Current Conditions

Johnston, Iowa

75°F24°C

Rain

Wind

E 8 mph13 km/h

Humidity

93%

Cloud Cover

96%

As of Thursday, August 13, 2026 at 1:50 AM CDT

Today's Outlook

Day

Overcast and warm, with a high of 82°F28°C and morning low of 72°F22°C — feels like 88°F31°C. Breezy from the ESE at 8 to 11 mph13 to 17 km/h. 86% chance of rain throughout the day. Heavy, humid air.

Night

Overcast, with a low around 74°F23°C. Breezy from the E at 9 to 11 mph14 to 17 km/h. 61% chance of rain in the evening.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 82°F28°CFeels 88°F31°C	Low 72°F22°C	Precip 0.47 in11.9 mm86%	Cloud 94%	Wind E 8 mph14 km/h	Thursday: Overcast and warm, with a high of 82°F28°C and morning low of 72°F22°C — feels like 88°F31°C. Breezy from the ESE at 8 to 11 mph13 to 17 km/h. 86% chance of rain throughout the day. Heavy, humid air. Thursday Night: Overcast, with a low around 74°F23°C. Breezy from the E at 9 to 11 mph14 to 17 km/h. 61% chance of rain in the evening.
Rain	High 81°F27°CFeels 87°F31°C	Low 71°F22°C	Precip 0.98 in24.8 mm89%	Cloud 97%	Wind ESE 10 mph15 km/h	Friday: Overcast and warm, with a high of 81°F27°C and morning low of 71°F22°C — feels like 88°F31°C. Breezy from the SE at 9 to 10 mph15 to 17 km/h. 81% chance of rain throughout the day. Heavy, humid air. Friday Night: Overcast, with a low around 72°F22°C. Breezy from the E at 10 to 11 mph15 to 17 km/h. 89% chance of rain throughout the night.
Rain	High 86°F30°CFeels 95°F35°C	Low 74°F23°C	Precip 0.53 in13.5 mm65%	Cloud 91%	Wind SE 6 mph10 km/h	Saturday: Overcast and warm, with a high of 86°F30°C and morning low of 74°F23°C — feels like 95°F35°C. Light wind from the S around 6 mph10 km/h. 44% chance of light rain throughout the day. Heat risk in the afternoon. Saturday Night: Overcast, with a low around 74°F23°C. Breezy from the ESE at 7 to 9 mph11 to 14 km/h. 65% chance of rain throughout the night.
Light Rain	High 80°F27°C	Low 70°F21°C	Precip 0.17 in4.2 mm32%	Cloud 73%	Wind NNW 7 mph11 km/h	Sunday: Overcast and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the NNW at 8 to 9 mph14 to 15 km/h. 32% chance of light rain throughout the day. Heavy, humid air. Sunday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the NNW at 6 to 7 mph9 to 11 km/h. 26% chance of showers throughout the night.
Partly Cloudy	High 82°F28°C	Low 63°F17°C	Precip 0 in0.1 mm3%	Cloud 47%	Wind NNW 4 mph7 km/h	Monday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 63°F17°C. Light wind from the NNW around 4 mph6 km/h. Monday Night: Partly cloudy, with a low around 65°F18°C. Light wind from the NNW around 4 mph7 km/h.
Showers	High 86°F30°CFeels 91°F33°C	Low 67°F20°C	Precip 0.1 in2.5 mm25%	Cloud 55%	Wind S 8 mph13 km/h	Tuesday: Mostly cloudy and hot, with a high of 86°F30°C and morning low of 67°F20°C — feels like 91°F33°C. Breezy from the S at 9 to 11 mph15 to 17 km/h. Humid. Tuesday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the S at 7 to 8 mph11 to 13 km/h. 25% chance of showers in the evening.
Showers	High 83°F28°CFeels 86°F30°C	Low 70°F21°C	Precip 0.24 in6.1 mm42%	Cloud 58%	Wind NNW 8 mph12 km/h	Wednesday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 70°F21°C. Breezy from the NNW at 8 to 9 mph13 to 14 km/h. 21% chance of drizzle throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 71°F22°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h. 42% chance of showers throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	82°F28°C Feels 88°F31°C	72°F22°C	0.47 in11.9 mm· 86%	94%	Rain	E 8 mph14 km/h
DayOvercast and warm, with a high of 82°F28°C and morning low of 72°F22°C — feels like 88°F31°C. Breezy from the ESE at 8 to 11 mph13 to 17 km/h. 86% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 74°F23°C. Breezy from the E at 9 to 11 mph14 to 17 km/h. 61% chance of rain in the evening.
	FridayAug 14	81°F27°C Feels 87°F31°C	71°F22°C	0.98 in24.8 mm· 89%	97%	Rain	ESE 10 mph15 km/h
DayOvercast and warm, with a high of 81°F27°C and morning low of 71°F22°C — feels like 88°F31°C. Breezy from the SE at 9 to 10 mph15 to 17 km/h. 81% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 72°F22°C. Breezy from the E at 10 to 11 mph15 to 17 km/h. 89% chance of rain throughout the night.
	SaturdayAug 15	86°F30°C Feels 95°F35°C	74°F23°C	0.53 in13.5 mm· 65%	91%	Rain	SE 6 mph10 km/h
