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

72.1°F
Sunny
Conditions: Sunny
Humidity: 29%
Feels Like: 66.7°F
Wind: SSW 4.9 mph
Wind Gusts: 4.9 mph
Pressure: 29.94 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0.2

Weather Forecast

Sunny
Tue
H: 79°F
L: 51°F
Sunny
Wed
H: 87°F
L: 57°F
Sunny
Thu
H: 83°F
L: 60°F
Sunny
Fri
H: 89°F
L: 57°F
Overcast
Sat
H: 90°F
L: 63°F

Air Quality

AQI: 1 - Good
PM2.5: 15.8 μg/m3
PM10: 16.4 μg/m3
Carbon Monoxide: 258 μg/m3
Nitrogen Dioxide: 19.7 μg/m3
Sulphur Dioxide: 4.4 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:48 AM
Sunset: 6:36 PM
Daylight: 11 hrs 34 mins
Moonrise: 2:35 AM
Moon Transit: 9:41 AM
Moonset: 4:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:11 AM - 11:41 AM

Minor Periods

4:07 PM - 5:37 PM
2:05 AM - 3:35 AM

Action Rating: 2 out of 5

Tuesday, October 6, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 63.8°F
Average Humidity: 42%
Chance of Rain: 1%
Wind: 8.3 mph
UV Index: 5

Air Quality

AQI: 1 - Good
PM2.5: 11.96 μg/m3
PM10: 12.44 μg/m3
Carbon Monoxide: 198.13 μg/m3
Nitrogen Dioxide: 14.98 μg/m3
Sulphur Dioxide: 3.17 μg/m3
Ozone: 65.29 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:48 AM
Sunset: 6:36 PM
Daylight: 11 hrs 34 mins
Moonrise: 2:35 AM
Moon Transit: 9:41 AM
Moonset: 4:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:11 AM - 11:41 AM

Minor Periods

4:07 PM - 5:37 PM
2:05 AM - 3:35 AM

Action Rating: 2 out of 5

Wednesday, October 7, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 70.3°F
Average Humidity: 44%
Chance of Rain: 1%
Wind: 10.3 mph
UV Index: 4.9

Air Quality

AQI: 1 - Good
PM2.5: 7.14 μg/m3
PM10: 7.28 μg/m3
Carbon Monoxide: 165.79 μg/m3
Nitrogen Dioxide: 11.18 μg/m3
Sulphur Dioxide: 2.44 μg/m3
Ozone: 76.46 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:48 AM
Sunset: 6:34 PM
Daylight: 11 hrs 32 mins
Moonrise: 3:45 AM
Moon Transit: 10:29 AM
Moonset: 5:02 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:59 AM - 12:29 AM

Minor Periods

4:32 PM - 6:02 PM
3:15 AM - 4:45 AM

Action Rating: 2 out of 5

Thursday, October 8, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 70°F
Average Humidity: 52%
Chance of Rain: 2%
Wind: 8.9 mph
UV Index: 5

Air Quality

AQI: 1 - Good
PM2.5: 6 μg/m3
PM10: 6.92 μg/m3
Carbon Monoxide: 157.96 μg/m3
Nitrogen Dioxide: 13.81 μg/m3
Sulphur Dioxide: 2.33 μg/m3
Ozone: 59.13 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:48 AM
Sunset: 6:33 PM
Daylight: 11 hrs 29 mins
Moonrise: 4:54 AM
Moon Transit: 11:15 AM
Moonset: 5:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:45 AM - 1:15 PM

Minor Periods

4:56 PM - 6:26 PM
4:24 AM - 5:54 AM

Action Rating: 3 out of 5

Friday, October 9, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 71°F
Average Humidity: 41%
Chance of Rain: 17%
Wind: 13.6 mph
UV Index: 5.1

Air Quality

AQI: 1 - Good
PM2.5: 11.55 μg/m3
PM10: 12.47 μg/m3
Carbon Monoxide: 169.41 μg/m3
Nitrogen Dioxide: 13.17 μg/m3
Sulphur Dioxide: 2.98 μg/m3
Ozone: 72.38 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:47 AM
Sunset: 6:31 PM
Daylight: 11 hrs 27 mins
Moonrise: 6:00 AM
Moon Transit: 12:00 AM
Moonset: 5:50 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:30 AM - 2:00 PM

Minor Periods

5:20 PM - 6:50 PM
5:30 AM - 7:00 AM

Action Rating: 4 out of 5

Saturday, October 10, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 76.2°F
Average Humidity: 40%
Chance of Rain: 5%
Wind: 15 mph
UV Index: 5

Air Quality

AQI: 1 - Good
PM2.5: 10.45 μg/m3
PM10: 10.63 μg/m3
Carbon Monoxide: 249.75 μg/m3
Nitrogen Dioxide: 13.63 μg/m3
Sulphur Dioxide: 2.08 μg/m3
Ozone: 58.13 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:47 AM
Sunset: 6:30 PM
Daylight: 11 hrs 24 mins
Moonrise: 7:06 AM
Moon Transit: 12:45 AM
Moonset: 6:15 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:15 AM - 2:45 PM

Minor Periods

5:45 PM - 7:15 PM
6:36 AM - 8:06 AM

Action Rating: 4 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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