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

61.3°F
Clear
Conditions: Clear
Humidity: 87%
Feels Like: 61.3°F
Wind: E 5.4 mph
Wind Gusts: 11.3 mph
Pressure: 30.01 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Thu
H: 95°F
L: 61°F
Moderate rain
Fri
H: 85°F
L: 62°F
Patchy rain nearby
Sat
H: 83°F
L: 62°F
Moderate rain
Sun
H: 74°F
L: 67°F
Moderate rain
Mon
H: 80°F
L: 65°F

Air Quality

PM2.5: 26.09 μg/m3
PM10: 26.64 μg/m3
Carbon Monoxide: 442.15 μg/m3
Nitrogen Dioxide: 50.88 μg/m3
Sulphur Dioxide: 13.51 μg/m3
Ozone: 46 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:54 AM
Sunset: 7:03 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:19 AM
Moon Transit: 10:37 AM
Moonset: 5:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:07 AM - 12:37 AM

Minor Periods

5:14 PM - 6:44 PM
2:49 AM - 4:19 AM

Action Rating: 3 out of 5

Air Quality Alert issued September 16 at 9:57PM CDT by NWS St Louis MO

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue September 16, 2025, 9:57 PM
Expires: Wed September 17, 2025, 10:00 PM

The St. Louis Clean Air Partnership has issued an air quality alert for the St. Louis metropolitan area from 10 AM to 8 PM CDT Wednesday. An Orange air quality forecast means that maximum ozone concentrations are expected to reach levels that pose a health risk. Adverse health effects increase as air quality deteriorates. Ground- level ozone is an air contaminant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. Reducing outdoor physical activity is recommended. If it is a regularly scheduled work day you are urged to consider telecommuting, carpooling, or utilizing public transit. Avoid excessive idling and do not top off when refueling motor vehicles. The use of gasoline-powered lawn equipment should be reduced or postponed until late in the day. For more information visit the St. Louis Clean Air Partnership at http://cleanair-stlouis.com/ For current Air Quality Index (AQI) values visit https://www.airnow.gov/


Air Quality Alert issued September 16 at 9:57PM CDT by NWS St Louis MO

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue September 16, 2025, 9:57 PM
Expires: Wed September 17, 2025, 10:00 PM

The St. Louis Clean Air Partnership has issued an air quality alert for the St. Louis metropolitan area from 10 AM to 8 PM CDT Wednesday. An Orange air quality forecast means that maximum ozone concentrations are expected to reach levels that pose a health risk. Adverse health effects increase as air quality deteriorates. Ground- level ozone is an air contaminant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. Reducing outdoor physical activity is recommended. If it is a regularly scheduled work day you are urged to consider telecommuting, carpooling, or utilizing public transit. Avoid excessive idling and do not top off when refueling motor vehicles. The use of gasoline-powered lawn equipment should be reduced or postponed until late in the day. For more information visit the St. Louis Clean Air Partnership at http://cleanair-stlouis.com/ For current Air Quality Index (AQI) values visit https://www.airnow.gov/


Air Quality Alert issued September 17 at 2:36PM CDT by NWS St Louis MO

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Wed September 17, 2025, 2:36 PM
Expires: Thu September 18, 2025, 8:00 PM

The St. Louis Clean Air Partnership has issued an air quality alert for the St. Louis metropolitan area until 8 PM CDT this evening. An Orange air quality forecast means that maximum ozone concentrations are expected to reach levels that pose a health risk. Adverse health effects increase as air quality deteriorates. Ground- level ozone is an air contaminant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. Reducing outdoor physical activity is recommended. If it is a regularly scheduled work day you are urged to consider telecommuting, carpooling, or utilizing public transit. Avoid excessive idling and do not top off when refueling motor vehicles. The use of gasoline-powered lawn equipment should be reduced or postponed until late in the day. For more information visit the St. Louis Clean Air Partnership at http://cleanair-stlouis.com/ For current Air Quality Index (AQI) values visit https://www.airnow.gov/


Air Quality Alert issued September 16 at 9:57PM CDT by NWS St Louis MO

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue September 16, 2025, 9:57 PM
Expires: Wed September 17, 2025, 10:00 PM

The St. Louis Clean Air Partnership has issued an air quality alert for the St. Louis metropolitan area from 10 AM to 8 PM CDT Wednesday. An Orange air quality forecast means that maximum ozone concentrations are expected to reach levels that pose a health risk. Adverse health effects increase as air quality deteriorates. Ground- level ozone is an air contaminant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. Reducing outdoor physical activity is recommended. If it is a regularly scheduled work day you are urged to consider telecommuting, carpooling, or utilizing public transit. Avoid excessive idling and do not top off when refueling motor vehicles. The use of gasoline-powered lawn equipment should be reduced or postponed until late in the day. For more information visit the St. Louis Clean Air Partnership at http://cleanair-stlouis.com/ For current Air Quality Index (AQI) values visit https://www.airnow.gov/


