See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
23°
Overcast
Feels Like: 23°
Min: 23°
Max: 35°
The next few hours will be overcast, with today reaching 35°C and dropping to 24°C. The coming days will be mostly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:41
Sunrise
18:53
Sunset
Moon
Waxing Crescent
12:31
Moonrise
21:03
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
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UV Index
Humidity
Weather in Mattoon today, September 16, 2026
Mattoon looks cloudy on September 16, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. The morning sky stays heavily clouded, with cover near 100% around 06:00. Grey conditions set the early tone before any later change.
Expect highs of 35°C and cooler readings close to 23°C. Expect humidity between 41% and 96%, most humid near 07:00. Expect gentle winds, highest near 15:00 at 4.2 km/h.
Afternoon skies stay clogged, peaking close to 100% near 12:00. The grey theme continues rather than clearing out. Visibility holds near 15.7 km, though it can fall to 12.7 km. The sun rises at 06:41 and sets at 18:53, for a total of 12 hours 11 minutes of sunlight today.
Taken together, overcast skies in Mattoon on September 16, 2026 favour indoor or covered options, with temperatures near 35°C.
Frequently asked questions about weather in Mattoon
How warm does it get in Mattoon?
The warmest month in Mattoon is July, with average high temperatures of 30°C. The average temperature during this period is around 25°C.
How cold does it get in Mattoon?
The coldest month in Mattoon is January, with average low temperatures of -4°C. The average temperature during this period is around -1°C.
What is the wettest time of year in Mattoon?
The wettest month in Mattoon is July, with an average of 139mm of precipitation.
What is the driest time of year in Mattoon?
The driest month in Mattoon is December, with an average of 68mm of precipitation.
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