Weather for Chatham, Illinois
Current Weather
Five Day Weather Forecast
Mon
H: 72°F
L: 60°F
Tue
H: 76°F
L: 56°F
Wed
H: 78°F
L: 61°F
Thu
H: 81°F
L: 67°F
Fri
H: 79°F
L: 65°F
Air Quality
Nitrogen Dioxide: 2 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 74 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:30 PM
Daylight: 14 hrs 59 mins
Moon Transit: 7:42 PM
Moonset: 12:55 AM
Moon Phase: First Quarter
Moon Illumination: 49.7%
Best Times for Fishing or Hunting
Major Periods
6:53 AM - 9:23 AM7:12 PM - 9:42 PM
Minor Periods
1:28 PM - 2:58 PM12:25 AM - 1:55 AM
Action Rating: 2 out of 5
Flood Warning issued June 21 at 9:14PM CDT until June 25 at 4:00PM CDT by NWS Lincoln IL
Effective: Sun June 21, 2026, 9:14 PM
Expires: Mon June 22, 2026, 1:15 PM
...The Flood Warning continues for the following rivers in Illinois... Sangamon River at Monticello affecting Piatt County. Sangamon River near Chandlerville affecting Mason and Cass Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is forecast. * WHERE...Sangamon River near Chandlerville. * WHEN...From Tuesday morning to Thursday afternoon. * ADDITIONAL DETAILS... - At 9:00 PM CDT Sunday the stage was 454.8 feet. - Forecast...The river is expected to rise above flood stage late Tuesday morning to a crest of 457.1 feet early Wednesday morning. It will then fall below flood stage late Thursday morning. - Flood stage is 456.6 feet. - http://www.weather.gov/safety/flood
Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.
Flood Warning issued June 22 at 10:18AM CDT until June 25 at 7:00AM CDT by NWS Lincoln IL
Effective: Mon June 22, 2026, 10:18 AM
Expires: Tue June 23, 2026, 2:30 AM
...The Flood Warning continues for the following rivers in Illinois... Spoon River at London Mills affecting Fulton and Knox Counties. Sangamon River at Monticello affecting Piatt County. Spoon River at Seville affecting Fulton County. Sangamon River near Chandlerville affecting Mason and Cass Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is forecast. * WHERE...Sangamon River near Chandlerville. * WHEN...From Tuesday evening to Thursday morning. * ADDITIONAL DETAILS... - At 10:00 AM CDT Monday the stage was 455.2 feet. - Forecast...The river is expected to rise above flood stage tomorrow evening to a crest of 456.8 feet early Wednesday morning. It will then fall below flood stage early Thursday morning. - Flood stage is 456.6 feet. - http://www.weather.gov/safety/flood
Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.
Flood Warning issued June 21 at 9:14PM CDT by NWS Lincoln IL
Effective: Sun June 21, 2026, 9:14 PM
Expires: Mon June 22, 2026, 1:15 PM
...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Henry affecting Putnam and Marshall Counties. ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Peoria affecting Tazewell, Peoria and Woodford Counties. Illinois River at Beardstown affecting Schuyler, Cass, Morgan and Brown Counties. Illinois River near Havana affecting Mason, Cass and Fulton Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Illinois River at Beardstown. * WHEN...Until further notice. * IMPACTS...At 20.0 feet, Seepage problems begin in the South Beardstown Drainage and Levee District. * ADDITIONAL DETAILS... - At 8:45 PM CDT Sunday the stage was 19.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Sunday was 19.8 feet. - Forecast...The river is expected to rise to a crest of 21.5 feet early Friday morning. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.
