Current Conditions

Johnston, Iowa

81°F27°C

Light Rain

Feels like87°F30°C

Wind

N 6 mph10 km/h

Humidity

78%

Cloud Cover

89%

As of Tuesday, September 8, 2026 at 7:00 PM CDT

Today's Outlook

Night

Overcast, with a low around 75°F24°C. Light wind from the NNE around 6 mph9 km/h. 63% chance of light rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Light Rain	High 91°F33°CFeels 99°F37°C	Low 75°F24°C	Precip 0.13 in3.3 mm63%	Cloud 72%	Wind S 6 mph10 km/h	Tuesday: Mostly cloudy and hot, with a high of 91°F33°C and morning low of 87°F30°C — feels like 99°F37°C. Breezy from the S at 7 to 9 mph12 to 14 km/h. 12% chance of drizzle in the afternoon. Heat risk in the afternoon. Tuesday Night: Overcast, with a low around 75°F24°C. Light wind from the NNE around 6 mph9 km/h. 63% chance of light rain throughout the night.
Rain	High 83°F28°CFeels 87°F30°C	Low 71°F22°C	Precip 0.31 in7.9 mm97%	Cloud 70%	Wind WNW 4 mph7 km/h	Wednesday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 71°F22°C. Light wind from the W around 5 mph7 km/h. 56% chance of light rain throughout the day. Heavy, humid air. Wednesday Night: Mostly cloudy, with a low around 71°F22°C. Light wind from the NW around 4 mph6 km/h. 97% chance of rain throughout the night.
Clear	High 82°F28°C	Low 61°F16°C	Precip 0 in0.1 mm6%	Cloud 24%	Wind NE 5 mph8 km/h	Thursday: Mostly clear and warm, with a high of 82°F28°C and morning low of 61°F16°C. Light wind from the NE around 4 mph7 km/h. Thursday Night: Mostly clear, with a low around 65°F19°C. Breezy from the NE at 5 to 7 mph9 to 11 km/h.
Clear	High 87°F31°C	Low 60°F16°C	Precip 0 in0 mm—	Cloud 19%	Wind S 10 mph16 km/h	Friday: Mostly clear and hot, with a high of 87°F31°C and morning low of 60°F16°C. Breezy from the S at 11 to 13 mph18 to 22 km/h. Friday Night: Partly cloudy, with a low around 61°F16°C. Breezy from the SSE at 9 to 11 mph14 to 18 km/h.
Showers	High 79°F26°C	Low 65°F18°C	Precip 0.11 in2.7 mm44%	Cloud 34%	Wind NW 10 mph16 km/h	Saturday: Partly cloudy and warm, with a high of 79°F26°C and morning low of 68°F20°C. Breezy from the NNW at 11 to 13 mph18 to 20 km/h. 27% chance of showers in the morning. Saturday Night: Partly cloudy, with a low around 65°F18°C. Breezy from the WSW at 8 to 12 mph13 to 19 km/h. 44% chance of showers overnight.
Showers	High 74°F23°C	Low 57°F14°C	Precip 0.13 in3.2 mm24%	Cloud 40%	Wind ENE 7 mph11 km/h	Sunday: Partly cloudy and warm, with a high of 74°F23°C and morning low of 57°F14°C. Breezy from the ENE at 7 to 9 mph12 to 14 km/h. 24% chance of showers throughout the day. Sunday Night: Partly cloudy, with a low around 58°F15°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h. 16% chance of showers in the evening.
Showers	High 83°F29°C	Low 62°F16°C	Precip 0.32 in8.1 mm32%	Cloud 59%	Wind SSE 13 mph20 km/h	Monday: Mostly cloudy and warm, with a high of 83°F29°C and morning low of 62°F16°C. Windy from the SSE at 14 to 16 mph22 to 26 km/h. 31% chance of showers throughout the day. Monday Night: Mostly cloudy, with a low around 62°F17°C. Breezy from the SSE at 11 to 13 mph18 to 21 km/h. 32% chance of showers throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 8	91°F33°C Feels 99°F37°C	75°F24°C	0.13 in3.3 mm· 63%	72%	Light Rain	S 6 mph10 km/h
DayMostly cloudy and hot, with a high of 91°F33°C and morning low of 87°F30°C — feels like 99°F37°C. Breezy from the S at 7 to 9 mph12 to 14 km/h. 12% chance of drizzle in the afternoon. Heat risk in the afternoon. NightOvercast, with a low around 75°F24°C. Light wind from the NNE around 6 mph9 km/h. 63% chance of light rain throughout the night.
	WednesdaySep 9	83°F28°C Feels 87°F30°C	71°F22°C	0.31 in7.9 mm· 97%	70%	Rain	WNW 4 mph7 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 71°F22°C. Light wind from the W around 5 mph7 km/h. 56% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 71°F22°C. Light wind from the NW around 4 mph6 km/h. 97% chance of rain throughout the night.
	ThursdaySep 10	82°F28°C	61°F16°C	0 in0.1 mm· 6%	24%	Clear	NE 5 mph8 km/h
DayMostly clear and warm, with a high of 82°F28°C and morning low of 61°F16°C. Light wind from the NE around 4 mph7 km/h. NightMostly clear, with a low around 65°F19°C. Breezy from the NE at 5 to 7 mph9 to 11 km/h.
