Weather for Alton, Illinois
Current Weather
Humidity: 94%
Feels Like: 55.1°F
Wind: N 5.1 mph
Wind Gusts: 6.9 mph
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 6 mi
UV Index: 0.2
Five Day Weather Forecast
Sat
H: 57°F
L: 54°F
Sun
H: 75°F
L: 53°F
Mon
H: 72°F
L: 50°F
Tue
H: 79°F
L: 52°F
Wed
H: 75°F
L: 60°F
Air Quality
Nitrogen Dioxide: 66.23 μg/m3
Sulphur Dioxide: 5 μg/m3
Ozone: 25 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:42 PM
Daylight: 13 hrs 24 mins
Moon Transit: 5:57 AM
Moonset: 10:26 AM
Moon Phase: Last Quarter
Moon Illumination: 49.0%
Best Times for Fishing or Hunting
Major Periods
5:27 AM - 7:57 AM5:53 PM - 8:23 PM
Minor Periods
9:56 AM - 11:26 AM1:01 AM - 2:31 AM
Action Rating: 2 out of 5
Flood Watch issued April 19 at 3:37AM CDT until April 21 at 1:00AM CDT by NWS St Louis MO
Effective: Sat April 19, 2025, 3:37 AM
Expires: Sat April 19, 2025, 6:45 PM
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Monroe IL, Montgomery IL, Randolph IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Lincoln MO, Madison MO, Moniteau MO, Montgomery MO, Osage MO, Pike MO, Reynolds MO, Saint Charles MO, Saint Francois MO, Saint Louis City MO, Saint Louis MO, Sainte Genevieve MO, Warren MO and Washington MO. * WHEN...Through late Sunday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Additional rounds of showers and thunderstorms are likely today through Sunday. Rainfall totals of 2-4 inches are expected across much of the region with localized amounts around 5 inches. Highest rainfall totals are expected along and north of the I-44 corridor.
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Flood Watch issued April 19 at 3:37AM CDT until April 21 at 1:00AM CDT by NWS St Louis MO
Effective: Sat April 19, 2025, 3:37 AM
Expires: Sat April 19, 2025, 6:45 PM
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Monroe IL, Montgomery IL, Randolph IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Lincoln MO, Madison MO, Moniteau MO, Montgomery MO, Osage MO, Pike MO, Reynolds MO, Saint Charles MO, Saint Francois MO, Saint Louis City MO, Saint Louis MO, Sainte Genevieve MO, Warren MO and Washington MO. * WHEN...Through late Sunday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Additional rounds of showers and thunderstorms are likely today through Sunday. Rainfall totals of 2-4 inches are expected across much of the region with localized amounts around 5 inches. Highest rainfall totals are expected along and north of the I-44 corridor.
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Flood Watch issued April 19 at 3:37AM CDT until April 21 at 1:00AM CDT by NWS St Louis MO
Effective: Sat April 19, 2025, 3:37 AM
Expires: Sat April 19, 2025, 6:45 PM
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Monroe IL, Montgomery IL, Randolph IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Lincoln MO, Madison MO, Moniteau MO, Montgomery MO, Osage MO, Pike MO, Reynolds MO, Saint Charles MO, Saint Francois MO, Saint Louis City MO, Saint Louis MO, Sainte Genevieve MO, Warren MO and Washington MO. * WHEN...Through late Sunday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Additional rounds of showers and thunderstorms are likely today through Sunday. Rainfall totals of 2-4 inches are expected across much of the region with localized amounts around 5 inches. Highest rainfall totals are expected along and north of the I-44 corridor.
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Flood Watch issued April 19 at 3:37AM CDT until April 21 at 1:00AM CDT by NWS St Louis MO
Effective: Sat April 19, 2025, 3:37 AM
Expires: Sat April 19, 2025, 6:45 PM
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Monroe IL, Montgomery IL, Randolph IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Lincoln MO, Madison MO, Moniteau MO, Montgomery MO, Osage MO, Pike MO, Reynolds MO, Saint Charles MO, Saint Francois MO, Saint Louis City MO, Saint Louis MO, Sainte Genevieve MO, Warren MO and Washington MO. * WHEN...Through late Sunday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Additional rounds of showers and thunderstorms are likely today through Sunday. Rainfall totals of 2-4 inches are expected across much of the region with localized amounts around 5 inches. Highest rainfall totals are expected along and north of the I-44 corridor.
