Current Conditions

Johnston, Iowa

56°F13°C

Partly Cloudy

Wind

E 6 mph10 km/h

Humidity

86%

Cloud Cover

71%

As of Wednesday, September 23, 2026 at 4:54 AM CDT

Today's Outlook

Day

Partly cloudy and warm, with a high of 69°F21°C and morning low of 53°F12°C. Breezy from the ESE at 8 to 9 mph12 to 14 km/h.

Night

Mostly cloudy, with a low around 56°F13°C. Breezy from the E at 6 to 7 mph10 to 12 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 69°F21°C	Low 53°F12°C	Precip 0 in0 mm—	Cloud 53%	Wind E 7 mph11 km/h	Wednesday: Partly cloudy and warm, with a high of 69°F21°C and morning low of 53°F12°C. Breezy from the ESE at 8 to 9 mph12 to 14 km/h. Wednesday Night: Mostly cloudy, with a low around 56°F13°C. Breezy from the E at 6 to 7 mph10 to 12 km/h.
Light Rain	High 68°F20°C	Low 54°F12°C	Precip 0.04 in1 mm61%	Cloud 88%	Wind SE 6 mph10 km/h	Thursday: Overcast and mild, with a high of 68°F20°C and morning low of 54°F12°C. Light wind from the SE around 6 mph10 km/h. Thursday Night: Overcast, with a low around 55°F13°C. Light wind from the ESE around 6 mph10 km/h. 61% chance of light rain in the evening.
Light Rain	High 66°F19°C	Low 60°F16°C	Precip 0.43 in10.8 mm71%	Cloud 98%	Wind ESE 7 mph11 km/h	Friday: Overcast and mild, with a high of 66°F19°C and morning low of 60°F16°C. Breezy from the ESE at 7 to 9 mph12 to 14 km/h. 71% chance of light rain throughout the day. Friday Night: Overcast, with a low around 61°F16°C. Breezy from the ESE at 6 to 8 mph10 to 13 km/h. 69% chance of light rain throughout the night.
Rain	High 63°F17°C	Low 60°F16°C	Precip 0.54 in13.7 mm83%	Cloud 98%	Wind SE 10 mph16 km/h	Saturday: Overcast and mild, with a high of 63°F17°C. Breezy from the SE at 11 mph17 km/h. 83% chance of rain throughout the day. Saturday Night: Overcast, with a low around 60°F16°C. Breezy from the ESE at 9 to 10 mph15 to 15 km/h. 72% chance of light rain throughout the night.
Light Rain	High 68°F20°C	Low 59°F15°C	Precip 0.16 in4 mm57%	Cloud 81%	Wind ESE 6 mph9 km/h	Sunday: Overcast and mild, with a high of 68°F20°C and morning low of 59°F15°C. Light wind from the ESE around 6 mph9 km/h. 49% chance of light rain throughout the day. Sunday Night: Mostly cloudy, with a low around 59°F15°C. Breezy from the ESE at 6 to 8 mph9 to 13 km/h. 57% chance of light rain overnight.
Partly Cloudy	High 73°F23°C	Low 56°F13°C	Precip 0 in0.1 mm3%	Cloud 67%	Wind SE 6 mph9 km/h	Monday: Mostly cloudy and warm, with a high of 73°F23°C and morning low of 56°F13°C. Breezy from the SE at 6 to 7 mph9 to 12 km/h. Monday Night: Mostly cloudy, with a low around 58°F14°C. Breezy from the ESE at 5 to 7 mph9 to 11 km/h.
Light Rain	High 69°F20°C	Low 59°F15°C	Precip 0.41 in10.5 mm57%	Cloud 90%	Wind SSE 9 mph14 km/h	Tuesday: Overcast and warm, with a high of 69°F20°C and morning low of 59°F15°C. Breezy from the SSE at 9 to 10 mph14 to 16 km/h. 55% chance of light rain throughout the day. Tuesday Night: Overcast, with a low around 60°F15°C. Breezy from the SE at 8 to 9 mph13 to 14 km/h. 57% chance of light rain throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	69°F21°C	53°F12°C	0 in0 mm· —	53%	Partly Cloudy	E 7 mph11 km/h
DayPartly cloudy and warm, with a high of 69°F21°C and morning low of 53°F12°C. Breezy from the ESE at 8 to 9 mph12 to 14 km/h. NightMostly cloudy, with a low around 56°F13°C. Breezy from the E at 6 to 7 mph10 to 12 km/h.
	ThursdaySep 24	68°F20°C	54°F12°C	0.04 in1 mm· 61%	88%	Light Rain	SE 6 mph10 km/h
DayOvercast and mild, with a high of 68°F20°C and morning low of 54°F12°C. Light wind from the SE around 6 mph10 km/h. NightOvercast, with a low around 55°F13°C. Light wind from the ESE around 6 mph10 km/h. 61% chance of light rain in the evening.
	FridaySep 25	66°F19°C	60°F16°C	0.43 in10.8 mm· 71%	98%	Light Rain	ESE 7 mph11 km/h
DayOvercast and mild, with a high of 66°F19°C and morning low of 60°F16°C. Breezy from the ESE at 7 to 9 mph12 to 14 km/h. 71% chance of light rain throughout the day. NightOvercast, with a low around 61°F16°C. Breezy from the ESE at 6 to 8 mph10 to 13 km/h. 69% chance of light rain throughout the night.
	SaturdaySep 26	63°F17°C	60°F16°C	0.54 in13.7 mm· 83%	98%	Rain	SE 10 mph16 km/h
