Live readings · updated daily
Water temperature in Illinois
The latest readings from USGS real-time water sensors across Illinois, warmest first. Snapshot updated October 19, 2026.
Warmest sensor reading right now
70°F21°C
USGS gauge OHIO RIVER AT OLMSTED, IL · as of 19 hrs ago
All reporting stations (warmest 50 of 254)
| Station | Water temp | Streamflow | Gage height | Observed |
|---|---|---|---|---|
| OHIO RIVER AT OLMSTED, ILUSGS gauge | 70°F21°C | 121,000 ft³/s | 20.16 ft | 19 hrs ago |
| DES PLAINES RIVER AT ROCKDALE, ILUSGS gauge | 67°F19°C | — | — | 3 days ago |
| CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, ILUSGS gauge | 65°F18°C | — | — | 20 hrs ago |
| DES PLAINES RIVER AT CHANNAHON, ILUSGS gauge | 65°F18°C | — | — | 20 hrs ago |
| CHICAGO S & S CANAL AT WESTERN AVE AT CHICAGO, ILUSGS gauge | 64°F18°C | — | -2.14 ft | 19 hrs ago |
| ILLINOIS RIVER AT FLORENCE, ILUSGS gauge | 64°F18°C | — | 16.94 ft | 19 hrs ago |
| Mississippi River Pool Lock and Dam 26 at Alton,ILUSGS gauge | 64°F18°C | — | 17.85 ft | 19 hrs ago |
| BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, ILUSGS gauge | 64°F18°C | 82 ft³/s | 3.26 ft | 19 hrs ago |
| DES PLAINES RIVER AT ROUTE 53 AT JOLIET, ILUSGS gauge | 63°F17°C | 789 ft³/s | 539.01 ft | 19 hrs ago |
| 22N7W-29.1d4 (SH-2)USGS gauge | 62°F17°C | — | — | 19 hrs ago |
| ILLINOIS RIVER AT SENECA, ILUSGS gauge | 61°F16°C | — | 20.52 ft | 19 hrs ago |
| ILLINOIS RIVER AT STARVED ROCK, ILUSGS gauge | 61 °F16°C | — | — | 20 hrs ago |
| HANSON GRAVEL PIT AT CULVERT NEAR MORRIS, ILUSGS gauge | 60°F16°C | — | — | 20 hrs ago |
| SUGAR CREEK NEAR CHATHAM, ILUSGS gauge | 60°F15°C | — | — | 20 hrs ago |
| ILLINOIS RIVER AT HENRY, ILUSGS gauge | 59°F15°C | 10,200 ft³/s | 15.33 ft | 19 hrs ago |
| KANKAKEE RIVER AT CUSTER PARK, ILUSGS gauge | 59°F15°C | — | — | 19 hrs ago |
| LICK CREEK NEAR WOODSIDE, ILUSGS gauge | 59°F15°C | — | — | 20 hrs ago |
| MISSISSIPPI RIVER AT DAM 13 NEAR FULTON, ILUSGS gauge | 59°F15°C | — | 4.89 ft | 19 hrs ago |
| 22N7W-28.5a (IL Tree Nursery)USGS gauge | 58°F15°C | — | — | 19 hrs ago |
| KANKAKEE R AT INFLOW OF POWER PLANT NR LORENZO, ILUSGS gauge | 58°F14°C | — | 504.77 ft | 20 hrs ago |
| 22N7W-29.1d3 (DP-2)USGS gauge | 57°F14°C | — | — | 19 hrs ago |
| FOX RIVER NEAR MCHENRY, ILUSGS gauge | 56°F13°C | — | 4.01 ft | 19 hrs ago |
| ROCK RIVER AT BYRON, ILUSGS gauge | 56°F13°C | 6,500 ft³/s | 7.15 ft | 19 hrs ago |
| KANKAKEE RIVER NEAR WILMINGTON, ILUSGS gauge | 55°F13°C | 2,040 ft³/s | 1.51 ft | 19 hrs ago |
| NORTH FORK SALT CREEK NEAR DE WITT, ILUSGS gauge | 53°F12°C | — | 691.16 ft | 19 hrs ago |
