Water Temperature of the Mississippi River in Alton, IL

Current Water Temperature

37.1°F

Measurement Time: Sunday, January 11, 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

27.9°F
Clear
Clear
18.4°F
24.9°F
70%
SSW 10.3 mph
18.9 mph
16.3°F
17.1°F
0 in
0%
9 mi
1027 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 58°F
L: 23°F
Partly Cloudy
Tue
H: 58°F
L: 35°F
Overcast
Wed
H: 38°F
L: 24°F
Partly Cloudy
Thu
H: 28°F
L: 18°F
Partly Cloudy
Fri
H: 41°F
L: 25°F

Air Quality

AQI: 1 - Good
PM2.5: 8.95 μg/m3
PM10: 9.15 μg/m3
Carbon Monoxide: 208.85 μg/m3
Nitrogen Dioxide: 9.75 μg/m3
Sulphur Dioxide: 5.15 μg/m3
Ozone: 55 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 12:09 AM
Sunset: 5:00 PM
Daylight: 9 hrs 42 mins
Moonrise: 2:06 AM
Moon Transit: 7:08 AM
Moonset: 12:05 AM
Moon Phase: Last Quarter
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

6:38 AM - 9:08 AM
7:00 PM - 9:30 PM

Minor Periods

11:35 AM - 1:05 PM
1:36 AM - 3:06 AM

Action Rating: 2 out of 5

Monday, January 12, 2026

Weather Forecast

Sunny
57.7°F
23.2°F
37.4°F
61%
0 in
0%
0%
11.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 8.38 μg/m3
PM10: 8.79 μg/m3
Carbon Monoxide: 231.53 μg/m3
Nitrogen Dioxide: 19.03 μg/m3
Sulphur Dioxide: 4.29 μg/m3
Ozone: 42.08 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 12:09 AM
Sunset: 5:00 PM
Daylight: 9 hrs 42 mins
Moonrise: 2:06 AM
Moon Transit: 7:08 AM
Moonset: 12:05 AM
Moon Phase: Last Quarter
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

6:38 AM - 9:08 AM
7:00 PM - 9:30 PM

Minor Periods

11:35 AM - 1:05 PM
1:36 AM - 3:06 AM

Action Rating: 2 out of 5

Tuesday, January 13, 2026

Weather Forecast

Partly Cloudy
57.7°F
35.2°F
44.8°F
68%
0 in
0%
0%
15 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 11.1 μg/m3
PM10: 11.21 μg/m3
Carbon Monoxide: 228.05 μg/m3
Nitrogen Dioxide: 21.31 μg/m3
Sulphur Dioxide: 4.03 μg/m3
Ozone: 37.48 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 12:09 AM
Sunset: 5:01 PM
Daylight: 9 hrs 43 mins
Moonrise: 3:07 AM
Moon Transit: 7:54 AM
Moonset: 12:37 AM
Moon Phase: Waning Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

7:24 AM - 9:54 AM
7:47 PM - 10:17 PM

Minor Periods

12:07 AM - 1:37 PM
2:37 AM - 4:07 AM

Action Rating: 3 out of 5

Wednesday, January 14, 2026

Weather Forecast

Overcast
38.1°F
23.9°F
36.8°F
78%
0 in
0%
9%
21.5 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 4.71 μg/m3
PM10: 4.83 μg/m3
Carbon Monoxide: 169.69 μg/m3
Nitrogen Dioxide: 9.43 μg/m3
Sulphur Dioxide: 2.27 μg/m3
Ozone: 52.24 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 12:09 AM
Sunset: 5:02 PM
Daylight: 9 hrs 44 mins
Moonrise: 4:08 AM
Moon Transit: 8:43 AM
Moonset: 1:14 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

8:13 AM - 10:43 AM
8:37 PM - 11:07 PM

Minor Periods

12:44 AM - 2:14 PM
3:38 AM - 5:08 AM

Action Rating: 2 out of 5

Thursday, January 15, 2026

Weather Forecast

Partly Cloudy
28.1°F
18.3°F
23.3°F
49%
0 in
0%
0%
18.8 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.23 μg/m3
PM10: 3.56 μg/m3
Carbon Monoxide: 163.45 μg/m3
Nitrogen Dioxide: 7.04 μg/m3
Sulphur Dioxide: 2.53 μg/m3
Ozone: 64.76 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:10 AM
Sunset: 5:03 PM
Daylight: 9 hrs 46 mins
Moonrise: 5:07 AM
Moon Transit: 9:34 AM
Moonset: 2:00 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:04 AM - 11:34 AM

Minor Periods

1:30 PM - 3:00 PM
4:37 AM - 6:07 AM

Action Rating: 2 out of 5

Friday, January 16, 2026

Weather Forecast

Partly Cloudy
41°F
24.6°F
29.7°F
46%
0 in
0%
5%
12.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 9.15 μg/m3
PM10: 9.75 μg/m3
Carbon Monoxide: 245.85 μg/m3
Nitrogen Dioxide: 36.15 μg/m3
Sulphur Dioxide: 5.05 μg/m3
Ozone: 31 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:10 AM
Sunset: 5:04 PM
Daylight: 9 hrs 47 mins
Moonrise: 6:01 AM
Moon Transit: 10:26 AM
Moonset: 2:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:56 AM - 12:26 AM

Minor Periods

2:24 PM - 3:54 PM
5:31 AM - 7:01 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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