	FridaySep 11	87°F31°C	60°F16°C	0 in0 mm· —	19%	Clear	S 10 mph16 km/h
DayMostly clear and hot, with a high of 87°F31°C and morning low of 60°F16°C. Breezy from the S at 11 to 13 mph18 to 22 km/h. NightPartly cloudy, with a low around 61°F16°C. Breezy from the SSE at 9 to 11 mph14 to 18 km/h.
	SaturdaySep 12	79°F26°C	65°F18°C	0.11 in2.7 mm· 44%	34%	Showers	NW 10 mph16 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 68°F20°C. Breezy from the NNW at 11 to 13 mph18 to 20 km/h. 27% chance of showers in the morning. NightPartly cloudy, with a low around 65°F18°C. Breezy from the WSW at 8 to 12 mph13 to 19 km/h. 44% chance of showers overnight.
	SundaySep 13	74°F23°C	57°F14°C	0.13 in3.2 mm· 24%	40%	Showers	ENE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 57°F14°C. Breezy from the ENE at 7 to 9 mph12 to 14 km/h. 24% chance of showers throughout the day. NightPartly cloudy, with a low around 58°F15°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h. 16% chance of showers in the evening.
	MondaySep 14	83°F29°C	62°F16°C	0.32 in8.1 mm· 32%	59%	Showers	SSE 13 mph20 km/h
DayMostly cloudy and warm, with a high of 83°F29°C and morning low of 62°F16°C. Windy from the SSE at 14 to 16 mph22 to 26 km/h. 31% chance of showers throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the SSE at 11 to 13 mph18 to 21 km/h. 32% chance of showers throughout the night.
	TuesdaySep 15	78°F25°C	66°F19°C	0.27 in6.8 mm· 34%	61%	Showers	WSW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 67°F19°C. Breezy from the W at 10 mph16 km/h. 28% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the SSW at 9 to 11 mph14 to 18 km/h. 34% chance of showers throughout the night.
	WednesdaySep 16	77°F25°C	61°F16°C	0.25 in6.3 mm· 28%	59%	Showers	ESE 9 mph14 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 61°F16°C. Breezy from the ESE at 9 to 10 mph15 to 17 km/h. 28% chance of showers throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the ESE at 8 to 10 mph13 to 16 km/h. 28% chance of showers throughout the night.
	ThursdaySep 17	81°F27°C	67°F20°C	0.36 in9.1 mm· 43%	57%	Showers	S 10 mph17 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 67°F20°C. Breezy from the SSW at 11 to 12 mph18 to 20 km/h. 43% chance of showers throughout the day. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SSE at 10 mph16 km/h. 40% chance of showers throughout the night.
	FridaySep 18	74°F23°C	62°F16°C	0.22 in5.5 mm· 26%	53%	Showers	WNW 10 mph15 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 62°F16°C. Breezy from the W at 10 to 11 mph16 to 17 km/h. 26% chance of showers throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the NW at 9 to 10 mph15 to 16 km/h. 25% chance of showers throughout the night.
	SaturdaySep 19	71°F22°C	57°F14°C	0.23 in5.9 mm· 25%	53%	Showers	NW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 57°F14°C. Breezy from the NW at 9 to 10 mph15 to 17 km/h. 22% chance of showers throughout the day. NightMostly cloudy, with a low around 59°F15°C. Breezy from the NNW at 8 mph13 km/h. 25% chance of showers throughout the night.
	SundaySep 20	70°F21°C	53°F12°C	0.09 in2.3 mm· 14%	51%	Drizzle	N 8 mph13 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 53°F12°C. Breezy from the N at 9 mph14 km/h. 10% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 55°F13°C. Breezy from the NNE at 7 mph11 km/h. 14% chance of drizzle throughout the night.
	MondaySep 21	71°F21°C	51°F11°C	0.09 in2.2 mm· 15%	54%	Showers	E 8 mph12 km/h
DayMostly cloudy and warm, with a high of 71°F21°C and morning low of 51°F11°C. Breezy from the ESE at 8 to 9 mph14 to 15 km/h. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the E at 7 mph11 km/h. 15% chance of showers throughout the night.
	TuesdaySep 22	72°F22°C	52°F11°C	0.08 in2 mm· 13%	53%	Drizzle	SSE 8 mph13 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 52°F11°C. Breezy from the SSE at 9 mph14 km/h. 13% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the SE 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