Weather for Chatham, Illinois
Current Weather
Five Day Weather Forecast
Mon
H: 90°F
L: 64°F
Tue
H: 86°F
L: 67°F
Wed
H: 88°F
L: 72°F
Thu
H: 88°F
L: 72°F
Fri
H: 87°F
L: 73°F
Air Quality
Nitrogen Dioxide: 15.4 μg/m3
Sulphur Dioxide: 1.9 μg/m3
Ozone: 50 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:27 PM
Daylight: 14 hrs 45 mins
Moon Transit: 12:24 AM
Moonset: 8:20 PM
Moon Phase: New
Moon Illumination: 0.1%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM11:54 AM - 2:24 PM
Minor Periods
7:50 PM - 9:20 PM3:53 AM - 5:23 AM
Action Rating: 4 out of 5
Flood Warning issued July 12 at 8:58PM CDT until July 17 at 10:00PM CDT by NWS Lincoln IL
Effective: Sun July 12, 2026, 8:58 PM
Expires: Mon July 13, 2026, 1:00 PM
...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Beardstown affecting Cass, Brown, Morgan and Schuyler Counties. ...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Cass, Fulton and Mason Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River near Havana. * WHEN...Until late Friday evening. * ADDITIONAL DETAILS... - At 8:45 PM CDT Sunday the stage was 16.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Sunday was 16.8 feet. - Forecast...The river is expected to fall below flood stage Friday afternoon and continue falling to 12.9 feet Sunday, July 19. - 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 July 12 at 8:58PM CDT until July 19 at 10:00AM CDT by NWS Lincoln IL
Effective: Sun July 12, 2026, 8:58 PM
Expires: Mon July 13, 2026, 1:00 PM
...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Beardstown affecting Cass, Brown, Morgan and Schuyler Counties. ...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Cass, Fulton and Mason Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River at Beardstown. * WHEN...Until Sunday, July 19. * IMPACTS...At 18.0 feet, Seepage problems begin in the Lost Creek Drainage and Levee District. * ADDITIONAL DETAILS... - At 8:45 PM CDT Sunday the stage was 16.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Sunday was 17.0 feet. - Forecast...The river is expected to fall below flood stage Sunday, July 19 and continue falling to 13.6 feet Sunday, July 19. - 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: 9.33 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 73.25 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:27 PM
Daylight: 14 hrs 45 mins
Moon Transit: 12:24 AM
Moonset: 8:20 PM
Moon Phase: New
Moon Illumination: 0.1%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM11:54 AM - 2:24 PM
Minor Periods
7:50 PM - 9:20 PM3:53 AM - 5:23 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 16.61 μg/m3
Sulphur Dioxide: 1.52 μg/m3
Ozone: 79.42 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:26 PM
Daylight: 14 hrs 44 mins
Moon Transit: 1:28 PM
Moonset: 9:04 PM
Moon Phase: New
Moon Illumination: 1.9%
Best Times for Fishing or Hunting
Major Periods
12:30 AM - 3:00 AM12:58 AM - 3:28 PM
Minor Periods
8:34 PM - 10:04 PM5:10 AM - 6:40 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 15.2 μg/m3
Sulphur Dioxide: 2.23 μg/m3
Ozone: 86.54 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:26 PM
Daylight: 14 hrs 42 mins
Moon Transit: 2:26 PM
Moonset: 9:40 PM
Moon Phase: New
Moon Illumination: 0.2%
Best Times for Fishing or Hunting
Major Periods
1:31 AM - 4:01 AM1:56 PM - 4:26 PM
Minor Periods
9:10 PM - 10:40 PM6:30 AM - 8:00 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 11.11 μg/m3
Sulphur Dioxide: 3.08 μg/m3
Ozone: 94.46 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:25 PM
Daylight: 14 hrs 41 mins
Moon Transit: 3:19 PM
Moonset: 10:09 PM
Moon Phase: New
Moon Illumination: 2.4%
Best Times for Fishing or Hunting
Major Periods
2:26 AM - 4:56 AM2:49 PM - 5:19 PM
Minor Periods
9:39 PM - 11:09 PM7:48 AM - 9:18 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 14.05 μg/m3
Sulphur Dioxide: 2.36 μg/m3
Ozone: 49 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:24 PM
Daylight: 14 hrs 40 mins
Moon Transit: 4:08 PM
Moonset: 10:34 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%
Best Times for Fishing or Hunting
Major Periods
3:17 AM - 5:47 AM3:38 PM - 6:08 PM
Minor Periods
10:04 PM - 11:34 PM9:00 AM - 10:30 AM
Action Rating: 3 out of 5