Weather for Alton, Illinois
Current Weather
Humidity: 99%
Feels Like: 67.5°F
Wind: NW 5.6 mph
Wind Gusts: 8.3 mph
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 2 mi
UV Index: 0
Five Day Weather Forecast
Wed
H: 84°F
L: 70°F
Thu
H: 78°F
L: 62°F
Fri
H: 79°F
L: 70°F
Sat
H: 78°F
L: 68°F
Sun
H: 81°F
L: 64°F
Air Quality
Nitrogen Dioxide: 34.6 μg/m3
Sulphur Dioxide: 4.63 μg/m3
Ozone: 32 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:23 PM
Daylight: 14 hrs 47 mins
Moon Transit: 8:25 PM
Moonset: 1:59 AM
Moon Phase: First Quarter
Moon Illumination: 59.8%
Best Times for Fishing or Hunting
Major Periods
7:34 AM - 10:04 AM7:55 PM - 10:25 PM
Minor Periods
1:53 PM - 3:23 PM1:29 AM - 2:59 AM
Action Rating: 3 out of 5
Flood Advisory issued June 4 at 5:46PM CDT until June 4 at 8:45PM CDT by NWS St Louis MO
Effective: Wed June 4, 2025, 5:46 PM
Expires: Wed June 4, 2025, 8:45 PM
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of east central Missouri, including the following county and independent city, central Saint Louis and central Saint Louis City. * WHEN...Until 845 PM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Ponding of water in urban or other areas is occurring or is imminent. In particular, portions of Deer Creek in St. Louis County have risen above flood stage. * ADDITIONAL DETAILS... - At 546 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 3 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... St. Louis, University City, Kirkwood, East St. Louis, Webster Groves, Ferguson, Manchester, Creve Coeur, Overland, Clayton, Cahokia, Jennings, Crestwood, Bellefontaine Neighbors, Town and Country, Eureka, Berkeley, Richmond Heights, Ladue and Sunset Hills.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Flood Advisory issued June 4 at 5:46PM CDT until June 4 at 8:45PM CDT by NWS St Louis MO
Effective: Wed June 4, 2025, 5:46 PM
Expires: Wed June 4, 2025, 8:45 PM
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of east central Missouri, including the following county and independent city, central Saint Louis and central Saint Louis City. * WHEN...Until 845 PM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Ponding of water in urban or other areas is occurring or is imminent. In particular, portions of Deer Creek in St. Louis County have risen above flood stage. * ADDITIONAL DETAILS... - At 546 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 3 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... St. Louis, University City, Kirkwood, East St. Louis, Webster Groves, Ferguson, Manchester, Creve Coeur, Overland, Clayton, Cahokia, Jennings, Crestwood, Bellefontaine Neighbors, Town and Country, Eureka, Berkeley, Richmond Heights, Ladue and Sunset Hills.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Flood Advisory issued June 4 at 6:15PM CDT until June 4 at 9:15PM CDT by NWS St Louis MO
Effective: Wed June 4, 2025, 6:15 PM
Expires: Wed June 4, 2025, 9:15 PM
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of east central Missouri, including the following counties, southeastern Franklin and northwestern Jefferson. * WHEN...Until 915 PM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. River or stream flows are elevated. * ADDITIONAL DETAILS... - At 615 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 3 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Arnold, Eureka, Pacific, Hillsboro, Byrnes Mill, Cedar Hill, High Ridge, Antonia, Murphy, Cedar Hill Lakes, Dittmer, Lonedell, House Springs, Scotsdale, Parkdale, Oermann, Morse Mill, Grubville, Catawissa and Robertsville.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Flood Warning issued June 4 at 9:42AM CDT until June 6 at 4:00PM CDT by NWS St Louis MO
Effective: Wed June 4, 2025, 9:42 AM
Expires: Thu June 5, 2025, 9:45 PM