| MASON TAZEWELL DRAINAGE D AT CR2350E NR TOPEKA, ILUSGS gauge | 53°F12°C | 60 ft³/s | 15.43 ft | 20 hrs ago |
| SALT CREEK NEAR FARMER CITY, ILUSGS gauge | 49°F9°C | 15 ft³/s | 689.60 ft | 19 hrs ago |
| ADDISON CREEK AT BELLWOOD, ILUSGS gauge | — | 33 ft³/s | 1.83 ft | 19 hrs ago |
| APPLE RIVER NEAR HANOVER, ILUSGS gauge | — | 107 ft³/s | 4.26 ft | 19 hrs ago |
| AUX SABLE CREEK NEAR MORRIS, ILUSGS gauge | — | 146 ft³/s | 3.73 ft | 20 hrs ago |
| BEAR CREEK NEAR MARCELLINE, ILUSGS gauge | — | 8 ft³/s | 2.43 ft | 19 hrs ago |
| BIG BUREAU CREEK AT PRINCETON, ILUSGS gauge | — | 135 ft³/s | 3.18 ft | 19 hrs ago |
| BIG MUDDY RIVER AT PLUMFIELD, ILUSGS gauge | — | 51 ft³/s | 2.57 ft | 19 hrs ago |
| BIG MUDDY RIVER BELOW REND LAKE NR BENTON, ILUSGS gauge | — | 47 ft³/s | 7.56 ft | 19 hrs ago |
| BLACK SLOUGH AT CR 500N NR PHILO, ILUSGS gauge | — | 1 ft³/s | 5.53 ft | 19 hrs ago |
| BLACKBERRY CREEK NEAR MONTGOMERY, ILUSGS gauge | — | 66 ft³/s | 4.04 ft | 19 hrs ago |
| BLACKBERRY CREEK NEAR YORKVILLE, ILUSGS gauge | — | 81 ft³/s | 4.04 ft | 19 hrs ago |
| BONEYARD CREEK AT LINCOLN AVE AT URBANA, ILUSGS gauge | — | 2 ft³/s | 7.48 ft | 19 hrs ago |
| BONEYARD CREEK AT URBANA, ILUSGS gauge | — | 2 ft³/s | 10.24 ft | 19 hrs ago |
| BONEYARD CREEK BELOW 6TH STREET AT CHAMPAIGN, ILUSGS gauge | — | — | 11.38 ft | 20 hrs ago |
| BONPAS CREEK AT BROWNS, ILUSGS gauge | — | 3 ft³/s | 1.72 ft | 19 hrs ago |
| BOONE CREEK NEAR MC HENRY, ILUSGS gauge | — | 14 ft³/s | 1.11 ft | 19 hrs ago |
| BUFFALO CREEK NEAR WHEELING, ILUSGS gauge | — | 4 ft³/s | 1.66 ft | 19 hrs ago |
| BUTTERFIELD CREEK AT FLOSSMOOR, ILUSGS gauge | — | 6 ft³/s | 4.04 ft | 19 hrs ago |
| CACHE RIVER AT FORMAN, ILUSGS gauge | — | 1 ft³/s | 8.25 ft | 20 hrs ago |
| CAHOKIA CREEK AT EDWARDSVILLE, ILUSGS gauge | — | 2 ft³/s | 3.27 ft | 19 hrs ago |
| CALUMET UNION DRAINAGE CANAL NEAR MARKHAM, ILUSGS gauge | — | 2 ft³/s | 2.30 ft | 19 hrs ago |
| CASEY FORK AT MOUNT VERNON, ILUSGS gauge | — | 2 ft³/s | 1.62 ft | 19 hrs ago |
| CHANNEL LAKE NEAR ANTIOCH, ILUSGS gauge | — | — | 4.13 ft | 19 hrs ago |
| CHICAGO RIVER AT CHICAGO LOCK AT CHICAGO, ILUSGS gauge | — | — | -2.17 ft | 19 hrs ago |
Station links open the official monitoring page with charts and history.
About these readings
Readings come from USGS real-time monitoring stations — 27 sensors are currently reporting a water temperature in Illinois. Each figure is a point measurement at one sensor, usually on a river or stream — it doesn’t describe a whole lake or shoreline, and coverage varies across the state. Data is provisional and can be revised by the USGS.
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