A lack of 90+ degree heat has been observed in central and southeast Illinois during the past two summers (June through August). 

A review of the climatological database revealed the following information about 90 degree days...

Peoria - data since 1893
Average: 23
Most: 56 in 1936
Fewest: 5 in 2004
2008: 6
2009: 6

Springfield - data since 1879
Average: 25
Most: 58 in 1936
Fewest: 4 in 1950
2008: 5
2009: 12

Lincoln - data since 1906
Average: 28
Most: 65 in 1936
Fewest: 5 in 2008
2008: 5
2009: 9

Galesburg - data since 1936
Average: 17
Most: 43 in 1988
Fewest: 3 in 2008
2008: 3
2009: 4

Urbana - data since 1889
Average: 20
Most: 48 in 1936
Fewest: 1 in 2008
2008: 1
2009: 13

Charleston - data since 1896
Average: 28
Most: 67 in 1936
Fewest: 3 in 1915
2008: not available
2009: 14

Flora 5NW - data since 1893
Average: 36
Most: 74 in 1936
Fewest: 11 in 2000
2008: 18
2009: 14


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