Illinois State Water Survey Illinois State Climatologist

Soil Temperatures in Illinois, Waiting for the Drop Below 50 Degrees

One of the impacts of the warmer-than-average weather in October and November is that soil temperatures have been slow to fall below 50 degrees . This is the important temperature threshold for those applying fall fertilizer (55 degrees with an inhibitor). You can track daily soil temperatures from the Illinois Climate Network site:  http://www.isws.illinois.edu/warm/soil/  As […]

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Tracking Illinois Soil Temperatures

As the snow turns to mud this week, this is a good time to advertise links for the soil temperatures in Illinois. The Water Survey operates a 19-station network of sites around the state collecting hourly soil temperatures at 4 and 8 inches under grass as well as an estimate under bare ground. All this […]

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Soil Temperatures in Illinois

The Illinois State Water Survey maintains a network of 19 soil temperature sites across the state that measure temperatures at 4 and 8 inches. You can look at maps for 10 am, any hour of the day, high for the day, low for the day, under sod, and under bare soil. You can find all […]

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Frost Depth in Illinois

One of the effects of this exceptionally cold winter has been that our soils have remained frozen at considerable depths. We have hourly soil temperatures under grass at 19 sites across the state at 4 and 8 inches, available through the WARM website, that give us glimpses of soil conditions. Here are snapshots of the […]

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