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

82.9°F
Sunny
Sunny
82.7°F
81.8°F
42%
SSW 15.4 mph
25.6 mph
81.6°F
56.7°F
0 in
0%
9 mi
1011 mbar
0.4

Five Day Weather Forecast

Sunny
Mon
H: 88°F
L: 58°F
Thundery outbreaks in nearby
Tue
H: 84°F
L: 61°F
Cloudy
Wed
H: 81°F
L: 63°F
Moderate rain
Thu
H: 70°F
L: 66°F
Patchy rain nearby
Fri
H: 78°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 6.65 μg/m3
PM10: 6.85 μg/m3
Carbon Monoxide: 170.85 μg/m3
Nitrogen Dioxide: 6.85 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 1:04 PM
Sunset: 7:22 PM
Daylight: 12 hrs 34 mins
Moonrise: 5:12 PM
Moon Transit: 11:41 PM
Moonset: 5:36 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

10:47 AM - 1:17 PM
12:00 AM - 12:00 AM

Minor Periods

4:42 PM - 6:12 PM
5:06 AM - 6:36 AM

Action Rating: 3 out of 5

Monday, March 30, 2026

Weather Forecast

Sunny
88.3°F
57.6°F
71.2°F
51%
0 in
0%
0%
19 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 7.97 μg/m3
PM10: 8.19 μg/m3
Carbon Monoxide: 195.97 μg/m3
Nitrogen Dioxide: 6.73 μg/m3
Sulphur Dioxide: 3.36 μg/m3
Ozone: 100 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 1:04 PM
Sunset: 7:22 PM
Daylight: 12 hrs 34 mins
Moonrise: 5:12 PM
Moon Transit: 11:41 PM
Moonset: 5:36 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

10:47 AM - 1:17 PM
12:00 AM - 12:00 AM

Minor Periods

4:42 PM - 6:12 PM
5:06 AM - 6:36 AM

Action Rating: 3 out of 5

Tuesday, March 31, 2026

Weather Forecast

Thundery outbreaks in nearby
84°F
61.2°F
70.8°F
67%
0 in
0%
0%
17.2 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 6.79 μg/m3
PM10: 7.02 μg/m3
Carbon Monoxide: 173.73 μg/m3
Nitrogen Dioxide: 5.57 μg/m3
Sulphur Dioxide: 2.76 μg/m3
Ozone: 100.48 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:04 PM
Sunset: 7:23 PM
Daylight: 12 hrs 36 mins
Moonrise: 6:17 PM
Moon Transit: 12:00 AM
Moonset: 5:59 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:31 AM - 2:01 PM

Minor Periods

5:47 PM - 7:17 PM
5:29 AM - 6:59 AM

Action Rating: 4 out of 5

Wednesday, April 1, 2026

Weather Forecast

Cloudy
80.6°F
62.8°F
70°F
73%
0 in
0%
0%
15.9 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 5.8 μg/m3
PM10: 6.02 μg/m3
Carbon Monoxide: 184.01 μg/m3
Nitrogen Dioxide: 7.51 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 72.08 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 1:04 PM
Sunset: 7:24 PM
Daylight: 12 hrs 39 mins
Moonrise: 7:20 PM
Moon Transit: 12:23 AM
Moonset: 6:21 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:13 AM - 2:43 PM

Minor Periods

6:50 PM - 8:20 PM
5:51 AM - 7:21 AM

Action Rating: 3 out of 5

Thursday, April 2, 2026

Weather Forecast

Moderate rain
70.3°F
65.7°F
67.5°F
84%
0.24 in
84%
0%
23.3 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 4.75 μg/m3
PM10: 4.92 μg/m3
Carbon Monoxide: 168.06 μg/m3
Nitrogen Dioxide: 7.43 μg/m3
Sulphur Dioxide: 2.4 μg/m3
Ozone: 60.84 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 1:04 PM
Sunset: 7:25 PM
Daylight: 12 hrs 41 mins
Moonrise: 8:23 PM
Moon Transit: 1:06 AM
Moonset: 6:44 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

12:36 AM - 3:06 AM
12:56 AM - 3:26 PM

Minor Periods

7:53 PM - 9:23 PM
6:14 AM - 7:44 AM

Action Rating: 4 out of 5

Friday, April 3, 2026

Weather Forecast

Patchy rain nearby
77.6°F
56.8°F
66.9°F
83%
0.12 in
85%
0%
12.5 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 3.71 μg/m3
PM10: 3.96 μg/m3
Carbon Monoxide: 152.42 μg/m3
Nitrogen Dioxide: 5.89 μg/m3
Sulphur Dioxide: 2 μg/m3
Ozone: 70.31 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:03 PM
Sunset: 7:26 PM
Daylight: 12 hrs 44 mins
Moonrise: 9:26 PM
Moon Transit: 1:49 AM
Moonset: 7:07 AM
Moon Phase: Full
Moon Illumination: 96.6%

Best Times for Fishing or Hunting

Major Periods

1:19 AM - 3:49 AM
1:40 PM - 4:10 PM

Minor Periods

8:56 PM - 10:26 PM
6:37 AM - 8:07 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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