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

45°F
Moderate rain
Moderate rain
39.7°F
42.6°F
93%
E 10.3 mph
15.8 mph
36.3°F
41.5°F
0.65 in
100%
4 mi
1013 mbar
0

Five Day Weather Forecast

Heavy rain
Sun
H: 47°F
L: 41°F
Overcast
Mon
H: 53°F
L: 39°F
Partly Cloudy
Tue
H: 59°F
L: 44°F
Partly Cloudy
Wed
H: 67°F
L: 56°F
Patchy rain nearby
Thu
H: 61°F
L: 46°F

Air Quality

PM2.5: 13.05 μg/m3
PM10: 13.15 μg/m3
Carbon Monoxide: 207.85 μg/m3
Nitrogen Dioxide: 8.15 μg/m3
Sulphur Dioxide: 6.95 μg/m3
Ozone: 50 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:14 AM
Sunset: 5:38 PM
Daylight: 10 hrs 46 mins
Moonrise: 6:02 AM
Moon Transit: 10:52 AM
Moonset: 3:50 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:22 AM - 12:52 AM

Minor Periods

3:20 PM - 4:50 PM
5:32 AM - 7:02 AM

Action Rating: 3 out of 5

Sunday, February 15, 2026

Weather Forecast

Heavy rain
46.9°F
41°F
43.4°F
94%
1.13 in
75%
0%
13 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 9.85 μg/m3
PM10: 10.02 μg/m3
Carbon Monoxide: 210.53 μg/m3
Nitrogen Dioxide: 10.07 μg/m3
Sulphur Dioxide: 6.23 μg/m3
Ozone: 60.64 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:14 AM
Sunset: 5:38 PM
Daylight: 10 hrs 46 mins
Moonrise: 6:02 AM
Moon Transit: 10:52 AM
Moonset: 3:50 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:22 AM - 12:52 AM

Minor Periods

3:20 PM - 4:50 PM
5:32 AM - 7:02 AM

Action Rating: 3 out of 5

Monday, February 16, 2026

Weather Forecast

Overcast
52.7°F
39.4°F
44.8°F
92%
0 in
0%
0%
8.3 mph
0.7


Air Quality

AQI: 2 - Moderate
PM2.5: 17.52 μg/m3
PM10: 18.06 μg/m3
Carbon Monoxide: 410.89 μg/m3
Nitrogen Dioxide: 38.91 μg/m3
Sulphur Dioxide: 6.7 μg/m3
Ozone: 36.92 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:14 AM
Sunset: 5:39 PM
Daylight: 10 hrs 49 mins
Moonrise: 6:33 AM
Moon Transit: 11:41 AM
Moonset: 4:58 PM
Moon Phase: New
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:11 AM - 1:41 PM

Minor Periods

4:28 PM - 5:58 PM
6:03 AM - 7:33 AM

Action Rating: 4 out of 5

Tuesday, February 17, 2026

Weather Forecast

Partly Cloudy
59.1°F
44.1°F
52.4°F
81%
0 in
0%
0%
20.8 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 10.03 μg/m3
PM10: 10.14 μg/m3
Carbon Monoxide: 272.98 μg/m3
Nitrogen Dioxide: 11.22 μg/m3
Sulphur Dioxide: 5.98 μg/m3
Ozone: 64.48 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:14 AM
Sunset: 5:40 PM
Daylight: 10 hrs 51 mins
Moonrise: 7:00 AM
Moon Transit: 12:27 AM
Moonset: 6:06 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:57 AM - 2:27 PM

Minor Periods

5:36 PM - 7:06 PM
6:30 AM - 8:00 AM

Action Rating: 5 out of 5

Wednesday, February 18, 2026

Weather Forecast

Partly Cloudy
66.9°F
56.2°F
60.2°F
57%
0 in
0%
0%
18.1 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 6.73 μg/m3
PM10: 6.81 μg/m3
Carbon Monoxide: 200.02 μg/m3
Nitrogen Dioxide: 6.63 μg/m3
Sulphur Dioxide: 3.67 μg/m3
Ozone: 94.85 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:14 AM
Sunset: 5:41 PM
Daylight: 10 hrs 53 mins
Moonrise: 7:24 AM
Moon Transit: 1:13 PM
Moonset: 7:13 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
12:43 AM - 3:13 PM

Minor Periods

6:43 PM - 8:13 PM
6:54 AM - 8:24 AM

Action Rating: 4 out of 5

Thursday, February 19, 2026

Weather Forecast

Patchy rain nearby
60.7°F
45.8°F
54.8°F
60%
0 in
64%
0%
21.9 mph
3


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 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

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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