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Flood Watch issued April 19 at 3:37AM CDT until April 21 at 1:00AM CDT by NWS St Louis MO
Effective: Sat April 19, 2025, 3:37 AM
Expires: Sat April 19, 2025, 6:45 PM
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Monroe IL, Montgomery IL, Randolph IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Lincoln MO, Madison MO, Moniteau MO, Montgomery MO, Osage MO, Pike MO, Reynolds MO, Saint Charles MO, Saint Francois MO, Saint Louis City MO, Saint Louis MO, Sainte Genevieve MO, Warren MO and Washington MO. * WHEN...Through late Sunday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Additional rounds of showers and thunderstorms are likely today through Sunday. Rainfall totals of 2-4 inches are expected across much of the region with localized amounts around 5 inches. Highest rainfall totals are expected along and north of the I-44 corridor.
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Weather Forecast
Average Temperature: 56.7°F
Average Humidity: 97%
Wind: 12.1 mph
UV Index: 0.3
Air Quality
Nitrogen Dioxide: 17.12 μg/m3
Sulphur Dioxide: 2.81 μg/m3
Ozone: 59 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:42 PM
Daylight: 13 hrs 24 mins
Moon Transit: 5:57 AM
Moonset: 10:26 AM
Moon Phase: Last Quarter
Moon Illumination: 49.0%
Best Times for Fishing or Hunting
Major Periods
5:27 AM - 7:57 AM5:53 PM - 8:23 PM
Minor Periods
9:56 AM - 11:26 AM1:01 AM - 2:31 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 61.4°F
Average Humidity: 91%
Wind: 19.9 mph
UV Index: 0.7
Air Quality
Nitrogen Dioxide: 26.77 μg/m3
Sulphur Dioxide: 4.16 μg/m3
Ozone: 53.6 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:43 PM
Daylight: 13 hrs 26 mins
Moon Transit: 6:51 AM
Moonset: 11:31 AM
Moon Phase: Last Quarter
Moon Illumination: 37.8%
Best Times for Fishing or Hunting
Major Periods
6:21 AM - 8:51 AM6:46 PM - 9:16 PM
Minor Periods
11:01 AM - 12:31 AM1:47 AM - 3:17 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 61.7°F
Average Humidity: 79%
Wind: 16.6 mph
UV Index: 1.7
Air Quality
Nitrogen Dioxide: 8.13 μg/m3
Sulphur Dioxide: 2.08 μg/m3
Ozone: 80.32 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:44 PM
Daylight: 13 hrs 28 mins
Moon Transit: 7:44 AM
Moonset: 12:40 AM
Moon Phase: Last Quarter
Moon Illumination: 27.2%
Best Times for Fishing or Hunting
Major Periods
7:14 AM - 9:44 AM7:38 PM - 10:08 PM
Minor Periods
12:10 AM - 1:40 PM2:25 AM - 3:55 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 65.7°F
Average Humidity: 68%
Wind: 13.4 mph
UV Index: 1.9
Air Quality
Nitrogen Dioxide: 32.66 μg/m3
Sulphur Dioxide: 3.86 μg/m3
Ozone: 67.12 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:45 PM
Daylight: 13 hrs 31 mins
Moon Transit: 8:35 AM
Moonset: 1:51 PM
Moon Phase: Last Quarter
Moon Illumination: 17.8%
Best Times for Fishing or Hunting
Major Periods
8:05 AM - 10:35 AM8:28 PM - 10:58 PM
Minor Periods
1:21 PM - 2:51 PM2:58 AM - 4:28 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 66.4°F
Average Humidity: 76%
Wind: 11.6 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 31.08 μg/m3
Sulphur Dioxide: 4.38 μg/m3
Ozone: 60.15 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:46 PM
Daylight: 13 hrs 33 mins
Moon Transit: 9:24 AM
Moonset: 3:03 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.0%
Best Times for Fishing or Hunting
Major Periods
8:54 AM - 11:24 AM9:18 PM - 11:48 PM
Minor Periods
2:33 PM - 4:03 PM3:26 AM - 4:56 AM
Action Rating: 2 out of 5