Current Conditions

Johnston, Iowa

69°F21°C
Light Rain

Wind

SE 8 mph12 km/h

Humidity

66%

Cloud Cover

85%

As of Thursday, July 23, 2026 at 11:53 PM CDT

Today's Outlook

Night

Overcast, with a low around 68°F20°C. Breezy from the SSE at 8 to 9 mph12 to 14 km/h. 33% chance of drizzle overnight.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
FridayJul 24Light RainHigh 72°F22°CLow 66°F19°CPrecip 0.14 in3.5 mm79%Cloud 93%Wind SSE 8 mph13 km/hFriday: Overcast and warm, with a high of 72°F22°C and morning low of 66°F19°C. Breezy from the SSE at 9 to 10 mph14 to 17 km/h. 79% chance of light rain throughout the day. Friday Night: Overcast, with a low around 68°F20°C. Breezy from the SSE at 8 to 9 mph12 to 14 km/h. 33% chance of drizzle overnight.
SaturdayJul 25HotHigh 91°F33°CFeels 103°F39°CLow 70°F21°CPrecip 0.01 in0.2 mm2%Cloud 63%Wind SSW 6 mph10 km/hSaturday: Mostly cloudy and hot, with a high of 91°F33°C and morning low of 71°F22°C — feels like 102°F39°C. Light wind from the SSW around 6 mph9 km/h. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the S at 6 to 7 mph10 to 11 km/h.
SundayJul 26ShowersHigh 97°F36°CFeels 115°F46°CLow 78°F25°CPrecip 0.06 in1.4 mm19%Cloud 57%Wind S 8 mph12 km/hSunday: Mostly cloudy and hot, with a high of 97°F36°C and morning low of 78°F26°C — feels like 115°F46°C. Breezy from the SSW at 8 to 11 mph13 to 17 km/h. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 78°F25°C. Breezy from the S at 7 to 9 mph12 to 14 km/h. 19% chance of showers in the evening.
MondayJul 27ShowersHigh 97°F36°CFeels 111°F44°CLow 78°F26°CPrecip 0.08 in2.1 mm28%Cloud 17%Wind WSW 7 mph11 km/hMonday: Mostly clear and hot, with a high of 97°F36°C and morning low of 78°F26°C — feels like 111°F44°C. Breezy from the WSW at 7 mph11 km/h. Heat risk in the afternoon. Monday Night: Mostly clear, with a low around 80°F27°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 28% chance of showers overnight.
TuesdayJul 28HotHigh 93°F34°CFeels 98°F36°CLow 75°F24°CPrecip 0 in0.1 mm2%Cloud 37%Wind NNE 6 mph10 km/hTuesday: Partly cloudy and hot, with a high of 93°F34°C and morning low of 75°F24°C. Light wind from the NNE around 6 mph10 km/h. Heat risk in the afternoon. Tuesday Night: Partly cloudy, with a low around 76°F24°C. Light wind from the NNE around 6 mph9 km/h.
WednesdayJul 29HotHigh 93°F34°CFeels 96°F36°CLow 72°F22°CPrecip 0 in0.1 mm4%Cloud 17%Wind ESE 5 mph9 km/hWednesday: Mostly clear and hot, with a high of 93°F34°C and morning low of 72°F22°C. Light wind from the SE around 6 mph9 km/h. Heat risk in the afternoon. Wednesday Night: Mostly clear, with a low around 73°F23°C. Light wind from the ESE around 5 mph8 km/h.
ThursdayJul 30DrizzleHigh 92°F34°CFeels 96°F36°CLow 73°F23°CPrecip 0.02 in0.6 mm11%Cloud 32%Wind SSE 6 mph10 km/hThursday: Partly cloudy and hot, with a high of 92°F34°C and morning low of 73°F23°C. Breezy from the SSE at 7 mph11 km/h. Heat risk in the afternoon. Thursday Night: Partly cloudy, with a low around 73°F23°C. Light wind from the SSE around 6 mph9 km/h. 11% chance of drizzle in the evening.

15-Day Forecast

Day High (°F) Low (°F) Precip (mm) Cloud Cover (%) Condition Wind (mph)

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 41.6730°N, 93.6977°W·Elevation: 253m·Timezone: America/Chicago·Population: 20,871