Flood Warning issued June 21 at 9:14PM CDT by NWS Lincoln IL
Effective: Sun June 21, 2026, 9:14 PM
Expires: Mon June 22, 2026, 1:15 PM
...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Henry affecting Putnam and Marshall Counties. ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Peoria affecting Tazewell, Peoria and Woodford Counties. Illinois River at Beardstown affecting Schuyler, Cass, Morgan and Brown Counties. Illinois River near Havana affecting Mason, Cass and Fulton Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Illinois River near Havana. * WHEN...Until further notice. * IMPACTS...At 19.5 feet, Access road to Anderson Lake north campground closed. * ADDITIONAL DETAILS... - At 8:45 PM CDT Sunday the stage was 18.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Sunday was 18.8 feet. - Forecast...The river is expected to rise to a crest of 19.9 feet Saturday morning. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.
Flood Warning issued June 22 at 10:13AM CDT by NWS Lincoln IL
Effective: Mon June 22, 2026, 10:13 AM
Expires: Tue June 23, 2026, 2:15 AM
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Peoria affecting Woodford, Tazewell and Peoria Counties. Illinois River at Beardstown affecting Brown, Schuyler, Cass and Morgan Counties. Illinois River near Havana affecting Fulton, Mason and Cass Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Illinois River at Beardstown. * WHEN...Until further notice. * IMPACTS...At 20.0 feet, Seepage problems begin in the South Beardstown Drainage and Levee District. * ADDITIONAL DETAILS... - At 9:45 AM CDT Monday the stage was 20.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:45 AM CDT Monday was 20.1 feet. - Forecast...The river is expected to rise to a crest of 21.5 feet early Friday morning. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.44 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 63.38 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:30 PM
Daylight: 14 hrs 59 mins
Moon Transit: 7:42 PM
Moonset: 12:55 AM
Moon Phase: First Quarter
Moon Illumination: 49.7%
Best Times for Fishing or Hunting
Major Periods
6:53 AM - 9:23 AM7:12 PM - 9:42 PM
Minor Periods
1:28 PM - 2:58 PM12:25 AM - 1:55 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 9.22 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 54.13 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:31 PM
Daylight: 14 hrs 59 mins
Moon Transit: 8:24 PM
Moonset: 1:16 AM
Moon Phase: First Quarter
Moon Illumination: 61.0%
Best Times for Fishing or Hunting
Major Periods
7:36 AM - 10:06 AM7:54 PM - 10:24 PM
Minor Periods
2:31 PM - 4:01 PM12:46 AM - 2:16 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.4 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 59.58 μg/m3
Astronomical
Sun Transit: 1:01 PM
Sunset: 8:31 PM
Daylight: 14 hrs 59 mins
Moon Transit: 9:08 PM
Moonset: 1:40 AM
Moon Phase: First Quarter
Moon Illumination: 71.7%
Best Times for Fishing or Hunting
Major Periods
8:19 AM - 10:49 AM8:38 PM - 11:08 PM
Minor Periods
3:34 PM - 5:04 PM1:10 AM - 2:40 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.81 μg/m3
Sulphur Dioxide: 0.75 μg/m3
Ozone: 61.04 μg/m3
Astronomical
Sun Transit: 1:01 PM
Sunset: 8:31 PM
Daylight: 14 hrs 59 mins
Moon Transit: 9:54 PM
Moonset: 2:07 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.2%
Best Times for Fishing or Hunting
Major Periods
9:04 AM - 11:34 AM9:24 PM - 11:54 PM
Minor Periods
4:37 PM - 6:07 PM1:37 AM - 3:07 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 26.14 μg/m3
Sulphur Dioxide: 0.71 μg/m3
Ozone: 19.75 μg/m3
Astronomical
Sun Transit: 1:01 PM
Sunset: 8:31 PM
Daylight: 14 hrs 58 mins
Moon Transit: 10:43 PM
Moonset: 2:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.2%
Best Times for Fishing or Hunting
Major Periods
9:51 AM - 12:21 AM12:00 AM - 12:00 AM
Minor Periods
5:39 PM - 7:09 PM2:08 AM - 3:38 AM
Action Rating: 2 out of 5