Climate at a Glance | Statewide Mapping | National Centers for Environmental Information (NCEI)

Statewide Mapping

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Year:

Month:

Time Scale:

Please note, Degree Days and Palmer Indices are not available for Alaska or Hawaii. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales. Data are available for bulk download.

ValueAnomalyRankMean

Statewide Average Temperature

July - September 1980

0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F

Illinois

TempAverage Temperature: 74.6°F

Anomaly: 2.9°F

Rank: 5th Warmest

Mean: 71.7°F

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July - September 1980 Illinois Statewide Average Temperature
State	Value	Anomaly	Rank 130 Years	1901-2000 Mean
Illinois	74.6°F	2.9°F	126	71.7°F

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NOAA National Centers for Environmental information, Climate at a Glance: Statewide Mapping, published May 2025, retrieved on May 30, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/mapping

Climate at a Glance Statewide Mapping

Statewide Mapping

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