Cooperstown, Illinois Weather
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Weather Forecast for Cooperstown, Illinois : Brown County
Issued: 4:16 am CDT Sep 16, 2025 Latitude: 39.9639371 Longitude: -90.6065164 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Wednesday Thursday Friday Saturday Sunday Monday
Sunny on Today Mostly Clear on Tonight Sunny on Wednesday Mostly Sunny on Thursday 50% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday 30% chance of on Sunday 20% chance of thunderstorms on Monday
High: 91°F Low: 59°F High: 91°F High: 92°F High: 83°F High: 83°F High: 84°F High: 84°F
Low: 60°F Low: 64°F Low: 62°F Low: 62°F Low: 64°F  
Sunny Mostly Clear Sunny Mostly Sunny Thunderstorms Thunderstorms Partly Sunny Thunderstorms
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Sunny on Today Today... Sunny, with a high near 91. Calm wind becoming northeast 5 to 8 mph in the afternoon.
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 59. Northeast wind 3 to 6 mph.
Sunny on Wednesday Wednesday... Sunny, with a high near 91. Light east wind.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 60. Calm wind.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
30% chance of thunderstorms Thursday Night Thursday Night... A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
50% chance of thunderstorms Friday Friday... A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 83. Chance of precipitation is 50%.
50% chance of thunderstorms Friday Night Friday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
30% chance of thunderstorms Saturday Saturday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
30% chance of thunderstorms Saturday Night Saturday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
30% chance of Sunday Sunday... A 30 percent chance of showers. Partly sunny, with a high near 84.
30% chance of thunderstorms Sunday Night Sunday Night... A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
20% chance of thunderstorms Monday Monday... A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Sun Almanac for Cooperstown, Illinois
Sunrise: 06:45 AM
Sunset: 7:09 PM
Civil Sunrise:06:18 AM
Civil Sunset: 7:36 PM
Nautical Sunrise: 05:46 AM
Nautical Sunset: 8:08 PM
Astro Sunrise: 05:13 AM
Astro Sunset: 8:41 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.