Water Temperature of the Mississippi River in Alton, IL

Current Water Temperature

32.0°F

Measurement Time: Sunday, January 25, 2026, 9:00 AM CST

Temperature Locations

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Local Points of Interest

Maple Island; St. Louis, MO; Wood River, IL; Edward "Ted" and Pat Jones-Confluence Point State Park

Mississippi River

Station Name: Alton 2SE - Melvin Price L&D
Data Source: USGS

Elevation Above Sea Level: 407 feet

Nearest Address:
Lock and Dam Way
Alton, IL 62002
Madison County

GPS Coordinates: 38.8664, -90.1464

Nearby Water Temperatures

Missouri River, St Charles, MO (18.4 mi)
Mississippi River, Cap Au Gris, MO (30.6 mi)
Missouri River, Labadle, MO (42.7 mi)
Mississippi River, Clarksville, MO (53.7 mi)
Illinois River, Florence, IL (58.4 mi)
Sugar Creek, Chatham, IL (60.7 mi)
Lick Creek, Springfield, IL (63.3 mi)
Big River, Bonne Terre, MO (66.4 mi)
Missouri River, Hermann, MO (70.4 mi)
Illinois River, La Grange, IL (77 mi)
Mississippi River, Saverton, MO (79.4 mi)
Huzzah Creek, Butts, MO (84.1 mi)
East Fork Black River, Lesterville, MO (98.3 mi)
Mississippi River, Quincy, IL (99.1 mi)
Mason Tazewell Drainage Ditch, Topeka, IL (101.6 mi)

Weather for Alton, Illinois

Current Weather

55.2°F

Conditions: Clear

Feels Like: 52.1°F

Heat Index: 57.6°F

Humidity: 66%

Wind: SSE 11.4 mph

Wind Gusts: 20.4 mph

Wind Chill: 56.2°F

Dew Point: 40.9°F

Precipitation: 0 in

Cloud Cover: 0%

Visibility: 9 mi

Air Pressure: 1014 mbar

UV Index: 0

Five Day Weather Forecast

Fri
H: 87°F
L: 56°F

Sat
H: 80°F
L: 65°F

Sun
H: 85°F
L: 65°F

Mon
H: 86°F
L: 68°F

Tue
H: 76°F
L: 59°F

Air Quality

AQI: 1 - Good

PM2.5: 3.55 μg/m3

PM10: 3.75 μg/m3

Carbon Monoxide: 151.85 μg/m3
Nitrogen Dioxide: 8.45 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 66 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:56 AM
Sunset: 8:06 PM
Daylight: 14 hrs 19 mins

Moonrise: 4:34 AM
Moon Transit: 11:46 AM
Moonset: 7:12 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:16 AM - 1:46 PM

Minor Periods

6:42 PM - 8:12 PM
4:04 AM - 5:34 AM

Action Rating: 5 out of 5

Flood Warning issued May 14 at 9:21AM CDT until May 19 at 8:30PM CDT by NWS St Louis MO

Effective: Thu May 14, 2026, 9:21 AM
Expires: Fri May 15, 2026, 9:30 PM

...The Flood Warning is extended for the following rivers in Illinois... Kaskaskia River at Carlyle. 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...Kaskaskia River at Carlyle. * WHEN...Until Tuesday evening. * IMPACTS...At 20.3 feet, Township roads downstream in Covington begin flooding near this height. * ADDITIONAL DETAILS... - At 9:00 AM CDT Thursday the stage was 20.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 AM CDT Thursday was 20.3 feet. - Forecast...The river is expected to fall below flood stage early Monday afternoon and continue falling to 15.1 feet Thursday, May 21. - Flood stage is 16.5 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 14 at 7:36PM CDT until May 19 at 7:00PM CDT by NWS St Louis MO

Effective: Thu May 14, 2026, 7:36 PM
Expires: Sat May 16, 2026, 7:45 AM

...The Flood Warning continues for the following rivers in Illinois... Kaskaskia River at Carlyle. 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...Kaskaskia River at Carlyle. * WHEN...Until Tuesday evening. * IMPACTS...At 20.3 feet, Township roads downstream in Covington begin flooding near this height. * ADDITIONAL DETAILS... - At 7:00 PM CDT Thursday the stage was 20.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:00 PM CDT Thursday was 20.2 feet. - Forecast...The river is expected to rise to a crest of 20.2 feet just after midnight tonight. It will then fall below flood stage early Monday afternoon. - Flood stage is 16.5 feet.

