Water Temperature of the Mississippi River in Alton, IL
Current Water Temperature
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 ParkSponsored Content
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

Humidity: 95%
Feels Like: 80.8°F
Wind: WSW 4.5 mph
Wind Gusts: 9.4 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast

Wed
H: 94°F
L: 73°F

Thu
H: 93°F
L: 75°F

Fri
H: 91°F
L: 77°F

Sat
H: 91°F
L: 71°F

Sun
H: 92°F
L: 72°F
Air Quality
Nitrogen Dioxide: 10.73 μg/m3
Sulphur Dioxide: 5 μg/m3
Ozone: 121 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 8:30 PM
Daylight: 14 hrs 54 mins
Moon Transit: 1:24 PM
Moonset: 9:22 PM
Moon Phase: New
Moon Illumination: 1.6%
Best Times for Fishing or Hunting
Major Periods
12:20 AM - 2:50 AM12:54 AM - 3:24 PM
Minor Periods
8:52 PM - 10:22 PM4:51 AM - 6:21 AM
Action Rating: 4 out of 5
Heat Advisory issued June 24 at 1:47PM CDT until June 26 at 9:00PM CDT by NWS St Louis MO
Effective: Tue June 24, 2025, 1:47 PM
Expires: Wed June 25, 2025, 5:00 AM
* WHAT...Heat index values up to 104. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Heat Advisory issued June 24 at 1:47PM CDT until June 26 at 9:00PM CDT by NWS St Louis MO
Effective: Tue June 24, 2025, 1:47 PM
Expires: Wed June 25, 2025, 5:00 AM
* WHAT...Heat index values up to 104. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Heat Advisory issued June 24 at 1:47PM CDT until June 26 at 9:00PM CDT by NWS St Louis MO
Effective: Tue June 24, 2025, 1:47 PM
Expires: Wed June 25, 2025, 5:00 AM
* WHAT...Heat index values up to 104. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Heat Advisory issued June 24 at 1:47PM CDT until June 26 at 9:00PM CDT by NWS St Louis MO
Effective: Tue June 24, 2025, 1:47 PM
Expires: Wed June 25, 2025, 5:00 AM
* WHAT...Heat index values up to 104. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Heat Advisory issued June 24 at 1:47PM CDT until June 26 at 9:00PM CDT by NWS St Louis MO
Effective: Tue June 24, 2025, 1:47 PM
Expires: Wed June 25, 2025, 5:00 AM
* WHAT...Heat index values up to 104. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Weather Forecast
Average Temperature: 80.9°F
Average Humidity: 85%
Wind: 8.3 mph
UV Index: 2.4
Air Quality
Nitrogen Dioxide: 20.27 μg/m3
Sulphur Dioxide: 5.91 μg/m3
Ozone: 108.84 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 8:30 PM
Daylight: 14 hrs 54 mins
Moon Transit: 1:24 PM
Moonset: 9:22 PM
Moon Phase: New
Moon Illumination: 1.6%
Best Times for Fishing or Hunting
Major Periods
12:20 AM - 2:50 AM12:54 AM - 3:24 PM
Minor Periods
8:52 PM - 10:22 PM4:51 AM - 6:21 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 83.8°F
Average Humidity: 74%
Wind: 8.9 mph
UV Index: 2.4
Air Quality
Nitrogen Dioxide: 16.1 μg/m3
Sulphur Dioxide: 5.11 μg/m3
Ozone: 105.12 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 8:30 PM
Daylight: 14 hrs 53 mins
Moon Transit: 2:25 PM
Moonset: 10:09 PM
Moon Phase: New
Moon Illumination: 0.1%
Best Times for Fishing or Hunting
Major Periods
1:24 AM - 3:54 AM1:55 PM - 4:25 PM
Minor Periods
9:39 PM - 11:09 PM6:03 AM - 7:33 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 81.9°F
Average Humidity: 76%
Wind: 13.4 mph
UV Index: 2.5
Air Quality
Nitrogen Dioxide: 13.31 μg/m3
Sulphur Dioxide: 4.58 μg/m3
Ozone: 99.16 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 8:30 PM
Daylight: 14 hrs 53 mins
Moon Transit: 3:22 PM
Moonset: 10:46 PM
Moon Phase: New
Moon Illumination: 2.0%
Best Times for Fishing or Hunting
Major Periods
2:23 AM - 4:53 AM2:52 PM - 5:22 PM
Minor Periods
10:16 PM - 11:46 PM7:17 AM - 8:47 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 80.5°F
Average Humidity: 79%
Wind: 7.6 mph
UV Index: 2.6
Air Quality
Nitrogen Dioxide: 24.55 μg/m3
Sulphur Dioxide: 4.5 μg/m3
Ozone: 68.15 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:30 PM
Daylight: 14 hrs 53 mins
Moon Transit: 4:12 PM
Moonset: 11:15 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.5%
Best Times for Fishing or Hunting
Major Periods
3:16 AM - 5:46 AM3:42 PM - 6:12 PM
Minor Periods
12:00 AM - 12:00 AM8:28 AM - 9:58 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 79.7°F
Average Humidity: 80%
Wind: 11.6 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:30 PM
Daylight: 14 hrs 52 mins
Moon Transit: 4:58 PM
Moonset: 12:15 AM
Moon Phase: Waxing Crescent
Moon Illumination: 13.1%
Best Times for Fishing or Hunting
Major Periods
4:05 AM - 6:35 AM4:28 PM - 6:58 PM
Minor Periods
9:36 AM - 11:06 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5