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

34.7°F
Overcast
Overcast
26.6°F
34°F
90%
ENE 11 mph
15.8 mph
25.1°F
31.4°F
0 in
100%
6 mi
1025 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 39°F
L: 34°F
Patchy rain nearby
Tue
H: 41°F
L: 35°F
Moderate rain
Wed
H: 62°F
L: 43°F
Partly Cloudy
Thu
H: 68°F
L: 42°F
Moderate rain
Fri
H: 74°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 7.95 μg/m3
PM10: 8.65 μg/m3
Carbon Monoxide: 197.85 μg/m3
Nitrogen Dioxide: 7.55 μg/m3
Sulphur Dioxide: 7.75 μg/m3
Ozone: 68 μg/m3

Astronomical

Sunrise: 6:32 AM
Sun Transit: 12:12 AM
Sunset: 5:55 PM
Daylight: 11 hrs 23 mins
Moonrise: 5:19 PM
Moon Transit: 12:00 AM
Moonset: 6:08 AM
Moon Phase: Full
Moon Illumination: 99.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:07 AM - 1:37 PM

Minor Periods

4:49 PM - 6:19 PM
5:38 AM - 7:08 AM

Action Rating: 4 out of 5

Winter Weather Advisory issued March 1 at 2:53PM CST until March 2 at 6:00AM CST by NWS St Louis MO

Effective: Sun March 1, 2026, 2:53 PM
Expires: Mon March 2, 2026, 6:00 AM

* WHAT...Wet snow expected. Total snow accumulations up to one inch with a localized area of 2 to 4 inches possible. * WHERE...Portions of southwest and west central Illinois and central, east central, and northeast Missouri. * WHEN...From 6 PM this evening to 6 AM CST Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Monday morning commute.

Slow down and use caution while traveling. In Illinois, the latest road conditions can be obtained at www.gettingaroundillinois.com. In Missouri, the latest road conditions can be obtained at traveler.modot.org/map or by calling 1-888-275-6636.
Monday, March 2, 2026

Weather Forecast

Patchy rain nearby
39.4°F
33.8°F
36.2°F
90%
0.11 in
89%
7%
11.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 8.21 μg/m3
PM10: 8.64 μg/m3
Carbon Monoxide: 196.53 μg/m3
Nitrogen Dioxide: 7.59 μg/m3
Sulphur Dioxide: 5.38 μg/m3
Ozone: 65 μg/m3

Astronomical

Sunrise: 6:32 AM
Sun Transit: 12:12 AM
Sunset: 5:55 PM
Daylight: 11 hrs 23 mins
Moonrise: 5:19 PM
Moon Transit: 12:00 AM
Moonset: 6:08 AM
Moon Phase: Full
Moon Illumination: 99.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:07 AM - 1:37 PM

Minor Periods

4:49 PM - 6:19 PM
5:38 AM - 7:08 AM

Action Rating: 4 out of 5

Tuesday, March 3, 2026

Weather Forecast

Patchy rain nearby
41.1°F
35.4°F
39°F
98%
0.16 in
82%
0%
13.2 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 17.69 μg/m3
PM10: 18.19 μg/m3
Carbon Monoxide: 236.89 μg/m3
Nitrogen Dioxide: 15.7 μg/m3
Sulphur Dioxide: 8.27 μg/m3
Ozone: 44.88 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:12 AM
Sunset: 5:56 PM
Daylight: 11 hrs 25 mins
Moonrise: 6:26 PM
Moon Transit: 12:01 AM
Moonset: 6:33 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:52 AM - 2:22 PM

Minor Periods

5:56 PM - 7:26 PM
6:03 AM - 7:33 AM

Action Rating: 5 out of 5

Wednesday, March 4, 2026

Weather Forecast

Moderate rain
61.7°F
42.5°F
50.1°F
89%
0.37 in
89%
0%
18.6 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 15.74 μg/m3
PM10: 15.91 μg/m3
Carbon Monoxide: 258.13 μg/m3
Nitrogen Dioxide: 17.32 μg/m3
Sulphur Dioxide: 2.79 μg/m3
Ozone: 35.92 μg/m3

Astronomical

Sunrise: 6:29 AM
Sun Transit: 12:12 AM
Sunset: 5:57 PM
Daylight: 11 hrs 28 mins
Moonrise: 7:30 PM
Moon Transit: 12:46 AM
Moonset: 6:56 AM
Moon Phase: Full
Moon Illumination: 98.2%

Best Times for Fishing or Hunting

Major Periods

12:16 AM - 2:46 AM
12:36 AM - 3:06 PM

Minor Periods

7:00 PM - 8:30 PM
6:26 AM - 7:56 AM

Action Rating: 4 out of 5

Thursday, March 5, 2026

Weather Forecast

Partly Cloudy
67.9°F
42.3°F
54.6°F
77%
0 in
0%
0%
10.7 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.13 μg/m3
PM10: 7.33 μg/m3
Carbon Monoxide: 227.95 μg/m3
Nitrogen Dioxide: 12.92 μg/m3
Sulphur Dioxide: 3 μg/m3
Ozone: 54.44 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 12:12 AM
Sunset: 5:58 PM
Daylight: 11 hrs 30 mins
Moonrise: 8:34 PM
Moon Transit: 1:29 AM
Moonset: 7:18 AM
Moon Phase: Full
Moon Illumination: 94.0%

Best Times for Fishing or Hunting

Major Periods

12:59 AM - 3:29 AM
1:19 PM - 3:49 PM

Minor Periods

8:04 PM - 9:34 PM
6:48 AM - 8:18 AM

Action Rating: 4 out of 5

Friday, March 6, 2026

Weather Forecast

Moderate rain
74°F
55.8°F
63°F
88%
0.55 in
80%
0%
19 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 7.75 μg/m3
PM10: 7.9 μg/m3
Carbon Monoxide: 216.77 μg/m3
Nitrogen Dioxide: 19.26 μg/m3
Sulphur Dioxide: 3.2 μg/m3
Ozone: 40.38 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 12:11 AM
Sunset: 5:59 PM
Daylight: 11 hrs 33 mins
Moonrise: 9:37 PM
Moon Transit: 2:11 AM
Moonset: 7:40 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.6%

Best Times for Fishing or Hunting

Major Periods

1:41 AM - 4:11 AM
2:02 PM - 4:32 PM

Minor Periods

9:07 PM - 10:37 PM
7:10 AM - 8:40 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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