What is the warmest month in Illinois?
The warmest month is July with an average temperature of 84 °F over the past years.
Calculated from weather data of Chicago O'hare International Airport (KORD) between 2020 and 2024.
Month | Average | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|---|
January | 33.0 | 31.0 | 38.0 | 29.0 | 34.0 | 36.0 |
February | 39.0 | 50.0 | 43.0 | 36.0 | 28.0 | 37.0 |
March | 49.0 | 54.0 | 46.0 | 50.0 | 54.0 | 51.0 |
April | 59.0 | 63.0 | 56.0 | 63.0 | 58.0 | |
May | 71.0 | 73.0 | 73.0 | 70.0 | 70.0 | |
June | 82.0 | 81.0 | 83.0 | 84.0 | 84.0 | |
July | 84.0 | 84.0 | 83.0 | 82.0 | 88.0 | |
August | 83.0 | 83.0 | 83.0 | 85.0 | 86.0 | |
September | 77.0 | 77.0 | 76.0 | 79.0 | 75.0 | |
October | 63.0 | 65.0 | 63.0 | 66.0 | 61.0 | |
November | 48.0 | 51.0 | 53.0 | 48.0 | 56.0 | |
December | 41.0 | 44.0 | 38.0 | 45.0 | 40.0 | |
Average | 59.0 | 45.0 | 62.0 | 61.0 | 62.0 | 62.0 |
Month | Average | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|---|
January | 22.0 | 23 | 28 | 14 | 26 | 25 |
February | 23.0 | 31 | 27 | 20 | 14 | 24 |
March | 33.0 | 37 | 33 | 33 | 37 | 35 |
April | 41.0 | 42 | 41 | 44 | 40 | |
May | 53.0 | 53 | 56 | 52 | 52 | |
June | 63.0 | 62 | 64 | 66 | 65 | |
July | 69.0 | 68 | 68 | 67 | 71 | |
August | 67.0 | 67 | 67 | 69 | 68 | |
September | 61.0 | 62 | 60 | 62 | 59 | |
October | 48.0 | 51 | 45 | 54 | 44 | |
November | 35.0 | 36 | 37 | 34 | 41 | |
December | 29.0 | 35 | 29 | 32 | 28 | |
Average | 43.0 | 30.0 | 47.0 | 45.0 | 47.0 | 46.0 |
Number of days | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|
86 °F or warmer | 0 | 31 | 30 | 42 | 54 |
77 °F or warmer | 0 | 109 | 108 | 112 | 111 |
68 °F or warmer | 6 | 158 | 155 | 164 | 150 |
32 °F or colder | 48 | 67 | 90 | 88 | 77 |
Month | Average | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|---|
January | 22.3 | 24 | 33 | 17 | 18 | 20 |
February | 15.4 | 1 | 14 | 26 | 21 | 15 |
March | 13.1 | 9 | 19 | 27 | 6 | 16 |
April | 12.8 | 12 | 17 | 8 | 13 | |
May | 9.1 | 7 | 14 | 7 | 11 | |
June | 5.2 | 5 | 6 | 6 | 4 | |
July | 3.7 | 7 | 7 | 3 | 3 | |
August | 2.8 | 4 | 5 | 1 | 0 | |
September | 5.9 | 12 | 6 | 3 | 7 | |
October | 11.1 | 14 | 7 | 12 | 8 | |
November | 11.6 | 9 | 18 | 10 | 7 | |
December | 13.2 | 21 | 27 | 8 | 10 | |
Average | 10.2 | 11.1 | 12.4 | 13.8 | 7.8 | 9.0 |
Month | Average | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|---|
January | 10.6 | 10 | 10 | 12 | 10 | 10 |
February | 11.6 | 11 | 12 | 13 | 10 | 13 |
March | 12.3 | 13 | 12 | 12 | 13 | 12 |
April | 12.0 | 12 | 13 | 11 | 11 | |
May | 10.8 | 10 | 12 | 11 | 10 | |
June | 9.9 | 10 | 10 | 9 | 10 | |
July | 9.1 | 8 | 10 | 9 | 9 | |
August | 9.2 | 10 | 10 | 9 | 9 | |
September | 9.6 | 9 | 10 | 10 | 11 | |
October | 10.7 | 11 | 10 | 10 | 11 | |
November | 11.0 | 10 | 12 | 11 | 12 | |
December | 10.4 | 10 | 11 | 11 | 10 | |
Average | 10.7 | 11.5 | 10.2 | 11.0 | 10.3 | 10.6 |
Month | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|
January | W | W | W | W | W |
February | W | W | W | W | NW |
March | W | NW | W | SW | SW |
April | SW | SW | W | NW | |
May | NE | SE | SE | NE | |
June | NE | W | SW | S | |
July | NW | W | N | W | |
August | N | NW | S | W | |
September | SE | NW | SW | W | |
October | W | SW | N | W | |
November | SW | SW | SW | SW | |
December | SW | S | SW | W |
The warmest month is July with an average temperature of 84 °F over the past years.
The coldest month is January with an average daytime temperature of 33 °F in the past few years.
Chance of precipitation is the highest in January with a probability of around 22.3 %.
The least rainfall and snow can be expected in August. The probability is about 2.9 %.