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

48.6°F
Light rain
Light rain
44°F
51.2°F
96%
WSW 10.7 mph
21.7 mph
49.4°F
50.6°F
0.11 in
100%
4 mi
1015 mbar
0

Five Day Weather Forecast

Heavy rain
Thu
H: 60°F
L: 51°F
Patchy rain nearby
Fri
H: 69°F
L: 52°F
Moderate rain
Sat
H: 62°F
L: 44°F
Partly Cloudy
Sun
H: 63°F
L: 44°F
Patchy rain nearby
Mon
H: 75°F
L: 48°F

Air Quality

AQI: 1 - Good
PM2.5: 6.75 μg/m3
PM10: 6.95 μg/m3
Carbon Monoxide: 218.85 μg/m3
Nitrogen Dioxide: 8.45 μg/m3
Sulphur Dioxide: 3.35 μg/m3
Ozone: 62 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

Dense Fog Advisory issued March 4 at 8:42PM CST until March 5 at 6:00AM CST by NWS St Louis MO

Effective: Wed March 4, 2026, 8:42 PM
Expires: Thu March 5, 2026, 6:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of south central, southwest, and west central Illinois and central and northeast Missouri. * WHEN...Until 6 AM CST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Thursday, March 5, 2026

Weather Forecast

Heavy rain
60.3°F
50.7°F
53°F
95%
1.47 in
89%
0%
11.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.59 μg/m3
PM10: 7.85 μg/m3
Carbon Monoxide: 245.21 μg/m3
Nitrogen Dioxide: 16.91 μg/m3
Sulphur Dioxide: 3.12 μg/m3
Ozone: 48.32 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

Patchy rain nearby
68.9°F
52.3°F
61.8°F
91%
0.06 in
82%
0%
19.9 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 8.09 μg/m3
PM10: 8.35 μg/m3
Carbon Monoxide: 209.73 μg/m3
Nitrogen Dioxide: 13.18 μg/m3
Sulphur Dioxide: 2.71 μg/m3
Ozone: 51.64 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

Saturday, March 7, 2026

Weather Forecast

Moderate rain
61.7°F
43.5°F
55.6°F
76%
0.54 in
86%
0%
19.5 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 3.78 μg/m3
PM10: 3.87 μg/m3
Carbon Monoxide: 159.41 μg/m3
Nitrogen Dioxide: 7.11 μg/m3
Sulphur Dioxide: 2.34 μg/m3
Ozone: 56.44 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:00 AM
Sunset: 6:00 PM
Daylight: 11 hrs 36 mins
Moonrise: 10:41 PM
Moon Transit: 2:55 AM
Moonset: 8:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.2%

Best Times for Fishing or Hunting

Major Periods

2:25 AM - 4:55 AM
2:46 PM - 5:16 PM

Minor Periods

10:11 PM - 11:41 PM
7:36 AM - 9:06 AM

Action Rating: 2 out of 5

Sunday, March 8, 2026

Weather Forecast

Partly Cloudy
63.1°F
44.4°F
52°F
63%
0 in
0%
0%
8.3 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 6.18 μg/m3
PM10: 6.52 μg/m3
Carbon Monoxide: 223.32 μg/m3
Nitrogen Dioxide: 14.11 μg/m3
Sulphur Dioxide: 3.26 μg/m3
Ozone: 56.52 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 12:00 AM
Sunset: 6:01 PM
Daylight: 11 hrs 38 mins
Moonrise: 11:43 PM
Moon Transit: 3:40 AM
Moonset: 8:34 AM
Moon Phase: Waning Gibbous
Moon Illumination: 69.3%

Best Times for Fishing or Hunting

Major Periods

3:10 AM - 5:40 AM
3:32 PM - 6:02 PM

Minor Periods

12:00 AM - 12:00 AM
8:04 AM - 9:34 AM

Action Rating: 3 out of 5

Monday, March 9, 2026

Weather Forecast

Patchy rain nearby
75.4°F
47.5°F
57.4°F
81%
0.02 in
88%
0%
17.9 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 6.63 μg/m3
PM10: 6.98 μg/m3
Carbon Monoxide: 251.2 μg/m3
Nitrogen Dioxide: 19.78 μg/m3
Sulphur Dioxide: 3.2 μg/m3
Ozone: 54.33 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 12:00 AM
Sunset: 6:02 PM
Daylight: 11 hrs 41 mins
Moonrise: 12:43 AM
Moon Transit: 4:27 AM
Moonset: 9:07 AM
Moon Phase: Waning Gibbous
Moon Illumination: 58.5%

Best Times for Fishing or Hunting

Major Periods

3:57 AM - 6:27 AM
4:20 PM - 6:50 PM

Minor Periods

8:37 AM - 10:07 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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