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

55.8°F
Clear
Clear
51.2°F
54.9°F
74%
S 19.7 mph
31.9 mph
51.3°F
48.5°F
0 in
0%
9 mi
1001 mbar
0

Five Day Weather Forecast

Moderate rain
Sun
H: 69°F
L: 34°F
Overcast
Mon
H: 33°F
L: 17°F
Cloudy
Tue
H: 39°F
L: 18°F
Cloudy
Wed
H: 61°F
L: 33°F
Sunny
Thu
H: 62°F
L: 36°F

Air Quality

AQI: 1 - Good
PM2.5: 4.15 μg/m3
PM10: 4.55 μg/m3
Carbon Monoxide: 163.85 μg/m3
Nitrogen Dioxide: 5.65 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:00 AM
Sunset: 7:08 PM
Daylight: 11 hrs 56 mins
Moonrise: 5:31 AM
Moon Transit: 10:31 AM
Moonset: 3:39 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:01 AM - 12:31 AM

Minor Periods

3:09 PM - 4:39 PM
5:01 AM - 6:31 AM

Action Rating: 2 out of 5

Wind Advisory issued March 14 at 10:45AM CDT until March 16 at 12:00PM CDT by NWS St Louis MO

Effective: Sat March 14, 2026, 10:45 AM
Expires: Sun March 15, 2026, 1:45 AM

* WHAT...South winds shifting to west 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...From 10 AM Sunday to noon CDT Monday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.


Flood Warning issued March 14 at 8:48AM CDT by NWS St Louis MO

Effective: Sat March 14, 2026, 8:48 AM
Expires: Sun March 15, 2026, 9:00 PM

...The Flood Warning continues for the following river in Illinois... Kaskaskia River at Carlyle. River forecasts are based on observed precipitation and forecast precipitation for the next 48 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 AM CDT Saturday the stage was 19.8 feet. - Forecast...The river is expected to remain near 19.7 feet into the middle of next week. - 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 March 14 at 8:31PM CDT by NWS St Louis MO

Effective: Sat March 14, 2026, 8:31 PM
Expires: Mon March 16, 2026, 8:45 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 48 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 8:00 PM CDT Saturday the stage was 20.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 PM CDT Saturday was 20.2 feet. - Forecast...The river is expected to rise to a crest of 20.2 feet just after midnight tonight. - 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, March 15, 2026

Weather Forecast

Moderate rain
68.5°F
33.6°F
53.8°F
77%
0.34 in
80%
0%
28 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 4.67 μg/m3
PM10: 4.85 μg/m3
Carbon Monoxide: 175.17 μg/m3
Nitrogen Dioxide: 6.44 μg/m3
Sulphur Dioxide: 2.97 μg/m3
Ozone: 96.04 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:00 AM
Sunset: 7:08 PM
Daylight: 11 hrs 56 mins
Moonrise: 5:31 AM
Moon Transit: 10:31 AM
Moonset: 3:39 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:01 AM - 12:31 AM

Minor Periods

3:09 PM - 4:39 PM
5:01 AM - 6:31 AM

Action Rating: 2 out of 5

Monday, March 16, 2026

Weather Forecast

Overcast
32.5°F
17.1°F
26.1°F
62%
0 in
0%
0%
26.2 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 3.29 μg/m3
PM10: 3.97 μg/m3
Carbon Monoxide: 188.01 μg/m3
Nitrogen Dioxide: 3.7 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 83.04 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:00 AM
Sunset: 7:09 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:00 AM
Moon Transit: 11:18 AM
Moonset: 4:47 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:48 AM - 1:18 PM

Minor Periods

4:17 PM - 5:47 PM
5:30 AM - 7:00 AM

Action Rating: 3 out of 5

Tuesday, March 17, 2026

Weather Forecast

Cloudy
39°F
17.6°F
28.1°F
38%
0 in
0%
0%
17.2 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.54 μg/m3
PM10: 4.08 μg/m3
Carbon Monoxide: 186.89 μg/m3
Nitrogen Dioxide: 5.29 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 85.24 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:00 AM
Sunset: 7:10 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:26 AM
Moon Transit: 12:05 AM
Moonset: 5:55 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:35 AM - 2:05 PM

Minor Periods

5:25 PM - 6:55 PM
5:56 AM - 7:26 AM

Action Rating: 5 out of 5

Wednesday, March 18, 2026

Weather Forecast

Cloudy
60.5°F
33.4°F
46.2°F
63%
0 in
0%
0%
18.6 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 8.21 μg/m3
PM10: 9.05 μg/m3
Carbon Monoxide: 211.54 μg/m3
Nitrogen Dioxide: 8.99 μg/m3
Sulphur Dioxide: 3.54 μg/m3
Ozone: 77.04 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:00 AM
Sunset: 7:11 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:50 AM
Moon Transit: 12:51 AM
Moonset: 7:04 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:21 AM - 2:51 PM

Minor Periods

6:34 PM - 8:04 PM
6:20 AM - 7:50 AM

Action Rating: 3 out of 5

Thursday, March 19, 2026

Weather Forecast

Sunny
62.3°F
35.6°F
44.3°F
79%
0 in
0%
0%
6.9 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 9.91 μg/m3
PM10: 10.39 μg/m3
Carbon Monoxide: 241.02 μg/m3
Nitrogen Dioxide: 10.8 μg/m3
Sulphur Dioxide: 3.36 μg/m3
Ozone: 69.54 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:00 AM
Sunset: 7:12 PM
Daylight: 12 hrs 6 mins
Moonrise: 7:14 AM
Moon Transit: 12:31 AM
Moonset: 8:16 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
12:01 AM - 2:31 AM

Minor Periods

7:46 PM - 9:16 PM
6:44 AM - 8:14 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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