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

31.1°F
Clear
Clear
25.1°F
32.1°F
81%
WNW 6 mph
11.1 mph
26.8°F
27.3°F
0 in
0%
9 mi
1026 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 58°F
L: 32°F
Cloudy
Fri
H: 56°F
L: 38°F
Overcast
Sat
H: 48°F
L: 32°F
Moderate rain
Sun
H: 60°F
L: 32°F
Blowing snow
Mon
H: 37°F
L: 19°F

Air Quality

AQI: 1 - Good
PM2.5: 5.85 μg/m3
PM10: 7.15 μg/m3
Carbon Monoxide: 183.85 μg/m3
Nitrogen Dioxide: 7.25 μg/m3
Sulphur Dioxide: 3.15 μg/m3
Ozone: 78 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 12:00 AM
Sunset: 7:05 PM
Daylight: 11 hrs 49 mins
Moonrise: 3:34 AM
Moon Transit: 8:00 AM
Moonset: 12:28 AM
Moon Phase: Last Quarter
Moon Illumination: 25.6%

Best Times for Fishing or Hunting

Major Periods

7:30 AM - 10:00 AM
7:54 PM - 10:24 PM

Minor Periods

11:58 AM - 1:28 PM
3:04 AM - 4:34 AM

Action Rating: 3 out of 5

Flood Warning issued March 11 at 10:56AM CDT by NWS St Louis MO

Effective: Wed March 11, 2026, 10:56 AM
Expires: Thu March 12, 2026, 11:00 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 16.5 feet, Near this height, downstream agricultural fields begin flooding. * ADDITIONAL DETAILS... - At 10:30 AM CDT Wednesday the stage was 16.6 feet. - Forecast...The river is expected to remain steady above flood stage at 16.6 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 March 11 at 9:21PM CDT until March 19 at 7:00AM CDT by NWS St Louis MO

Effective: Wed March 11, 2026, 9:21 PM
Expires: Fri March 13, 2026, 9:30 AM

...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 Thursday, March 19. * IMPACTS...At 16.5 feet, Near this height, downstream agricultural fields begin flooding. * ADDITIONAL DETAILS... - At 9:00 PM CDT Wednesday the stage was 16.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Wednesday was 16.6 feet. - Forecast...The river is expected to fall below flood stage Wednesday, March 18 and continue falling to 15.1 feet Wednesday, March 18. - 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
Thursday, March 12, 2026

Weather Forecast

Sunny
58.1°F
31.6°F
42.8°F
64%
0 in
0%
0%
21 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 4.22 μg/m3
PM10: 5.05 μg/m3
Carbon Monoxide: 176.49 μg/m3
Nitrogen Dioxide: 5.59 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 82.52 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 12:00 AM
Sunset: 7:05 PM
Daylight: 11 hrs 49 mins
Moonrise: 3:34 AM
Moon Transit: 8:00 AM
Moonset: 12:28 AM
Moon Phase: Last Quarter
Moon Illumination: 25.6%

Best Times for Fishing or Hunting

Major Periods

7:30 AM - 10:00 AM
7:54 PM - 10:24 PM

Minor Periods

11:58 AM - 1:28 PM
3:04 AM - 4:34 AM

Action Rating: 3 out of 5

Friday, March 13, 2026

Weather Forecast

Cloudy
55.6°F
37.8°F
46.6°F
57%
0 in
0%
0%
23.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.05 μg/m3
PM10: 3.31 μg/m3
Carbon Monoxide: 159.53 μg/m3
Nitrogen Dioxide: 5.97 μg/m3
Sulphur Dioxide: 2.69 μg/m3
Ozone: 92.92 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 12:00 AM
Sunset: 7:06 PM
Daylight: 11 hrs 51 mins
Moonrise: 4:20 AM
Moon Transit: 8:51 AM
Moonset: 1:27 PM
Moon Phase: Waning Crescent
Moon Illumination: 16.4%

Best Times for Fishing or Hunting

Major Periods

8:21 AM - 10:51 AM
8:46 PM - 11:16 PM

Minor Periods

12:57 AM - 2:27 PM
3:50 AM - 5:20 AM

Action Rating: 2 out of 5

Saturday, March 14, 2026

Weather Forecast

Overcast
48.4°F
31.6°F
40.7°F
55%
0 in
0%
0%
15.4 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 4.47 μg/m3
PM10: 4.58 μg/m3
Carbon Monoxide: 178.21 μg/m3
Nitrogen Dioxide: 8.71 μg/m3
Sulphur Dioxide: 3.75 μg/m3
Ozone: 69.64 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 12:00 AM
Sunset: 7:07 PM
Daylight: 11 hrs 54 mins
Moonrise: 4:58 AM
Moon Transit: 9:42 AM
Moonset: 2:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:12 AM - 11:42 AM

Minor Periods

2:03 PM - 3:33 PM
4:28 AM - 5:58 AM

Action Rating: 2 out of 5

Sunday, March 15, 2026

Weather Forecast

Moderate rain
59.7°F
32.1°F
48.8°F
82%
0.34 in
85%
3%
25.5 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 5.58 μg/m3
PM10: 5.84 μg/m3
Carbon Monoxide: 170.39 μg/m3
Nitrogen Dioxide: 8.35 μg/m3
Sulphur Dioxide: 4.73 μg/m3
Ozone: 76.16 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

Blowing snow
37.2°F
19.2°F
26.3°F
64%
0.01 in
85%
33%
27.1 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.98 μg/m3
PM10: 3.51 μg/m3
Carbon Monoxide: 178.97 μg/m3
Nitrogen Dioxide: 4.67 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 85.08 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

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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