DayOvercast and warm, with a high of 86°F30°C and morning low of 74°F23°C — feels like 95°F35°C. Light wind from the S around 6 mph10 km/h. 44% chance of light rain throughout the day. Heat risk in the afternoon. NightOvercast, with a low around 74°F23°C. Breezy from the ESE at 7 to 9 mph11 to 14 km/h. 65% chance of rain throughout the night.
	SundayAug 16	80°F27°C	70°F21°C	0.17 in4.2 mm· 32%	73%	Light Rain	NNW 7 mph11 km/h
DayOvercast and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the NNW at 8 to 9 mph14 to 15 km/h. 32% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 70°F21°C. Breezy from the NNW at 6 to 7 mph9 to 11 km/h. 26% chance of showers throughout the night.
	MondayAug 17	82°F28°C	63°F17°C	0 in0.1 mm· 3%	47%	Partly Cloudy	NNW 4 mph7 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 63°F17°C. Light wind from the NNW around 4 mph6 km/h. NightPartly cloudy, with a low around 65°F18°C. Light wind from the NNW around 4 mph7 km/h.
	TuesdayAug 18	86°F30°C Feels 91°F33°C	67°F20°C	0.1 in2.5 mm· 25%	55%	Showers	S 8 mph13 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 67°F20°C — feels like 91°F33°C. Breezy from the S at 9 to 11 mph15 to 17 km/h. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the S at 7 to 8 mph11 to 13 km/h. 25% chance of showers in the evening.
	WednesdayAug 19	83°F28°C Feels 86°F30°C	70°F21°C	0.24 in6.1 mm· 42%	58%	Showers	NNW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 70°F21°C. Breezy from the NNW at 8 to 9 mph13 to 14 km/h. 21% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 71°F22°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h. 42% chance of showers throughout the night.
	ThursdayAug 20	79°F26°C	65°F18°C	0.07 in1.8 mm· 13%	49%	Drizzle	NNE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 65°F18°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 66°F19°C. Light wind from the NE around 6 mph10 km/h.
	FridayAug 21	81°F27°C	63°F17°C	0.07 in1.8 mm· 10%	41%	Showers	ESE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 63°F17°C. Breezy from the SE at 7 to 8 mph11 to 12 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 64°F18°C. Light wind from the ESE around 6 mph10 km/h.
	SaturdayAug 22	84°F29°C	64°F18°C	0.02 in0.4 mm· 6%	33%	Clear	SE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 64°F18°C. Breezy from the SE at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 66°F19°C. Breezy from the SE at 6 to 7 mph10 to 11 km/h.
	SundayAug 23	86°F30°C Feels 89°F32°C	66°F19°C	0.04 in1.1 mm· 7%	31%	Clear	SSE 7 mph11 km/h
DayPartly cloudy and hot, with a high of 86°F30°C and morning low of 66°F19°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. Humid. NightPartly cloudy, with a low around 67°F20°C. Breezy from the SE at 6 to 7 mph10 to 11 km/h.
	MondayAug 24	85°F30°C	67°F19°C	0.02 in0.6 mm· 7%	36%	Clear	SE 7 mph12 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 67°F19°C. Breezy from the SE at 8 to 9 mph13 to 14 km/h. Humid. NightPartly cloudy, with a low around 68°F20°C. Breezy from the SE at 7 mph11 km/h.
	TuesdayAug 25	85°F29°C	66°F19°C	0.04 in1 mm· 6%	40%	Clear	SE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 66°F19°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 68°F20°C. Breezy from the ESE at 7 mph11 km/h.
	WednesdayAug 26	84°F29°C	66°F19°C	0.06 in1.5 mm· 12%	48%	Drizzle	ESE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 84°F29°C and morning low of 66°F19°C. Breezy from the SE at 8 mph12 km/h. 12% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 68°F20°C. Breezy from the ESE at 7 mph11 km/h. 12% chance of drizzle throughout the night.
	ThursdayAug 27	83°F29°C	66°F19°C	0.06 in1.5 mm· 11%	51%	Drizzle	ESE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 83°F29°C and morning low of 66°F19°C. Breezy from the ESE at 8 mph12 km/h. 10% chance of drizzle in the morning. NightPartly cloudy, with a low around 67°F20°C. Breezy from the ESE at 7 mph11 km/h. 11% chance of drizzle throughout the night.

Nearby Cities

Urbandale3 mi5 km Clive5 mi8 km Ankeny6 mi10 km West Des Moines7 mi11 km Des Moines7 mi11 km Waukee11 mi17 km

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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

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