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

48.4°F
Sunny
Sunny
46.5°F
49.4°F
81%
SW 4.7 mph
6.4 mph
47.7°F
41.1°F
0 in
0%
9 mi
1018 mbar
0.8

Five Day Weather Forecast

Sunny
Thu
H: 68°F
L: 41°F
Moderate rain
Fri
H: 75°F
L: 47°F
Sunny
Sat
H: 74°F
L: 49°F
Patchy rain nearby
Sun
H: 68°F
L: 49°F
Sunny
Mon
H: 67°F
L: 43°F

Air Quality

AQI: 1 - Good
PM2.5: 9.95 μg/m3
PM10: 11.45 μg/m3
Carbon Monoxide: 153.85 μg/m3
Nitrogen Dioxide: 3.55 μg/m3
Sulphur Dioxide: 3.05 μg/m3
Ozone: 103 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 12:57 AM
Sunset: 7:59 PM
Daylight: 14 hrs 3 mins
Moonrise: 12:51 AM
Moon Transit: 5:26 AM
Moonset: 10:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

4:56 AM - 7:26 AM
5:19 PM - 7:49 PM

Minor Periods

9:36 AM - 11:06 AM
12:21 AM - 1:51 AM

Action Rating: 3 out of 5

Flood Warning issued May 6 at 10:10AM CDT until May 10 at 1:00PM CDT by NWS St Louis MO

Effective: Wed May 6, 2026, 10:10 AM
Expires: Thu May 7, 2026, 10:15 PM

...The Flood Warning is extended for the following river in Illinois... Illinois River at Hardin. 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...Illinois River at Hardin. * WHEN...Until Sunday afternoon. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land begins. * ADDITIONAL DETAILS... - At 9:30 AM CDT Wednesday the stage was 25.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 AM CDT Wednesday was 25.5 feet. - Forecast...The river is expected to rise to a crest of 25.5 feet tomorrow morning. It will then fall below flood stage Saturday morning. - Flood stage is 25.0 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 6 at 10:00PM CDT until May 8 at 7:00PM CDT by NWS St Louis MO

Effective: Wed May 6, 2026, 10:00 PM
Expires: Fri May 8, 2026, 10:00 AM

...The Flood Warning continues for the following rivers in Illinois... Illinois River at Hardin. 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...Illinois River at Hardin. * WHEN...Until Friday evening. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land occurs. * ADDITIONAL DETAILS... - At 9:30 PM CDT Wednesday the stage was 25.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 PM CDT Wednesday was 25.3 feet. - Forecast...The river is expected to continue slowly falling tonight. It will then fall below flood stage early tomorrow afternoon. - Flood stage is 25.0 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, May 7, 2026

Weather Forecast

Sunny
67.6°F
41.4°F
54°F
62%
0 in
0%
0%
10.1 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 9.83 μg/m3
PM10: 10.83 μg/m3
Carbon Monoxide: 179.81 μg/m3
Nitrogen Dioxide: 14.59 μg/m3
Sulphur Dioxide: 2.28 μg/m3
Ozone: 67.6 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 12:57 AM
Sunset: 7:59 PM
Daylight: 14 hrs 3 mins
Moonrise: 12:51 AM
Moon Transit: 5:26 AM
Moonset: 10:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

4:56 AM - 7:26 AM
5:19 PM - 7:49 PM

Minor Periods

9:36 AM - 11:06 AM
12:21 AM - 1:51 AM

Action Rating: 3 out of 5

Friday, May 8, 2026

Weather Forecast

Moderate rain
74.7°F
47.4°F
58.3°F
74%
0.33 in
84%
0%
17.9 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 7.89 μg/m3
PM10: 8.35 μg/m3
Carbon Monoxide: 199.09 μg/m3
Nitrogen Dioxide: 10.62 μg/m3
Sulphur Dioxide: 2.82 μg/m3
Ozone: 79.32 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 12:57 AM
Sunset: 8:00 PM
Daylight: 14 hrs 5 mins
Moonrise: 1:27 AM
Moon Transit: 6:14 AM
Moonset: 11:08 AM
Moon Phase: Last Quarter
Moon Illumination: 47.9%

Best Times for Fishing or Hunting

Major Periods

5:44 AM - 8:14 AM
6:07 PM - 8:37 PM

Minor Periods

10:38 AM - 12:08 AM
12:57 AM - 2:27 AM

Action Rating: 3 out of 5

Saturday, May 9, 2026

Weather Forecast

Sunny
74.1°F
48.9°F
61.5°F
71%
0 in
0%
0%
9.6 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 10.07 μg/m3
PM10: 11.01 μg/m3
Carbon Monoxide: 193.89 μg/m3
Nitrogen Dioxide: 14.37 μg/m3
Sulphur Dioxide: 2.68 μg/m3
Ozone: 68.4 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 12:57 AM
Sunset: 8:01 PM
Daylight: 14 hrs 7 mins
Moonrise: 1:58 AM
Moon Transit: 7:01 AM
Moonset: 12:13 AM
Moon Phase: Last Quarter
Moon Illumination: 36.7%

Best Times for Fishing or Hunting

Major Periods

6:31 AM - 9:01 AM
6:53 PM - 9:23 PM

Minor Periods

11:43 AM - 1:13 PM
1:28 AM - 2:58 AM

Action Rating: 2 out of 5

Sunday, May 10, 2026

Weather Forecast

Patchy rain nearby
68.2°F
48.9°F
57.2°F
81%
0.04 in
86%
0%
20.6 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 8.45 μg/m3
PM10: 9.34 μg/m3
Carbon Monoxide: 197.37 μg/m3
Nitrogen Dioxide: 10.45 μg/m3
Sulphur Dioxide: 2.87 μg/m3
Ozone: 81.04 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
66.8°F
43.1°F
52.2°F
65%
0 in
0%
0%
11.4 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 3.79 μg/m3
PM10: 3.92 μg/m3
Carbon Monoxide: 158.7 μg/m3
Nitrogen Dioxide: 9.29 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 68.62 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

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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