Water Temperature of the Mississippi River in Alton, IL

Current Water Temperature

50.9°F

Measurement Time: Monday, November 24, 2025, 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

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Mississippi River

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

Elevation Above Sea Level: 407 feet / 124 meters

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 (77.0 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

52.5°F
Overcast
Conditions: Overcast
Humidity: 82%
Feels Like: 48.7°F
Wind: S 11.6 mph
Wind Gusts: 16.7 mph
Pressure: 30.03 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 6 mi
UV Index: 0.8

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 51°F
L: 45°F
Moderate rain
Tue
H: 63°F
L: 48°F
Partly Cloudy
Wed
H: 46°F
L: 34°F
Sunny
Thu
H: 44°F
L: 30°F
Cloudy
Fri
H: 39°F
L: 26°F

Air Quality

AQI: 1 - Good
PM2.5: 15.95 μg/m3
PM10: 15.95 μg/m3
Carbon Monoxide: 238.85 μg/m3
Nitrogen Dioxide: 21.95 μg/m3
Sulphur Dioxide: 8.15 μg/m3
Ozone: 30 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 11:47 AM
Sunset: 4:41 PM
Daylight: 9 hrs 48 mins
Moonrise: 10:52 AM
Moon Transit: 3:28 PM
Moonset: 8:10 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

2:31 AM - 5:01 AM
2:58 PM - 5:28 PM

Minor Periods

7:40 PM - 9:10 PM
10:22 AM - 11:52 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued November 23 at 5:41PM CST until November 24 at 9:00AM CST by NWS St Louis MO

Effective: Sun November 23, 2025, 5:41 PM
Expires: Mon November 24, 2025, 8:45 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 9 AM CST Monday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued November 24 at 6:17AM CST until November 24 at 9:00AM CST by NWS St Louis MO

Effective: Mon November 24, 2025, 6:17 AM
Expires: Mon November 24, 2025, 9:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of south central, southwest, and west central Illinois and east central, northeast, and southeast Missouri. * WHEN...Until 9 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Monday, November 24, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 47.6°F
Average Humidity: 97%
Chance of Rain: 90%
Wind: 12.8 mph
UV Index: 0.2

Air Quality

AQI: 2 - Moderate
PM2.5: 17.38 μg/m3
PM10: 17.39 μg/m3
Carbon Monoxide: 285.37 μg/m3
Nitrogen Dioxide: 23.91 μg/m3
Sulphur Dioxide: 5.52 μg/m3
Ozone: 22.36 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 11:47 AM
Sunset: 4:41 PM
Daylight: 9 hrs 48 mins
Moonrise: 10:52 AM
Moon Transit: 3:28 PM
Moonset: 8:10 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

2:31 AM - 5:01 AM
2:58 PM - 5:28 PM

Minor Periods

7:40 PM - 9:10 PM
10:22 AM - 11:52 AM

Action Rating: 2 out of 5

Tuesday, November 25, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 53°F
Average Humidity: 91%
Chance of Rain: 74%
Wind: 16.3 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 13.61 μg/m3
PM10: 13.65 μg/m3
Carbon Monoxide: 209.61 μg/m3
Nitrogen Dioxide: 20.23 μg/m3
Sulphur Dioxide: 4.91 μg/m3
Ozone: 29.92 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 11:47 AM
Sunset: 4:41 PM
Daylight: 9 hrs 46 mins
Moonrise: 11:27 AM
Moon Transit: 4:17 PM
Moonset: 9:15 PM
Moon Phase: Waxing Crescent
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

3:22 AM - 5:52 AM
3:47 PM - 6:17 PM

Minor Periods

8:45 PM - 10:15 PM
10:57 AM - 12:27 AM

Action Rating: 2 out of 5

Wednesday, November 26, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 39.8°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 20.1 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 3.23 μg/m3
PM10: 3.31 μg/m3
Carbon Monoxide: 156.45 μg/m3
Nitrogen Dioxide: 8.67 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 56.44 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 11:48 AM
Sunset: 4:41 PM
Daylight: 9 hrs 45 mins
Moonrise: 11:57 AM
Moon Transit: 5:05 PM
Moonset: 10:21 PM
Moon Phase: First Quarter
Moon Illumination: 35.3%

Best Times for Fishing or Hunting

Major Periods

4:10 AM - 6:40 AM
4:35 PM - 7:05 PM

Minor Periods

9:51 PM - 11:21 PM
11:27 AM - 12:57 AM

Action Rating: 4 out of 5

Thursday, November 27, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 36.6°F
Average Humidity: 45%
Chance of Rain: 0%
Wind: 11.9 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 3.53 μg/m3
PM10: 3.82 μg/m3
Carbon Monoxide: 157.05 μg/m3
Nitrogen Dioxide: 9.04 μg/m3
Sulphur Dioxide: 2.61 μg/m3
Ozone: 51.36 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 11:48 AM
Sunset: 4:40 PM
Daylight: 9 hrs 44 mins
Moonrise: 12:24 AM
Moon Transit: 5:50 PM
Moonset: 11:27 PM
Moon Phase: First Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

4:56 AM - 7:26 AM
5:20 PM - 7:50 PM

Minor Periods

12:00 AM - 12:00 AM
11:54 AM - 1:24 PM

Action Rating: 3 out of 5

Friday, November 28, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 32.9°F
Average Humidity: 49%
Chance of Rain: 0%
Wind: 17.2 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.94 μg/m3
PM10: 5.1 μg/m3
Carbon Monoxide: 195.16 μg/m3
Nitrogen Dioxide: 11.83 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 42.54 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 11:48 AM
Sunset: 4:40 PM
Daylight: 9 hrs 42 mins
Moonrise: 12:49 AM
Moon Transit: 6:36 PM
Moonset: 12:27 AM
Moon Phase: First Quarter
Moon Illumination: 57.8%

Best Times for Fishing or Hunting

Major Periods

5:42 AM - 8:12 AM
6:06 PM - 8:36 PM

Minor Periods

12:19 AM - 1:49 PM
12:00 AM - 12:00 AM

Action Rating: 2 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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