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Year-to-Date Precipitation Tool. Historical Climate Information. Here are extensive climate statistics for individual sites in Illinois, including monthly normals and extremes. Stations were chosen based on length of record and completeness of data. Normal monthly temperature and precipitation data for all sites can be downloaded (Excel).
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The Illinois State Climatologist provides maps of current...
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High-resolution precipitation maps based on National Weather Service radar-estimated precipitation, adjusted using available rain gauge data. This results in 4 km (or 2.5 mile) resolution maps of precipitation. These are typically updated by 4:15 p.m. each day for conditions through this morning.
The Illinois State Climatologist provides maps of current climate conditions in Illinois including precipitation, mean temperature, maximum temperature, minimum temperature, and snowfall for selected time periods. These are typically updated around 11 am each day.
Find historical weather by searching for a city, zip code, or airport code. Include a date for which you would like to see weather history. You can select a range of dates in the results on the...
Check records of past weather: explore how hot or cold it got through the week, how much rain or snow/sleet/hail fell, and how deep any snow was on the ground. Check what the weather was like on specific dates in history: did a snowstorm affect voter turnout on an election day? What was the weather on dates that are important to you?
Climate Data Online (CDO) provides free access to NCDC's archive of global historical weather and climate data in addition to station history information. These data include quality controlled daily, monthly, seasonal, and yearly measurements of temperature, precipitation, wind, and degree days as well as radar data and 30-year Climate Normals.
These maps describe the climate of Illinois using the official 1981-2010 normals from the National Climatic Data Center. Available maps include precipitation, temperature, snowfall, heating degree days, and cooling degree days, as well as number of days above or below selected thresholds of precipitation, temperature, and snowfall.