DayOvercast and mild, with a high of 63°F17°C. Breezy from the SE at 11 mph17 km/h. 83% chance of rain throughout the day. NightOvercast, with a low around 60°F16°C. Breezy from the ESE at 9 to 10 mph15 to 15 km/h. 72% chance of light rain throughout the night.
	SundaySep 27	68°F20°C	59°F15°C	0.16 in4 mm· 57%	81%	Light Rain	ESE 6 mph9 km/h
DayOvercast and mild, with a high of 68°F20°C and morning low of 59°F15°C. Light wind from the ESE around 6 mph9 km/h. 49% chance of light rain throughout the day. NightMostly cloudy, with a low around 59°F15°C. Breezy from the ESE at 6 to 8 mph9 to 13 km/h. 57% chance of light rain overnight.
	MondaySep 28	73°F23°C	56°F13°C	0 in0.1 mm· 3%	67%	Partly Cloudy	SE 6 mph9 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 56°F13°C. Breezy from the SE at 6 to 7 mph9 to 12 km/h. NightMostly cloudy, with a low around 58°F14°C. Breezy from the ESE at 5 to 7 mph9 to 11 km/h.
	TuesdaySep 29	69°F20°C	59°F15°C	0.41 in10.5 mm· 57%	90%	Light Rain	SSE 9 mph14 km/h
DayOvercast and warm, with a high of 69°F20°C and morning low of 59°F15°C. Breezy from the SSE at 9 to 10 mph14 to 16 km/h. 55% chance of light rain throughout the day. NightOvercast, with a low around 60°F15°C. Breezy from the SE at 8 to 9 mph13 to 14 km/h. 57% chance of light rain throughout the night.
	WednesdaySep 30	67°F20°C	59°F15°C	0.41 in10.4 mm· 49%	77%	Light Rain	NW 10 mph15 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 59°F15°C. Breezy from the NW at 10 to 11 mph16 to 18 km/h. 35% chance of light rain throughout the day. NightMostly cloudy, with a low around 59°F15°C. Breezy from the NW at 9 mph14 km/h. 49% chance of light rain throughout the night.
	ThursdayOct 1	68°F20°C	54°F12°C	0.15 in3.8 mm· 23%	59%	Showers	NNW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 54°F12°C. Breezy from the NNW at 10 to 11 mph16 to 18 km/h. 23% chance of showers throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the NW at 8 to 9 mph14 to 14 km/h. 23% chance of showers throughout the night.
	FridayOct 2	70°F21°C	53°F12°C	0.1 in2.5 mm· 17%	55%	Drizzle	S 9 mph14 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 53°F12°C. Breezy from the SSW at 9 to 10 mph15 to 16 km/h. 15% chance of drizzle throughout the day. NightMostly cloudy, with a low around 54°F12°C. Breezy from the SSE at 8 mph13 km/h. 17% chance of drizzle throughout the night.
	SaturdayOct 3	68°F20°C	54°F12°C	0.1 in2.6 mm· 16%	64%	Drizzle	W 9 mph15 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 54°F12°C. Breezy from the W at 10 to 12 mph17 to 19 km/h. 15% chance of drizzle throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the W at 9 mph14 km/h. 16% chance of drizzle throughout the night.
	SundayOct 4	64°F18°C	50°F10°C	0.09 in2.4 mm· 18%	55%	Drizzle	NW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 50°F10°C. Breezy from the NW at 11 to 12 mph17 to 19 km/h. 17% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 53°F12°C. Breezy from the NW at 9 mph14 km/h. 18% chance of drizzle throughout the night.
	MondayOct 5	65°F19°C	48°F9°C Feels 44°F7°C	0.11 in2.8 mm· 11%	46%	Drizzle	W 9 mph14 km/h
DayPartly cloudy and mild, with a high of 65°F19°C and morning low of 48°F9°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 11% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 50°F10°C. Breezy from the W at 8 mph13 km/h. 11% chance of drizzle throughout the night.
	TuesdayOct 6	67°F19°C	48°F9°C Feels 45°F7°C	0.09 in2.3 mm· 13%	37%	Drizzle	W 9 mph15 km/h
DayPartly cloudy and mild, with a high of 67°F19°C and morning low of 48°F9°C. Breezy from the W at 10 to 12 mph17 to 19 km/h. Dry air. NightPartly cloudy, with a low around 50°F10°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 13% chance of drizzle throughout the night.
	WednesdayOct 7	68°F20°C	47°F8°C Feels 43°F6°C	0.04 in1 mm· 7%	26%	Clear	WNW 9 mph14 km/h
DayPartly cloudy and warm, with a high of 68°F20°C and morning low of 47°F8°C. Breezy from the WNW at 10 to 11 mph16 to 17 km/h. Dry air. NightPartly cloudy, with a low around 49°F10°C. Breezy from the WNW at 8 mph13 km/h.

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.

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