Water Temperature of the Mississippi River in Alton, IL

Current Water Temperature

39.5°F

Measurement Time: Sunday, January 21, 2024, 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

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Mississippi River

Station Name: Alton 2SE - Melvin Price L&D
Data Source: USGS

Elevation Above Sea Level: 407 feet / 124 meters

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 (77.0 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

84.4°F
Sunny
Conditions: Sunny
Humidity: 66%
Feels Like: 90.5°F
Wind: E 6 mph
Wind Gusts: 9 mph
Pressure: 30.03 in
Precipitation: 0 in
Cloud Cover: 25%
Visibility: 9 mi
UV Index: 2.1

Five Day Weather Forecast

Partly Cloudy
Mon
H: 87°F
L: 71°F
Partly Cloudy
Tue
H: 90°F
L: 72°F
Moderate rain
Wed
H: 91°F
L: 73°F
Heavy rain
Thu
H: 87°F
L: 68°F
Patchy rain nearby
Fri
H: 86°F
L: 72°F

Air Quality

AQI: 2 - Moderate
PM2.5: 26.09 μg/m3
PM10: 26.46 μg/m3
Carbon Monoxide: 553.15 μg/m3
Nitrogen Dioxide: 87.69 μg/m3
Sulphur Dioxide: 2.96 μg/m3
Ozone: 53 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:06 PM
Sunset: 8:26 PM
Daylight: 14 hrs 39 mins
Moonrise: 10:56 PM
Moon Transit: 4:00 AM
Moonset: 9:40 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:52 PM - 6:22 PM

Minor Periods

10:26 PM - 11:56 PM
9:10 AM - 10:40 AM

Action Rating: 3 out of 5

Flood Warning issued July 14 at 10:35AM CDT until July 20 at 7:00PM CDT by NWS St Louis MO

Effective: Mon July 14, 2025, 10:35 AM
Expires: Tue July 15, 2025, 10:45 PM

...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Hannibal. Mississippi River at Louisiana. Mississippi River at Clarksville. 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...Mississippi River at Clarksville. * WHEN...Until Sunday evening. * IMPACTS...At 25.5 feet, State Route P east of Elsberry begins flooding just east of the levee. * ADDITIONAL DETAILS... - At 10:00 AM CDT Monday the stage was 25.4 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Monday was 25.4 feet. - Forecast...The river is expected to rise to a crest of 25.5 feet this evening. It will then fall below flood stage early Saturday afternoon. - Flood stage is 25.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Monday, July 14, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 77.6°F
Average Humidity: 87%
Chance of Rain: 0%
Wind: 6 mph
UV Index: 2.3

Air Quality

AQI: 1 - Good
PM2.5: 14.1 μg/m3
PM10: 14.86 μg/m3
Carbon Monoxide: 401.45 μg/m3
Nitrogen Dioxide: 22.33 μg/m3
Sulphur Dioxide: 4.08 μg/m3
Ozone: 87.44 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:06 PM
Sunset: 8:26 PM
Daylight: 14 hrs 39 mins
Moonrise: 10:56 PM
Moon Transit: 4:00 AM
Moonset: 9:40 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:52 PM - 6:22 PM

Minor Periods

10:26 PM - 11:56 PM
9:10 AM - 10:40 AM

Action Rating: 3 out of 5

Tuesday, July 15, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 79.5°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 6.9 mph
UV Index: 2.3

Air Quality

AQI: 2 - Moderate
PM2.5: 23.54 μg/m3
PM10: 23.87 μg/m3
Carbon Monoxide: 477.23 μg/m3
Nitrogen Dioxide: 41.11 μg/m3
Sulphur Dioxide: 5.04 μg/m3
Ozone: 91.84 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:06 PM
Sunset: 8:25 PM
Daylight: 14 hrs 37 mins
Moonrise: 11:20 PM
Moon Transit: 4:47 AM
Moonset: 10:49 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
12:00 AM - 12:00 AM

Minor Periods

12:00 AM - 12:00 AM
10:19 AM - 11:49 AM

Action Rating: 2 out of 5

Wednesday, July 16, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 81.3°F
Average Humidity: 83%
Chance of Rain: 88%
Wind: 8.7 mph
UV Index: 2.7

Air Quality

AQI: 1 - Good
PM2.5: 14.59 μg/m3
PM10: 15.04 μg/m3
Carbon Monoxide: 410.92 μg/m3
Nitrogen Dioxide: 18.39 μg/m3
Sulphur Dioxide: 5.99 μg/m3
Ozone: 91.56 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:06 PM
Sunset: 8:25 PM
Daylight: 14 hrs 36 mins
Moonrise: 12:20 AM
Moon Transit: 12:15 AM
Moonset: 11:58 AM
Moon Phase: Waning Gibbous
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

11:28 AM - 12:58 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 17, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 75.8°F
Average Humidity: 84%
Chance of Rain: 89%
Wind: 6.9 mph
UV Index: 2.6

Air Quality

AQI: 1 - Good
PM2.5: 15.3 μg/m3
PM10: 17.92 μg/m3
Carbon Monoxide: 309.32 μg/m3
Nitrogen Dioxide: 12.47 μg/m3
Sulphur Dioxide: 4.85 μg/m3
Ozone: 89.6 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:06 PM
Sunset: 8:24 PM
Daylight: 14 hrs 35 mins
Moonrise: 12:44 AM
Moon Transit: 6:20 AM
Moonset: 1:09 PM
Moon Phase: Last Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

5:50 AM - 8:20 AM
6:13 PM - 8:43 PM

Minor Periods

12:39 AM - 2:09 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Friday, July 18, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 78°F
Average Humidity: 87%
Chance of Rain: 88%
Wind: 6.7 mph
UV Index: 0

Air Quality

AQI: 2 - Moderate
PM2.5: 15.98 μg/m3
PM10: 20.28 μg/m3
Carbon Monoxide: 409.7 μg/m3
Nitrogen Dioxide: 23.91 μg/m3
Sulphur Dioxide: 4.35 μg/m3
Ozone: 58.62 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:06 PM
Sunset: 8:23 PM
Daylight: 14 hrs 33 mins
Moonrise: 12:11 AM
Moon Transit: 7:10 AM
Moonset: 2:23 PM
Moon Phase: Last Quarter
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

6:40 AM - 9:10 AM
7:05 PM - 9:35 PM

Minor Periods

1:53 PM - 3:23 PM
12:00 AM - 12:00 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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