Weather for Chatham, Illinois
Current Weather
Five Day Weather Forecast
Sun
H: 78°F
L: 41°F
Mon
H: 75°F
L: 56°F
Tue
H: 58°F
L: 49°F
Wed
H: 51°F
L: 44°F
Thu
H: 63°F
L: 44°F
Air Quality
Nitrogen Dioxide: 9.75 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 69 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:55 PM
Daylight: 13 hrs 58 mins
Moon Transit: 2:01 AM
Moonset: 6:36 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:31 AM - 4:01 AM1:58 PM - 4:28 PM
Minor Periods
9:53 PM - 11:23 PM6:06 AM - 7:36 AM
Action Rating: 4 out of 5
Flood Warning issued May 3 at 9:58AM CDT by NWS Lincoln IL
Effective: Sun May 3, 2026, 9:58 AM
Expires: Mon May 4, 2026, 2:00 AM
...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Fulton, Mason and Cass Counties. Illinois River at Beardstown affecting Morgan, Brown, Cass and Schuyler Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Illinois River at Beardstown. * WHEN...Until further notice. * IMPACTS...At 18.0 feet, Seepage problems begin in the Lost Creek Drainage and Levee District. * ADDITIONAL DETAILS... - At 9:45 AM CDT Sunday the stage was 17.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:45 AM CDT Sunday was 18.1 feet. - Forecast...The river is expected to rise to a crest of 18.0 feet this afternoon. - 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. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov.
Flood Warning issued May 3 at 9:58AM CDT by NWS Lincoln IL
Effective: Sun May 3, 2026, 9:58 AM
Expires: Mon May 4, 2026, 2:00 AM
...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Fulton, Mason and Cass Counties. Illinois River at Beardstown affecting Morgan, Brown, Cass and Schuyler 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 further notice. * ADDITIONAL DETAILS... - At 9:45 AM CDT Sunday the stage was 16.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:45 AM CDT Sunday was 16.5 feet. - Forecast...The river is expected to fall to 14.7 feet Sunday, May 10. - 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. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov.
Flood Warning issued May 2 at 8:24PM CDT by NWS St Louis MO
Effective: Sat May 2, 2026, 8:24 PM
Expires: Mon May 4, 2026, 8:30 AM
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Valley City. Illinois River at Hardin. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River at Hardin. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 28.0 feet and falling. - Recent Activity...The river rose above flood stage on April 18, cresting near 28.8 feet on May 1. - Forecast...The river is expected to continue a slow fall, but remain above flood stage. It is expected to fall as low as 25.8 feet by Saturday, May 09. - Flood stage is 25.0 feet.
Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Flood Warning issued May 3 at 10:13AM CDT by NWS St Louis MO
Effective: Sun May 3, 2026, 10:13 AM
Expires: Mon May 4, 2026, 10:15 PM
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Valley City. Illinois River at Hardin. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River at Hardin. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 10:00 AM CDT Sunday the stage was 27.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Sunday was 28.3 feet. - Forecast...The river is expected to continue a slow fall, but remain above flood stage. It is expected to fall as low as 25.9 feet by Friday, May 08. - Flood stage is 25.0 feet.
Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Flood Warning issued May 2 at 8:24PM CDT until May 10 at 1:00AM CDT by NWS St Louis MO
Effective: Sat May 2, 2026, 8:24 PM
Expires: Mon May 4, 2026, 8:30 AM
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Valley City. Illinois River at Hardin. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River at Valley City. * WHEN...Until Sunday, May 10. * IMPACTS...At 14.0 feet, The road to Norbut Fish and Wildlife area is flooded. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 15.2 feet and falling. - Recent Activity...The river rose above flood stage on April 27. It crested near 15.4 feet on May 1. - Forecast...The river is expected to fall below flood stage Friday evening and continue falling over the following days. - Flood stage is 14.0 feet.
Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.78 μg/m3
Sulphur Dioxide: 2.11 μg/m3
Ozone: 85.56 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:55 PM
Daylight: 13 hrs 58 mins
Moon Transit: 2:01 AM
Moonset: 6:36 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:31 AM - 4:01 AM1:58 PM - 4:28 PM
Minor Periods
9:53 PM - 11:23 PM6:06 AM - 7:36 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.7 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 90.04 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:56 PM
Daylight: 14 hrs mins
Moon Transit: 2:51 AM
Moonset: 7:17 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%
Best Times for Fishing or Hunting
Major Periods
2:21 AM - 4:51 AM2:49 PM - 5:19 PM
Minor Periods
12:00 AM - 12:00 AM6:47 AM - 8:17 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.95 μg/m3
Sulphur Dioxide: 2.46 μg/m3
Ozone: 85.16 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:57 PM
Daylight: 14 hrs 2 mins
Moon Transit: 3:42 AM
Moonset: 8:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.8%
Best Times for Fishing or Hunting
Major Periods
3:12 AM - 5:42 AM3:41 PM - 6:11 PM
Minor Periods
7:36 AM - 9:06 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 8.85 μg/m3
Sulphur Dioxide: 2.48 μg/m3
Ozone: 58.44 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:58 PM
Daylight: 14 hrs 5 mins
Moon Transit: 4:33 AM
Moonset: 9:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
4:03 AM - 6:33 AM4:32 PM - 7:02 PM
Minor Periods
8:31 AM - 10:01 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.6 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 58.15 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:59 PM
Daylight: 14 hrs 7 mins
Moon Transit: 5:24 AM
Moonset: 10:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%
Best Times for Fishing or Hunting
Major Periods
4:54 AM - 7:24 AM5:21 PM - 7:51 PM
Minor Periods
9:31 AM - 11:01 AM12:22 AM - 1:52 AM
Action Rating: 3 out of 5