Official 1981-2010 Climate Normals City: BOURBONNAIS 3NW State: IL ID: 110803 Latitude: 41.1750 Longitude: -87.9350 Elevation: 649.8 ft Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul ...

Illinois was both warmer and wetter than the 1991–2020 normal in 2025. The statewide average annual temperature was 53.6 degrees, 1.0 degree above normal and the 18 th warmest year on record statewide ...

In 2026, Illinois has set a new annual record number of tornadoes (by July), set a new state hailstone record, and withstood flash floods, derechos, and seemingly everything in between — and it’s only ...

The Prairie State is no stranger to intense precipitation and consequential flooding. However, the frequency and intensity of rainfall have been increasing in recent decades, putting a renewed focus ...

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 ...

Illinois was both warmer and wetter than the 1991–2020 normal in 2024. The statewide average annual temperature was 55.5 degrees, 2.9 degrees above normal and 2 nd warmest on record statewide.

An extremely dry end to summer and start to fall has intensified ongoing drought in central and southern Illinois and increased the fire and blowing dust risk as we approach harvest. River levels have ...

The preliminary statewide average June temperature was 72.0 degrees, 0.2 degrees below the 1991–2020 normal, 0.6 degrees above the 20th Century average, 0.3 degrees below the most recent 30-year ...

The preliminary statewide average January temperature was 23.5 degrees, 3.2 degrees below the 1991-2020 average and tied for the 41 st coldest on record going back to 1895. The preliminary statewide ...

The preliminary statewide average August temperature was 74.5 degrees, 0.9 degrees above 1991-2020 average, 1.1 degrees above the 20 th century average, 0.8 degrees above the most recent 30-year ...

The USDA released their new Plant Hardiness Zone map, which shows significant changes in Illinois’ hardiness zones, reflecting the impact of human-caused climate change. The newest Illinois maps is ...

The preliminary statewide average March temperature was 47.3 degrees, 5.9 degrees above the 1991–2020 normal, 7.5 degrees above the 20th Century average, 5.3 degrees above the most recent 30-year ...