Friday, May 15, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 86.9°F

Low Temperature: 56.1°F

Average Temperature: 69.2°F

Average Humidity: 58%

Precipitation: 0 in

Chance of Rain: 0%

Chance of Snow: 0%

Maximum Wind: 18.1 mph

UV Index: 8.1

Air Quality

AQI: 1 - Good

PM2.5: 5.37 μg/m3

PM10: 5.69 μg/m3

Carbon Monoxide: 161.85 μg/m3
Nitrogen Dioxide: 8.65 μg/m3
Sulphur Dioxide: 2.42 μg/m3
Ozone: 84.08 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:56 AM
Sunset: 8:06 PM
Daylight: 14 hrs 19 mins

Moonrise: 4:34 AM
Moon Transit: 11:46 AM
Moonset: 7:12 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:16 AM - 1:46 PM

Minor Periods

6:42 PM - 8:12 PM
4:04 AM - 5:34 AM

Action Rating: 5 out of 5

Saturday, May 16, 2026

Weather Forecast

Conditions: Patchy rain nearby

High Temperature: 79.5°F

Low Temperature: 65°F

Average Temperature: 72.1°F

Average Humidity: 80%

Precipitation: 0.03 in

Chance of Rain: 83%

Chance of Snow: 0%

Maximum Wind: 17.7 mph

UV Index: 2.8

Air Quality

AQI: 1 - Good

PM2.5: 8.67 μg/m3

PM10: 8.95 μg/m3

Carbon Monoxide: 185.37 μg/m3
Nitrogen Dioxide: 8.61 μg/m3
Sulphur Dioxide: 3.17 μg/m3
Ozone: 86 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:57 AM
Sunset: 8:07 PM
Daylight: 14 hrs 20 mins

Moonrise: 5:11 AM
Moon Transit: 12:46 AM
Moonset: 8:33 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:16 AM - 2:46 PM

Minor Periods

8:03 PM - 9:33 PM
4:41 AM - 6:11 AM

Action Rating: 5 out of 5

Sunday, May 17, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 84.8°F

Low Temperature: 64.7°F

Average Temperature: 73.9°F

Average Humidity: 72%

Precipitation: 0 in

Chance of Rain: 0%

Chance of Snow: 0%

Maximum Wind: 18.1 mph

UV Index: 8.8

Air Quality

AQI: 1 - Good

PM2.5: 7.11 μg/m3

PM10: 8.01 μg/m3

Carbon Monoxide: 165.77 μg/m3
Nitrogen Dioxide: 6.67 μg/m3
Sulphur Dioxide: 2.38 μg/m3
Ozone: 87.36 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:57 AM
Sunset: 8:08 PM
Daylight: 14 hrs 22 mins

Moonrise: 5:58 AM
Moon Transit: 1:50 PM
Moonset: 9:50 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:46 AM - 3:16 AM
1:20 PM - 3:50 PM

Minor Periods

9:20 PM - 10:50 PM
5:28 AM - 6:58 AM

Action Rating: 4 out of 5

Monday, May 18, 2026

Weather Forecast

Conditions: Moderate rain

High Temperature: 85.5°F

Low Temperature: 68.3°F

Average Temperature: 76.6°F

Average Humidity: 71%

Precipitation: 0.48 in

Chance of Rain: 84%

Chance of Snow: 0%

Maximum Wind: 19.5 mph

UV Index: 7.9

Air Quality

AQI: 1 - Good

PM2.5: 6.41 μg/m3

PM10: 7.56 μg/m3

Carbon Monoxide: 153.25 μg/m3
Nitrogen Dioxide: 4.88 μg/m3
Sulphur Dioxide: 2.27 μg/m3
Ozone: 81.88 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:57 AM
Sunset: 8:09 PM
Daylight: 14 hrs 24 mins

Moonrise: 6:56 AM
Moon Transit: 2:57 PM
Moonset: 10:59 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

1:52 AM - 4:22 AM
2:27 PM - 4:57 PM

Minor Periods

10:29 PM - 11:59 PM
6:26 AM - 7:56 AM

Action Rating: 3 out of 5

Tuesday, May 19, 2026

Weather Forecast

Conditions: Moderate rain

High Temperature: 75.9°F

Low Temperature: 58.5°F

Average Temperature: 69°F

Average Humidity: 80%

Precipitation: 0.22 in

Chance of Rain: 82%

Chance of Snow: 0%

Maximum Wind: 17.4 mph

UV Index: 0.1

Air Quality

AQI: 1 - Good

PM2.5: 6.62 μg/m3

PM10: 7.89 μg/m3

Carbon Monoxide: 156.08 μg/m3
Nitrogen Dioxide: 6.01 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 58.62 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:57 AM
Sunset: 8:10 PM
Daylight: 14 hrs 25 mins

Moonrise: 8:05 AM
Moon Transit: 4:03 PM
Moonset: 11:56 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

2:59 AM - 5:29 AM
3:33 PM - 6:03 PM

Minor Periods

12:00 AM - 12:00 AM
7:35 AM - 9:05 AM

Action Rating: 3 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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Water Temperature of the Mississippi River in Alton, IL

Current Water Temperature

Temperature Locations

Local Points of Interest

Nearby Water Temperatures

Weather for Alton, Illinois

Current Weather

Five Day Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Flood Warning issued May 14 at 9:21AM CDT until May 19 at 8:30PM CDT by NWS St Louis MO

Flood Warning issued May 14 at 7:36PM CDT until May 19 at 7:00PM CDT by NWS St Louis MO

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Webcams Near Alton, IL

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