Air Quality Alert issued September 16 at 9:57PM CDT by NWS St Louis MO

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue September 16, 2025, 9:57 PM
Expires: Wed September 17, 2025, 10:00 PM

The St. Louis Clean Air Partnership has issued an air quality alert for the St. Louis metropolitan area from 10 AM to 8 PM CDT Wednesday. An Orange air quality forecast means that maximum ozone concentrations are expected to reach levels that pose a health risk. Adverse health effects increase as air quality deteriorates. Ground- level ozone is an air contaminant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. Reducing outdoor physical activity is recommended. If it is a regularly scheduled work day you are urged to consider telecommuting, carpooling, or utilizing public transit. Avoid excessive idling and do not top off when refueling motor vehicles. The use of gasoline-powered lawn equipment should be reduced or postponed until late in the day. For more information visit the St. Louis Clean Air Partnership at http://cleanair-stlouis.com/ For current Air Quality Index (AQI) values visit https://www.airnow.gov/


Thursday, September 18, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 76.9°F
Average Humidity: 59%
Chance of Rain: 0%
Wind: 15.2 mph
UV Index: 1.6

Air Quality

AQI: 2 - Moderate
PM2.5: 26.49 μg/m3
PM10: 26.91 μg/m3
Carbon Monoxide: 438.52 μg/m3
Nitrogen Dioxide: 52.23 μg/m3
Sulphur Dioxide: 13.2 μg/m3
Ozone: 93.4 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:54 AM
Sunset: 7:03 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:19 AM
Moon Transit: 10:37 AM
Moonset: 5:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:07 AM - 12:37 AM

Minor Periods

5:14 PM - 6:44 PM
2:49 AM - 4:19 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 72.5°F
Average Humidity: 73%
Chance of Rain: 88%
Wind: 7.6 mph
UV Index: 1.1

Air Quality

AQI: 2 - Moderate
PM2.5: 23.66 μg/m3
PM10: 24.28 μg/m3
Carbon Monoxide: 401.3 μg/m3
Nitrogen Dioxide: 24.17 μg/m3
Sulphur Dioxide: 11.22 μg/m3
Ozone: 109.96 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:54 AM
Sunset: 7:02 PM
Daylight: 12 hrs 16 mins
Moonrise: 4:27 AM
Moon Transit: 11:23 AM
Moonset: 6:10 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:53 AM - 1:23 PM

Minor Periods

5:40 PM - 7:10 PM
3:57 AM - 5:27 AM

Action Rating: 3 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 71.5°F
Average Humidity: 81%
Chance of Rain: 89%
Wind: 8.3 mph
UV Index: 1

Air Quality

AQI: 2 - Moderate
PM2.5: 31.14 μg/m3
PM10: 31.88 μg/m3
Carbon Monoxide: 413.96 μg/m3
Nitrogen Dioxide: 29.54 μg/m3
Sulphur Dioxide: 9.87 μg/m3
Ozone: 112.04 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:53 AM
Sunset: 7:00 PM
Daylight: 12 hrs 13 mins
Moonrise: 5:31 AM
Moon Transit: 12:07 AM
Moonset: 6:32 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:37 AM - 2:07 PM

Minor Periods

6:02 PM - 7:32 PM
5:01 AM - 6:31 AM

Action Rating: 3 out of 5

Sunday, September 21, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 69.7°F
Average Humidity: 85%
Chance of Rain: 84%
Wind: 12.8 mph
UV Index: 1

Air Quality

AQI: 2 - Moderate
PM2.5: 23.92 μg/m3
PM10: 24.68 μg/m3
Carbon Monoxide: 638.68 μg/m3
Nitrogen Dioxide: 55.67 μg/m3
Sulphur Dioxide: 8.27 μg/m3
Ozone: 67.62 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:53 AM
Sunset: 6:59 PM
Daylight: 12 hrs 11 mins
Moonrise: 6:34 AM
Moon Transit: 12:48 AM
Moonset: 6:53 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:18 AM - 2:48 PM

Minor Periods

6:23 PM - 7:53 PM
6:04 AM - 7:34 AM

Action Rating: 3 out of 5

Monday, September 22, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 69.8°F
Average Humidity: 84%
Chance of Rain: 75%
Wind: 14.5 mph
UV Index: 0

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:53 AM
Sunset: 6:57 PM
Daylight: 12 hrs 8 mins
Moonrise: 7:35 AM
Moon Transit: 1:28 PM
Moonset: 7:13 PM
Moon Phase: New
Moon Illumination: 2.9%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
12:58 AM - 3:28 PM

Minor Periods

6:43 PM - 8:13 PM
7:05 AM - 8:35 AM

Action Rating: 5 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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