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

49.1°F
Fog
Fog
46.1°F
51.2°F
97%
S 6.9 mph
14.6 mph
48.9°F
47°F
0 in
100%
0 mi
1002 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 70°F
L: 47°F
Cloudy
Fri
H: 48°F
L: 33°F
Sunny
Sat
H: 48°F
L: 27°F
Sunny
Sun
H: 38°F
L: 26°F
Sunny
Mon
H: 35°F
L: 20°F

Air Quality

AQI: 1 - Good
PM2.5: 8.55 μg/m3
PM10: 8.75 μg/m3
Carbon Monoxide: 255.85 μg/m3
Nitrogen Dioxide: 17.65 μg/m3
Sulphur Dioxide: 3.25 μg/m3
Ozone: 40 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:14 AM
Sunset: 5:43 PM
Daylight: 10 hrs 56 mins
Moonrise: 7:48 AM
Moon Transit: 2:00 PM
Moonset: 8:22 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

1:05 AM - 3:35 AM
1:30 PM - 4:00 PM

Minor Periods

7:52 PM - 9:22 PM
7:18 AM - 8:48 AM

Action Rating: 2 out of 5

Thursday, February 19, 2026

Weather Forecast

Patchy rain nearby
70.2°F
46.9°F
56°F
81%
0.06 in
87%
0%
16.3 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 8.39 μg/m3
PM10: 8.87 μg/m3
Carbon Monoxide: 239.53 μg/m3
Nitrogen Dioxide: 18.57 μg/m3
Sulphur Dioxide: 3.49 μg/m3
Ozone: 52.32 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:14 AM
Sunset: 5:43 PM
Daylight: 10 hrs 56 mins
Moonrise: 7:48 AM
Moon Transit: 2:00 PM
Moonset: 8:22 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

1:05 AM - 3:35 AM
1:30 PM - 4:00 PM

Minor Periods

7:52 PM - 9:22 PM
7:18 AM - 8:48 AM

Action Rating: 2 out of 5

Friday, February 20, 2026

Weather Forecast

Cloudy
48°F
33.3°F
41.9°F
63%
0 in
0%
0%
19.9 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 4.18 μg/m3
PM10: 4.36 μg/m3
Carbon Monoxide: 192.25 μg/m3
Nitrogen Dioxide: 7.83 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 67.56 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:14 AM
Sunset: 5:44 PM
Daylight: 10 hrs 58 mins
Moonrise: 8:12 AM
Moon Transit: 2:45 PM
Moonset: 9:32 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

1:51 AM - 4:21 AM
2:15 PM - 4:45 PM

Minor Periods

9:02 PM - 10:32 PM
7:42 AM - 9:12 AM

Action Rating: 2 out of 5

Saturday, February 21, 2026

Weather Forecast

Sunny
48°F
27.3°F
36.7°F
61%
0 in
0%
0%
14.8 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 4.99 μg/m3
PM10: 5.19 μg/m3
Carbon Monoxide: 199.97 μg/m3
Nitrogen Dioxide: 11.34 μg/m3
Sulphur Dioxide: 2.13 μg/m3
Ozone: 51.28 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:14 AM
Sunset: 5:45 PM
Daylight: 11 hrs 1 mins
Moonrise: 8:38 AM
Moon Transit: 3:34 PM
Moonset: 10:44 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

2:38 AM - 5:08 AM
3:04 PM - 5:34 PM

Minor Periods

10:14 PM - 11:44 PM
8:08 AM - 9:38 AM

Action Rating: 3 out of 5

Sunday, February 22, 2026

Weather Forecast

Sunny
37.7°F
25.9°F
30.6°F
49%
0 in
0%
0%
23.5 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.39 μg/m3
PM10: 3.48 μg/m3
Carbon Monoxide: 180.04 μg/m3
Nitrogen Dioxide: 5.09 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 68.08 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:14 AM
Sunset: 5:46 PM
Daylight: 11 hrs 3 mins
Moonrise: 9:08 AM
Moon Transit: 4:27 PM
Moonset: 11:59 PM
Moon Phase: Waxing Crescent
Moon Illumination: 29.1%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:57 PM - 6:27 PM

Minor Periods

12:00 AM - 12:00 AM
8:38 AM - 10:08 AM

Action Rating: 2 out of 5

Monday, February 23, 2026

Weather Forecast

Sunny
35.4°F
20.3°F
25.2°F
54%
0 in
0%
0%
15.7 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.79 μg/m3
PM10: 3.83 μg/m3
Carbon Monoxide: 174.51 μg/m3
Nitrogen Dioxide: 4.45 μg/m3
Sulphur Dioxide: 1.69 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 12:13 AM
Sunset: 5:47 PM
Daylight: 11 hrs 5 mins
Moonrise: 9:44 AM
Moon Transit: 5:23 PM
Moonset: 12:59 AM
Moon Phase: First Quarter
Moon Illumination: 39.8%

Best Times for Fishing or Hunting

Major Periods

4:23 AM - 6:53 AM
4:53 PM - 7:23 PM

Minor Periods

9:14 AM - 10:44 AM
12:00 AM - 12:00 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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