Illinois: water temperature

At sea, 14.7 °C on average across 1 stations, from 14.7 °C (Waukegan Buoy, IL) to 14.7 °C (Waukegan Buoy, IL). In fresh water, 16.1 °C on average across 30 stations, from 12.7 °C (Winthrop) to 20.1 °C (Ohio River At Olmsted, IL).

See on the map

Sea and ocean

Lakes and rivers

Warmest water today

Where these numbers come from

Every value is a real reading from an instrument, at its position: a buoy, a wharf, a river or lake station. It keeps the time it was measured. A reading too far from those of nearby stations is marked with a “?”. Between stations, the map gives a satellite or model estimate, always labelled as such.

Sources: Grands Lacs (Seagull), NOAA NDBC, USGS, eaux des États-Unis. Sources and credits

Nearby

• Indiana 35 stations · fresh water 15.5 °C
• Missouri 18 stations · fresh water 16.5 °C
• Iowa 10 stations · fresh water 15.6 °C
• Kentucky 45 stations · fresh water 15.9 °C
• Tennessee 17 stations · fresh water 16.1 °C
• Wisconsin 38 stations · sea 13.3 °C · fresh water 13.4 °C