See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
16°
Overcast
Feels Like: 15°
Min: 6°
Max: 20°
The next few hours will be clear, with tomorrow reaching 22°C and dropping to 12°C. The coming days will be cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:41
Sunrise
19:01
Sunset
Moon
Waxing Crescent
10:35
Moonrise
20:01
Moonset
Daily Forecast
Monday
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
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UV Index
Humidity
Weather in Sun Prairie tomorrow, September 15, 2026
Cloud cover dominates in Sun Prairie on September 15, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells. The first half of the day looks overcast, as cloud amounts reach about 100% around 00:00. Brighter weather, if it comes, waits until later.
Expect highs of 22°C and cooler readings close to 14°C. Relative humidity sits between 22% and 97%, reaching its peak around 08:00. Expect gentle winds, highest near 00:00 at 8.1 km/h.
Expect persistent cloud later on, with amounts around 100% by 12:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 14.5 km on average, though it can drop toward 4.1 km in thicker cloud or showers. Daylight runs from 06:43 to 18:59, lasting 12 hours 16 minutes of sunlight today.
The practical takeaway for Sun Prairie on September 15, 2026 is a cloudy day that stays usable, just not particularly bright, around 22°C.
Frequently asked questions about weather in Sun Prairie
How warm does it get in Sun Prairie?
The warmest month in Sun Prairie is July, with average high temperatures of 28°C. The average temperature during this period is around 23°C.
How cold does it get in Sun Prairie?
The coldest month in Sun Prairie is January, with average low temperatures of -9°C. The average temperature during this period is around -6°C.
What is the wettest time of year in Sun Prairie?
The wettest month in Sun Prairie is May, with an average of 108mm of precipitation.
What is the driest time of year in Sun Prairie?
The driest month in Sun Prairie is February, with an average of 41mm of precipitation.
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