Current Conditions

Sun Prairie, Wisconsin

69°F21°C

Light Rain

Wind

ESE 3 mph5 km/h

Humidity

96%

Cloud Cover

99%

As of Thursday, August 13, 2026 at 5:55 AM CDT

Today's Outlook

Day

Overcast and warm, with a high of 75°F24°C and morning low of 69°F21°C. Light wind from the E around 4 mph6 km/h. 90% chance of light rain around midday. Humid.

Night

Mostly cloudy, with a low around 68°F20°C. Light wind from the E around 4 mph6 km/h. 33% chance of drizzle in the evening.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Light Rain	High 75°F24°C	Low 68°F20°C	Precip 0.12 in3 mm90%	Cloud 87%	Wind E 4 mph6 km/h	Thursday: Overcast and warm, with a high of 75°F24°C and morning low of 69°F21°C. Light wind from the E around 4 mph6 km/h. 90% chance of light rain around midday. Humid. Thursday Night: Mostly cloudy, with a low around 68°F20°C. Light wind from the E around 4 mph6 km/h. 33% chance of drizzle in the evening.
Drizzle	High 78°F25°C	Low 68°F20°C	Precip 0.09 in2.2 mm30%	Cloud 94%	Wind E 7 mph12 km/h	Friday: Overcast and warm, with a high of 78°F25°C and morning low of 68°F20°C. Breezy from the E at 9 to 10 mph14 to 16 km/h. 30% chance of drizzle throughout the day. Humid. Friday Night: Overcast, with a low around 68°F20°C. Breezy from the E at 6 to 8 mph10 to 12 km/h. 29% chance of drizzle in the evening.
Light Rain	High 79°F26°C	Low 67°F20°C	Precip 0.26 in6.6 mm58%	Cloud 90%	Wind SE 6 mph10 km/h	Saturday: Overcast and warm, with a high of 79°F26°C and morning low of 68°F20°C. Breezy from the SE at 7 mph11 km/h. 58% chance of light rain throughout the day. Humid. Saturday Night: Overcast, with a low around 67°F20°C. Breezy from the ESE at 6 to 7 mph9 to 11 km/h. 23% chance of light rain throughout the night.
Light Rain	High 81°F27°CFeels 84°F29°C	Low 71°F22°C	Precip 0.22 in5.7 mm55%	Cloud 78%	Wind WNW 8 mph12 km/h	Sunday: Overcast and warm, with a high of 81°F27°C and morning low of 73°F23°C. Breezy from the NW at 9 to 10 mph14 to 16 km/h. 38% chance of light rain throughout the day. Heavy, humid air. Sunday Night: Mostly cloudy, with a low around 71°F22°C. Breezy from the WNW at 7 to 8 mph11 to 12 km/h. 55% chance of light rain throughout the night.
Partly Cloudy	High 79°F26°C	Low 63°F17°C	Precip 0.01 in0.2 mm4%	Cloud 46%	Wind NNW 5 mph8 km/h	Monday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Light wind from the NNW around 5 mph8 km/h. Monday Night: Partly cloudy, with a low around 65°F18°C. Light wind from the NNW around 5 mph7 km/h.
Showers	High 79°F26°C	Low 63°F17°C	Precip 0.11 in2.8 mm35%	Cloud 69%	Wind SW 7 mph11 km/h	Tuesday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Breezy from the SW at 8 to 10 mph13 to 16 km/h. 26% chance of light rain throughout the day. Tuesday Night: Mostly cloudy, with a low around 63°F17°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 35% chance of showers in the evening.
Rain	High 78°F26°C	Low 68°F20°C	Precip 0.34 in8.7 mm56%	Cloud 70%	Wind W 7 mph12 km/h	Wednesday: Mostly cloudy and warm, with a high of 78°F26°C and morning low of 68°F20°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 50% chance of light rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the WSW at 7 mph11 km/h. 56% chance of rain throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	75°F24°C	68°F20°C	0.12 in3 mm· 90%	87%	Light Rain	E 4 mph6 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 69°F21°C. Light wind from the E around 4 mph6 km/h. 90% chance of light rain around midday. Humid. NightMostly cloudy, with a low around 68°F20°C. Light wind from the E around 4 mph6 km/h. 33% chance of drizzle in the evening.
	FridayAug 14	78°F25°C	68°F20°C	0.09 in2.2 mm· 30%	94%	Drizzle	E 7 mph12 km/h
DayOvercast and warm, with a high of 78°F25°C and morning low of 68°F20°C. Breezy from the E at 9 to 10 mph14 to 16 km/h. 30% chance of drizzle throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Breezy from the E at 6 to 8 mph10 to 12 km/h. 29% chance of drizzle in the evening.
	SaturdayAug 15	79°F26°C	67°F20°C	0.26 in6.6 mm· 58%	90%	Light Rain	SE 6 mph10 km/h
DayOvercast and warm, with a high of 79°F26°C and morning low of 68°F20°C. Breezy from the SE at 7 mph11 km/h. 58% chance of light rain throughout the day. Humid. NightOvercast, with a low around 67°F20°C. Breezy from the ESE at 6 to 7 mph9 to 11 km/h. 23% chance of light rain throughout the night.