...The National Weather Service in St Louis has issued a Flood Warning for the following rivers in Missouri... Cuivre River near Troy. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Cuivre River near Troy. * WHEN...From this afternoon to Friday afternoon. * IMPACTS...At 23.0 feet, Considerable agricultural land is flooded between Troy and Moscow Mills. * ADDITIONAL DETAILS... - At 9:30 AM CDT Wednesday the stage was 18.8 feet. - Forecast...The river will rise above flood stage late this afternoon to 23.0 feet just after midnight tonight. It will then fall below flood stage late tomorrow morning to 6.9 feet Tuesday morning. It will rise to 7.0 feet early Tuesday afternoon. It will then fall again and remain below flood stage. - Flood stage is 21.0 feet.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Flood Warning issued June 4 at 9:42AM CDT until June 6 at 4:00PM CDT by NWS St Louis MO
Effective: Wed June 4, 2025, 9:42 AM
Expires: Thu June 5, 2025, 9:45 PM
...The National Weather Service in St Louis has issued a Flood Warning for the following rivers in Missouri... Cuivre River near Troy. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Cuivre River near Troy. * WHEN...From this afternoon to Friday afternoon. * IMPACTS...At 23.0 feet, Considerable agricultural land is flooded between Troy and Moscow Mills. * ADDITIONAL DETAILS... - At 9:30 AM CDT Wednesday the stage was 18.8 feet. - Forecast...The river will rise above flood stage late this afternoon to 23.0 feet just after midnight tonight. It will then fall below flood stage late tomorrow morning to 6.9 feet Tuesday morning. It will rise to 7.0 feet early Tuesday afternoon. It will then fall again and remain below flood stage. - Flood stage is 21.0 feet.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Weather Forecast
Average Temperature: 75.1°F
Average Humidity: 83%
Wind: 14.1 mph
UV Index: 1.1
Air Quality
Nitrogen Dioxide: 11.52 μg/m3
Sulphur Dioxide: 3.5 μg/m3
Ozone: 101.8 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:23 PM
Daylight: 14 hrs 47 mins
Moon Transit: 8:25 PM
Moonset: 1:59 AM
Moon Phase: First Quarter
Moon Illumination: 59.8%
Best Times for Fishing or Hunting
Major Periods
7:34 AM - 10:04 AM7:55 PM - 10:25 PM
Minor Periods
1:53 PM - 3:23 PM1:29 AM - 2:59 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 69.8°F
Average Humidity: 91%
Wind: 6.3 mph
UV Index: 1.4
Air Quality
Nitrogen Dioxide: 26.26 μg/m3
Sulphur Dioxide: 3.78 μg/m3
Ozone: 65.88 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:23 PM
Daylight: 14 hrs 48 mins
Moon Transit: 9:04 PM
Moonset: 2:19 AM
Moon Phase: First Quarter
Moon Illumination: 70.6%
Best Times for Fishing or Hunting
Major Periods
8:13 AM - 10:43 AM8:34 PM - 11:04 PM
Minor Periods
2:51 PM - 4:21 PM1:49 AM - 3:19 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 73.4°F
Average Humidity: 91%
Wind: 7.4 mph
UV Index: 0.9
Air Quality
Nitrogen Dioxide: 28.29 μg/m3
Sulphur Dioxide: 5.51 μg/m3
Ozone: 78.12 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:24 PM
Daylight: 14 hrs 48 mins
Moon Transit: 9:45 PM
Moonset: 2:40 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 80.3%
Best Times for Fishing or Hunting
Major Periods
8:53 AM - 11:23 AM9:15 PM - 11:45 PM
Minor Periods
3:51 PM - 5:21 PM2:10 AM - 3:40 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 71.5°F
Average Humidity: 89%
Wind: 9.6 mph
UV Index: 2
Air Quality
Nitrogen Dioxide: 22.17 μg/m3
Sulphur Dioxide: 3.69 μg/m3
Ozone: 85.24 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:24 PM
Daylight: 14 hrs 49 mins
Moon Transit: 10:28 PM
Moonset: 3:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 88.5%
Best Times for Fishing or Hunting
Major Periods
9:35 AM - 12:05 AM12:00 AM - 12:00 AM
Minor Periods
4:51 PM - 6:21 PM2:32 AM - 4:02 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 71°F
Average Humidity: 71%
Wind: 15.7 mph
UV Index: 2.2
Air Quality
Nitrogen Dioxide: 67.53 μg/m3
Sulphur Dioxide: 6.66 μg/m3
Ozone: 55.38 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:25 PM
Daylight: 14 hrs 50 mins
Moon Transit: 11:13 PM
Moonset: 3:28 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 94.7%
Best Times for Fishing or Hunting
Major Periods
10:19 AM - 12:49 AM12:00 AM - 12:00 AM
Minor Periods
5:53 PM - 7:23 PM2:58 AM - 4:28 AM
Action Rating: 2 out of 5