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.
Base Period
Trend

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Illinois Average TemperatureMay-July1895202419051915192519351945195519651975198519952005201564.0ยฐF76.0ยฐF66.0ยฐF68.0ยฐF70.0ยฐF72.0ยฐF74.0ยฐF17.8ยฐC24.4ยฐC18.9ยฐC20.0ยฐC21.1ยฐC22.2ยฐC23.3ยฐCZingChart
Illinois Average Temperature
May-July
Period
Average Temperature
Rank
(out of 130)
May-July 202471.8ยฐF112
May-July 202370.3ยฐF82
May-July 202271.5ยฐF105
May-July 202169.9ยฐF69
May-July 202070.5ยฐF88
May-July 201970.3ยฐF82
May-July 201873.5ยฐF127
May-July 201770.2ยฐF77
May-July 201670.8ยฐF96
May-July 201570.3ยฐF82
May-July 201469.0ยฐF41
May-July 201369.5ยฐF56
May-July 201274.2ยฐF129
May-July 201171.6ยฐF110
May-July 201072.3ยฐF118
May-July 200968.6ยฐF28
May-July 200868.9ยฐF37
May-July 200771.2ยฐF101
May-July 200670.3ยฐF82
May-July 200570.7ยฐF93
May-July 200469.5ยฐF56
May-July 200367.9ยฐF19
May-July 200270.4ยฐF85
May-July 200170.2ยฐF77
May-July 200069.5ยฐF56
May-July 199971.6ยฐF110
May-July 199871.5ยฐF105
May-July 199767.7ยฐF15
May-July 199668.6ยฐF28
May-July 199569.6ยฐF61
May-July 199469.4ยฐF55
May-July 199370.1ยฐF74
May-July 199267.7ยฐF15
May-July 199173.3ยฐF125
May-July 199068.4ยฐF22
May-July 198968.5ยฐF25
May-July 198871.9ยฐF114
May-July 198773.4ยฐF126
May-July 198671.6ยฐF110
May-July 198569.3ยฐF52
May-July 198469.0ยฐF41
May-July 198370.0ยฐF71
May-July 198269.9ยฐF69
May-July 198168.6ยฐF28
May-July 198070.8ยฐF96
May-July 197969.0ยฐF41
May-July 197869.3ยฐF52
May-July 197772.4ยฐF120
May-July 197668.3ยฐF21
May-July 197570.5ยฐF88
May-July 197468.4ยฐF22
May-July 197368.9ยฐF37
May-July 197268.9ยฐF37
May-July 197168.9ยฐF37
May-July 197070.2ยฐF77
May-July 196969.0ยฐF41
May-July 196868.6ยฐF28
May-July 196767.2ยฐF8
May-July 196669.2ยฐF49
May-July 196570.6ยฐF91
May-July 196471.8ยฐF112
May-July 196369.5ยฐF56
May-July 196271.4ยฐF103
May-July 196167.4ยฐF10
May-July 196067.4ยฐF10
May-July 195971.3ยฐF102
May-July 195867.6ยฐF12
May-July 195770.1ยฐF74
May-July 195670.4ยฐF85
May-July 195570.6ยฐF91
May-July 195470.7ยฐF93
May-July 195372.0ยฐF115
May-July 195271.9ยฐF114
May-July 195168.8ยฐF35
May-July 195068.5ยฐF25
May-July 194972.1ยฐF117
May-July 194868.8ยฐF35
May-July 194766.6ยฐF6
May-July 194668.7ยฐF32
May-July 194565.9ยฐF2
May-July 194472.4ยฐF120
May-July 194370.5ยฐF88
May-July 194269.8ยฐF64
May-July 194171.6ยฐF110
May-July 194069.1ยฐF47
May-July 193971.2ยฐF101
May-July 193869.3ยฐF52
May-July 193769.5ยฐF56
May-July 193673.7ยฐF128
May-July 193567.6ยฐF12
May-July 193475.5ยฐF130
May-July 193372.7ยฐF122
May-July 193271.1ยฐF98
May-July 193170.6ยฐF91
May-July 193070.8ยฐF96
May-July 192967.7ยฐF15
May-July 192868.0ยฐF20
May-July 192767.1ยฐF7
May-July 192669.2ยฐF49
May-July 192569.2ยฐF49
May-July 192465.4ยฐF1
May-July 192369.6ยฐF61
May-July 192271.0ยฐF97
May-July 192173.1ยฐF124
May-July 192068.5ยฐF25
May-July 191970.4ยฐF85
May-July 191870.3ยฐF82
May-July 191766.1ยฐF3
May-July 191669.8ยฐF64
May-July 191566.4ยฐF5
May-July 191472.6ยฐF121
May-July 191371.2ยฐF101
May-July 191269.1ยฐF47
May-July 191172.9ยฐF123
May-July 191067.3ยฐF9
May-July 190967.8ยฐF18
May-July 190869.0ยฐF41
May-July 190766.3ยฐF4
May-July 190668.7ยฐF32
May-July 190569.0ยฐF41
May-July 190467.6ยฐF12
May-July 190368.4ยฐF22
May-July 190270.0ยฐF71
May-July 190172.1ยฐF117
May-July 190069.6ยฐF61
May-July 189970.1ยฐF74
May-July 189869.9ยฐF69
May-July 189768.7ยฐF32
May-July 189671.6ยฐF110
May-July 189569.8ยฐF64

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