	SundayAug 16	81°F27°C Feels 84°F29°C	71°F22°C	0.22 in5.7 mm· 55%	78%	Light Rain	WNW 8 mph12 km/h
DayOvercast and warm, with a high of 81°F27°C and morning low of 73°F23°C. Breezy from the NW at 9 to 10 mph14 to 16 km/h. 38% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 71°F22°C. Breezy from the WNW at 7 to 8 mph11 to 12 km/h. 55% chance of light rain throughout the night.
	MondayAug 17	79°F26°C	63°F17°C	0.01 in0.2 mm· 4%	46%	Partly Cloudy	NNW 5 mph8 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Light wind from the NNW around 5 mph8 km/h. NightPartly cloudy, with a low around 65°F18°C. Light wind from the NNW around 5 mph7 km/h.
	TuesdayAug 18	79°F26°C	63°F17°C	0.11 in2.8 mm· 35%	69%	Showers	SW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Breezy from the SW at 8 to 10 mph13 to 16 km/h. 26% chance of light rain throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 35% chance of showers in the evening.
	WednesdayAug 19	78°F26°C	68°F20°C	0.34 in8.7 mm· 56%	70%	Rain	W 7 mph12 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 68°F20°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 50% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the WSW at 7 mph11 km/h. 56% chance of rain throughout the night.
	ThursdayAug 20	76°F25°C	61°F16°C	0.1 in2.6 mm· 15%	47%	Showers	NNW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 61°F16°C. Breezy from the NNW at 7 mph11 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 62°F17°C. Light wind from the NNW around 6 mph9 km/h. 15% chance of showers throughout the night.
	FridayAug 21	78°F26°C	60°F16°C	0.09 in2.3 mm· 18%	45%	Drizzle	SW 6 mph9 km/h
DayPartly cloudy and warm, with a high of 78°F26°C and morning low of 60°F16°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. 18% chance of drizzle throughout the day. NightPartly cloudy, with a low around 60°F16°C. Light wind from the SW around 5 mph8 km/h. 14% chance of drizzle throughout the night.
	SaturdayAug 22	80°F27°C	62°F17°C	0.06 in1.4 mm· 12%	41%	Drizzle	SW 6 mph9 km/h
DayPartly cloudy and warm, with a high of 80°F27°C and morning low of 62°F17°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. 11% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Light wind from the SSW around 5 mph9 km/h. 12% chance of drizzle throughout the night.
	SundayAug 23	81°F27°C	62°F17°C	0.06 in1.4 mm· 10%	39%	Drizzle	SW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 62°F17°C. Breezy from the WSW at 7 mph11 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Light wind from the SSW around 6 mph9 km/h. 10% chance of drizzle throughout the night.
	MondayAug 24	81°F27°C	63°F17°C	0.05 in1.2 mm· 11%	42%	Drizzle	SW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 63°F17°C. Breezy from the SW at 7 to 8 mph11 to 12 km/h. 11% chance of drizzle throughout the day. NightPartly cloudy, with a low around 64°F18°C. Light wind from the SSW around 6 mph9 km/h.
	TuesdayAug 25	82°F28°C	64°F18°C	0.04 in0.9 mm· 11%	43%	Drizzle	SW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 64°F18°C. Breezy from the SW at 7 mph11 km/h. 11% chance of drizzle in the morning. NightPartly cloudy, with a low around 64°F18°C. Light wind from the SSW around 6 mph9 km/h.
	WednesdayAug 26	81°F27°C	64°F18°C	0.08 in2 mm· 14%	44%	Drizzle	S 6 mph10 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 64°F18°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 64°F18°C. Light wind from the SSE around 6 mph9 km/h. 14% chance of drizzle throughout the night.
	ThursdayAug 27	80°F27°C	63°F17°C	0.07 in1.9 mm· 13%	49%	Showers	ESE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 63°F17°C. Breezy from the NE at 6 to 7 mph10 to 11 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 64°F18°C. Light wind from the ESE around 6 mph9 km/h. 13% chance of showers throughout the night.

Nearby Cities

Madison12 mi20 km Middleton16 mi25 km Fitchburg20 mi32 km Watertown24 mi39 km Beaver Dam27 mi43 km Janesville36 mi58 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: 43.1836°N, 89.2137°W·Elevation: 292m·Timezone: America/Chicago·Population: 32,365