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

57.6°F
Sunny
Sunny
55.5°F
59.9°F
63%
NE 9.6 mph
11.7 mph
59.4°F
46.6°F
0 in
0%
9 mi
1018 mbar
1.2

Five Day Weather Forecast

Patchy rain nearby
Sun
H: 76°F
L: 52°F
Sunny
Mon
H: 67°F
L: 47°F
Patchy rain nearby
Tue
H: 75°F
L: 52°F
Patchy rain nearby
Wed
H: 71°F
L: 56°F
Sunny
Thu
H: 73°F
L: 49°F

Air Quality

AQI: 1 - Good
PM2.5: 3.95 μg/m3
PM10: 4.25 μg/m3
Carbon Monoxide: 147.85 μg/m3
Nitrogen Dioxide: 2.15 μg/m3
Sulphur Dioxide: 2.05 μg/m3
Ozone: 114 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 12:57 AM
Sunset: 8:02 PM
Daylight: 14 hrs 9 mins
Moonrise: 2:25 AM
Moon Transit: 7:46 AM
Moonset: 1:17 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

7:16 AM - 9:46 AM
7:37 PM - 10:07 PM

Minor Periods

12:47 AM - 2:17 PM
1:55 AM - 3:25 AM

Action Rating: 3 out of 5

Flood Warning issued May 9 at 9:25AM CDT by NWS St Louis MO

Effective: Sat May 9, 2026, 9:25 AM
Expires: Sun May 10, 2026, 9:30 PM

...The Flood Warning continues for the following rivers in Illinois... Kaskaskia River at Carlyle. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Kaskaskia River at Carlyle. * WHEN...Until further notice. * IMPACTS...At 20.3 feet, Township roads downstream in Covington begin flooding near this height. * ADDITIONAL DETAILS... - At 9:00 AM CDT Saturday the stage was 19.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 AM CDT Saturday was 19.9 feet. - Forecast...The river is expected to remain steady above flood stage at 20.0 feet. - Flood stage is 16.5 feet.

Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx


Flood Warning issued May 9 at 9:10PM CDT by NWS St Louis MO

Effective: Sat May 9, 2026, 9:10 PM
Expires: Mon May 11, 2026, 9:15 AM

...The Flood Warning continues for the following rivers in Illinois... Kaskaskia River at Carlyle. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Kaskaskia River at Carlyle. * WHEN...Until further notice. * IMPACTS...At 20.3 feet, Township roads downstream in Covington begin flooding near this height. * ADDITIONAL DETAILS... - At 8:30 PM CDT Saturday the stage was 20.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Saturday was 20.2 feet. - Forecast...The river is expected to remain steady above flood stage at 20.2 feet. - Flood stage is 16.5 feet.

Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Sunday, May 10, 2026

Weather Forecast

Patchy rain nearby
75.7°F
52.1°F
61.3°F
64%
0.12 in
77%
0%
12.1 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 6.09 μg/m3
PM10: 6.59 μg/m3
Carbon Monoxide: 175.41 μg/m3
Nitrogen Dioxide: 9.91 μg/m3
Sulphur Dioxide: 2.32 μg/m3
Ozone: 82.92 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 12:57 AM
Sunset: 8:02 PM
Daylight: 14 hrs 9 mins
Moonrise: 2:25 AM
Moon Transit: 7:46 AM
Moonset: 1:17 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

7:16 AM - 9:46 AM
7:37 PM - 10:07 PM

Minor Periods

12:47 AM - 2:17 PM
1:55 AM - 3:25 AM

Action Rating: 3 out of 5

Monday, May 11, 2026

Weather Forecast

Sunny
67.4°F
46.7°F
58°F
61%
0 in
0%
0%
6.3 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 4.58 μg/m3
PM10: 4.9 μg/m3
Carbon Monoxide: 191.09 μg/m3
Nitrogen Dioxide: 10.89 μg/m3
Sulphur Dioxide: 2.52 μg/m3
Ozone: 79.08 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 12:56 AM
Sunset: 8:03 PM
Daylight: 14 hrs 11 mins
Moonrise: 2:50 AM
Moon Transit: 8:31 AM
Moonset: 2:23 PM
Moon Phase: Last Quarter
Moon Illumination: 16.9%

Best Times for Fishing or Hunting

Major Periods

8:01 AM - 10:31 AM
8:22 PM - 10:52 PM

Minor Periods

1:53 PM - 3:23 PM
2:20 AM - 3:50 AM

Action Rating: 3 out of 5

Tuesday, May 12, 2026

Weather Forecast

Patchy rain nearby
75.1°F
51.7°F
63.6°F
66%
0.01 in
74%
0%
12.1 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 6.91 μg/m3
PM10: 7.28 μg/m3
Carbon Monoxide: 210.77 μg/m3
Nitrogen Dioxide: 12.81 μg/m3
Sulphur Dioxide: 2.79 μg/m3
Ozone: 87.36 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 12:56 AM
Sunset: 8:04 PM
Daylight: 14 hrs 13 mins
Moonrise: 3:13 AM
Moon Transit: 8:41 PM
Moonset: 3:30 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.3%

Best Times for Fishing or Hunting

Major Periods

8:11 PM - 10:41 PM
8:11 PM - 10:41 PM

Minor Periods

3:00 PM - 4:30 PM
2:43 AM - 4:13 AM

Action Rating: 4 out of 5

Wednesday, May 13, 2026

Weather Forecast

Patchy rain nearby
70.8°F
55.7°F
63.1°F
70%
0.01 in
73%
0%
16.6 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 4.87 μg/m3
PM10: 5.38 μg/m3
Carbon Monoxide: 154.32 μg/m3
Nitrogen Dioxide: 6.62 μg/m3
Sulphur Dioxide: 1.99 μg/m3
Ozone: 93.12 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 12:56 AM
Sunset: 8:05 PM
Daylight: 14 hrs 15 mins
Moonrise: 3:37 AM
Moon Transit: 10:02 AM
Moonset: 4:40 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:32 AM - 12:02 AM

Minor Periods

4:10 PM - 5:40 PM
3:07 AM - 4:37 AM

Action Rating: 2 out of 5

Thursday, May 14, 2026

Weather Forecast

Sunny
72.6°F
48.5°F
59.4°F
66%
0 in
0%
0%
13.9 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 3.07 μg/m3
PM10: 3.1 μg/m3
Carbon Monoxide: 175.04 μg/m3
Nitrogen Dioxide: 9.91 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 61.54 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:56 AM
Sunset: 8:06 PM
Daylight: 14 hrs 17 mins
Moonrise: 4:04 AM
Moon Transit: 10:52 AM
Moonset: 5:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:24 PM - 6:54 PM
3:34 AM - 5:04 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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