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

75.9°F
Sunny
Sunny
76°F
80.3°F
36%
NW 6.9 mph
8 mph
81.7°F
49.3°F
0 in
25%
9 mi
1016 mbar
8.7

Five Day Weather Forecast

Sunny
Mon
H: 83°F
L: 56°F
Patchy rain nearby
Tue
H: 75°F
L: 59°F
Moderate rain
Wed
H: 91°F
L: 60°F
Patchy rain nearby
Thu
H: 70°F
L: 61°F
Sunny
Fri
H: 77°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 5.6 μg/m3
PM10: 5.8 μg/m3
Carbon Monoxide: 108 μg/m3
Nitrogen Dioxide: 1.1 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 107 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:01 PM
Sunset: 8:28 PM
Daylight: 14 hrs 53 mins
Moonrise: 5:40 AM
Moon Transit: 1:42 PM
Moonset: 9:41 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
1:12 PM - 3:42 PM

Minor Periods

9:11 PM - 10:41 PM
5:10 AM - 6:40 AM

Action Rating: 4 out of 5

Flood Warning issued June 14 at 8:10PM CDT by NWS St Louis MO

Effective: Sun June 14, 2026, 8:10 PM
Expires: Tue June 16, 2026, 8:15 AM

...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Hardin. Illinois River at Valley City. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Illinois River at Hardin. * WHEN...From Monday afternoon until further notice. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land begins. * ADDITIONAL DETAILS... - At 8:00 PM CDT Sunday the stage was 24.6 feet. - Forecast...The river is expected to rise above flood stage early tomorrow afternoon and continue rising to a crest of 26.2 feet Thursday evening. - Flood stage is 25.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx


Flood Warning issued June 14 at 8:14PM CDT until June 20 at 7:00AM CDT by NWS St Louis MO

Effective: Sun June 14, 2026, 8:14 PM
Expires: Tue June 16, 2026, 8:15 AM

...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Hannibal. Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Chester. Mississippi River at Saverton. Mississippi River at Winfield. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at Winfield. * WHEN...From Monday evening to Saturday morning. * IMPACTS...At 27.5 feet, At this stage, Lock and Dam 25 will stockpile 200 tons of sand, 12,000 sandbags, and 10,000 square feet of polyethylene plastic as a precaution. * ADDITIONAL DETAILS... - At 8:00 PM CDT Sunday the stage was 25.5 feet. - Forecast...The river is expected to rise above flood stage tomorrow evening to a crest of 26.8 feet early Wednesday afternoon. It will then fall below flood stage early Friday morning. - Flood stage is 26.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx


Flood Warning issued June 14 at 8:14PM CDT until June 20 at 3:00AM CDT by NWS St Louis MO

Effective: Sun June 14, 2026, 8:14 PM
Expires: Tue June 16, 2026, 8:15 AM

...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Hannibal. Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Chester. Mississippi River at Saverton. Mississippi River at Winfield. 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 late Friday night. * IMPACTS...At 27.2 feet, Silo Park just northwest of Clarksville off Highway 79 begins flooding. * ADDITIONAL DETAILS... - At 8:00 PM CDT Sunday the stage was 25.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 PM CDT Sunday was 25.9 feet. - Forecast...The river is expected to rise to a crest of 26.9 feet Tuesday evening. It will then fall below flood stage late Thursday evening. - Flood stage is 25.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx


Monday, June 15, 2026

Weather Forecast

Sunny
82.8°F
56.3°F
69.7°F
54%
0 in
2%
0%
7.2 mph
9.3


Air Quality

AQI: 1 - Good
PM2.5: 6.97 μg/m3
PM10: 7.31 μg/m3
Carbon Monoxide: 144.13 μg/m3
Nitrogen Dioxide: 13.04 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 64.88 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:01 PM
Sunset: 8:28 PM
Daylight: 14 hrs 53 mins
Moonrise: 5:40 AM
Moon Transit: 1:42 PM
Moonset: 9:41 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
1:12 PM - 3:42 PM

Minor Periods

9:11 PM - 10:41 PM
5:10 AM - 6:40 AM

Action Rating: 4 out of 5

Tuesday, June 16, 2026

Weather Forecast

Patchy rain nearby
74.6°F
58.9°F
66.6°F
73%
0.13 in
61%
0%
12.5 mph
6.2


Air Quality

AQI: 1 - Good
PM2.5: 10.15 μg/m3
PM10: 10.86 μg/m3
Carbon Monoxide: 153.79 μg/m3
Nitrogen Dioxide: 9.54 μg/m3
Sulphur Dioxide: 2.52 μg/m3
Ozone: 77.63 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:01 PM
Sunset: 8:28 PM
Daylight: 14 hrs 54 mins
Moonrise: 6:55 AM
Moon Transit: 2:48 PM
Moonset: 10:32 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

1:44 AM - 4:14 AM
2:18 PM - 4:48 PM

Minor Periods

10:02 PM - 11:32 PM
6:25 AM - 7:55 AM

Action Rating: 3 out of 5

Wednesday, June 17, 2026

Weather Forecast

Moderate rain
90.6°F
60°F
75.1°F
74%
0.42 in
71%
0%
23 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 9.38 μg/m3
PM10: 9.77 μg/m3
Carbon Monoxide: 156.42 μg/m3
Nitrogen Dioxide: 10.48 μg/m3
Sulphur Dioxide: 1.89 μg/m3
Ozone: 65.13 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:01 PM
Sunset: 8:29 PM
Daylight: 14 hrs 54 mins
Moonrise: 8:14 AM
Moon Transit: 3:48 PM
Moonset: 11:12 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:18 PM - 5:48 PM

Minor Periods

12:00 AM - 12:00 AM
7:44 AM - 9:14 AM

Action Rating: 3 out of 5

Thursday, June 18, 2026

Weather Forecast

Patchy rain nearby
69.7°F
60.9°F
66.9°F
81%
0.01 in
36%
0%
18.3 mph
9.3


Air Quality

AQI: 1 - Good
PM2.5: 3 μg/m3
PM10: 3.4 μg/m3
Carbon Monoxide: 131.85 μg/m3
Nitrogen Dioxide: 6.29 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 70.88 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:01 PM
Sunset: 8:29 PM
Daylight: 14 hrs 54 mins
Moonrise: 9:30 AM
Moon Transit: 4:43 PM
Moonset: 12:12 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

3:45 AM - 6:15 AM
4:13 PM - 6:43 PM

Minor Periods

9:00 AM - 10:30 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, June 19, 2026

Weather Forecast

Sunny
76.6°F
57.2°F
66.7°F
73%
0 in
7%
0%
11.6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.05 μg/m3
PM10: 4.28 μg/m3
Carbon Monoxide: 180.25 μg/m3
Nitrogen Dioxide: 16.81 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 32.38 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:02 PM
Sunset: 8:29 PM
Daylight: 14 hrs 54 mins
Moonrise: 10:44 AM
Moon Transit: 5:33 PM
Moonset: 12:44 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

4:37 AM - 7:07 AM
5:03 PM - 7:33 PM

Minor Periods

10:14 AM - 11:44 AM
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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