rain Showers
58°/ 48° 14°/
60%
Tuesday
Mostly Cloudy
62°/ 45° 17°/
0%
Wednesday
Partly Cloudy
65°/ 48° 18°/
0%
Thursday
Partly Cloudy
68°20°
0%

Day: Cloudy. Highs in the mid 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph.

Night: Showers likely with a chance of thunderstorms. Humid with lows in the mid 60s. Southeast winds 10 to 15 mph. Chance of rain 70 percent.

Chariton, IA

Today
Partly Cloudy
82°/ 70° 28°/ 21°
40%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
90%
Sunday
Thunderstorms
70°/ 58° 21°/ 14°
70%
Monday
Rain Showers
60°/ 52° 16°/ 11°
70%
Tuesday
Mostly Cloudy
60°/ 48° 16°/
0%
Wednesday
Partly Cloudy
62°/ 52° 17°/ 11°
0%
Thursday
Partly Cloudy
68°20°
0%

Day: Patchy fog late this morning. Partly sunny. Highs in the lower 80s. Southeast winds around 10 mph.

Night: Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds 5 to 10 mph. Chance of rain 40 percent.

Iowa Falls, IA

Today
Mostly Cloudy
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Thunderstorms
65°/ 52° 18°/ 11°
70%
Monday
Rain Showers
60°/ 48° 16°/
60%
Tuesday
Mostly Cloudy
62°/ 45° 17°/
0%
Wednesday
Sunny
65°/ 48° 18°/
0%
Thursday
Partly Cloudy
68°20°
0%

Day: Mostly cloudy. Highs in the mid 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph.

Night: A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the mid 60s. Southeast winds 10 to 15 mph. Chance of rain 70 percent.

Creston, IA

Today
Partly Cloudy
85°/ 70° 29°/ 21°
40%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
90%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
70%
Monday
Rain Showers
58°/ 52° 14°/ 11°
70%
Tuesday
Mostly Cloudy
60°/ 48° 16°/
0%
Wednesday
Partly Cloudy
62°/ 52° 17°/ 11°
20%
Thursday
Rain Showers
68°20°
20%

Day: Patchy fog late this morning. Partly sunny. Highs in the mid 80s. Southeast winds around 10 mph with gusts up to 20 mph.

Night: Mostly clear in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds around 10 mph with gusts up to 20 mph. Chance of rain 40 percent.

Fort Dodge, IA

Today
Thunderstorms
78°/ 65° 26°/ 18°
70%
Saturday
Thunderstorms
75°/ 58° 24°/ 14°
50%
Sunday
Thunderstorms
65°/ 52° 18°/ 11°
60%
Monday
Rain Showers
58°/ 48° 14°/
60%
Tuesday
Mostly Cloudy
62°/ 45° 17°/
0%
Wednesday
Partly Cloudy
65°/ 48° 18°/
0%
Thursday
Rain Showers
68°20°
20%

Day: Mostly cloudy. A slight chance of showers and thunderstorms this afternoon. Highs in the upper 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.

Night: Showers and thunderstorms likely in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. Southeast winds 5 to 10 mph. Chance of rain 70 percent.

Grinnell, IA

Today
Thunderstorms
78°/ 68° 26°/ 20°
70%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
90%
Sunday
Thunderstorms
68°/ 55° 20°/ 13°
90%
Monday
Rain Showers
62°/ 50° 17°/ 10°
70%
Tuesday
Mostly Cloudy
62°/ 45° 17°/
0%
Wednesday
Sunny
65°/ 48° 18°/
0%
Thursday
Partly Cloudy
68°20°
0%

Day: Mostly cloudy. A slight chance of showers and thunderstorms late this morning. Patchy fog late this morning. Highs in the upper 70s. East winds 10 to 15 mph. Chance of rain 20 percent.

Night: Mostly cloudy. Showers likely with a chance of thunderstorms after midnight. Humid with lows in the upper 60s. Southeast winds 5 to 10 mph. Chance of rain 70 percent.

Oskaloosa, IA

Today
Mostly Cloudy
80°/ 70° 27°/ 21°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
90%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
90%
Monday
Rain Showers
62°/ 52° 17°/ 11°
70%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Sunny
65°/ 52° 18°/ 11°
0%
Thursday
Partly Cloudy
68°20°
0%

Day: Mostly cloudy late this morning, then becoming partly sunny. Patchy fog late this morning. Highs around 80. Southeast winds around 10 mph with gusts up to 20 mph.

Night: Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. Southeast winds 5 to 10 mph. Chance of rain 50 percent.

Names listed above may include county names.

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