Hot-summer humid continental climate
Climate Chicago-O Hare International Airport - Illinois
Annual high59ºF
Annual low41ºF
Precipitation36.89 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 31 | 17 | 1.73 | 11 |
| Feb | 35 | 20 | 1.79 | 9 |
| Mar | 47 | 29 | 2.50 | 6 |
| Apr | 59 | 39 | 3.38 | 1 |
| May | 70 | 48 | 3.68 | 0 |
| Jun | 80 | 58 | 3.45 | 0 |
| Jul | 84 | 64 | 3.70 | 0 |
| Aug | 82 | 63 | 4.90 | 0 |
| Sep | 75 | 54 | 3.21 | 0 |
| Oct | 62 | 43 | 3.15 | 0 |
| Nov | 48 | 32 | 3.15 | 1 |
| Dec | 35 | 21 | 2.25 | 9 |
- JanHigh 31ºFLow 17ºFPrecip 1.73 inch
- FebHigh 35ºFLow 20ºFPrecip 1.79 inch
- MarHigh 47ºFLow 29ºFPrecip 2.50 inch
- AprHigh 59ºFLow 39ºFPrecip 3.38 inch
- MayHigh 70ºFLow 48ºFPrecip 3.68 inch
- JunHigh 80ºFLow 58ºFPrecip 3.45 inch
- JulHigh 84ºFLow 64ºFPrecip 3.70 inch
- AugHigh 82ºFLow 63ºFPrecip 4.90 inch
- SepHigh 75ºFLow 54ºFPrecip 3.21 inch
- OctHigh 62ºFLow 43ºFPrecip 3.15 inch
- NovHigh 48ºFLow 32ºFPrecip 3.15 inch
- DecHigh 35ºFLow 21ºFPrecip 2.25 inch
Climate summary
What is the average weather in Chicago-O Hare International Airport, Illinois?
Chicago-O'Hare International Airport experiences a humid continental climate, marked by very large seasonal temperature contrasts. Summers are warm, while winters are cold and bring significant snowfall. Precipitation is fairly wet overall, with a strong pattern of wetter summers and drier winters, though moisture is spread relatively evenly throughout the year.
Chicago-O Hare International Airport weather averages
Annual high59ºF
Annual low41ºF
Precipitation36.89 inch
Snowfall37 inch
Daily normals Chicago-O Hare International Airport - Illinois - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 32.9 | 20.8 | 0.07 | 0.07 | 0.30 | 0.30 |
| Jan 2 | 32.7 | 20.6 | 0.13 | 0.13 | 0.60 | 0.60 |
| Jan 3 | 32.6 | 20.4 | 0.20 | 0.20 | 0.90 | 0.90 |
| Jan 4 | 32.4 | 20.2 | 0.27 | 0.27 | 1.20 | 1.20 |
| Jan 5 | 32.3 | 20.0 | 0.34 | 0.34 | 1.50 | 1.50 |
| Jan 6 | 32.1 | 19.9 | 0.40 | 0.40 | 1.80 | 1.80 |
| Jan 7 | 32.0 | 19.7 | 0.47 | 0.47 | 2.20 | 2.20 |
| Jan 8 | 31.9 | 19.5 | 0.54 | 0.54 | 2.50 | 2.50 |
| Jan 9 | 31.8 | 19.3 | 0.61 | 0.61 | 2.90 | 2.90 |
| Jan 10 | 31.7 | 19.2 | 0.68 | 0.68 | 3.20 | 3.20 |
| Jan 11 | 31.6 | 19.0 | 0.75 | 0.75 | 3.50 | 3.50 |
| Jan 12 | 31.5 | 18.9 | 0.82 | 0.82 | 3.90 | 3.90 |
| Jan 13 | 31.4 | 18.7 | 0.88 | 0.88 | 4.20 | 4.20 |
| Jan 14 | 31.3 | 18.6 | 0.95 | 0.95 | 4.60 | 4.60 |
| Jan 15 | 31.2 | 18.5 | 1.01 | 1.01 | 5.00 | 5.00 |
| Jan 16 | 31.2 | 18.4 | 1.08 | 1.08 | 5.30 | 5.30 |
| Jan 17 | 31.1 | 18.3 | 1.15 | 1.15 | 5.70 | 5.70 |
| Jan 18 | 31.1 | 18.2 | 1.21 | 1.21 | 6.10 | 6.10 |
| Jan 19 | 31.1 | 18.1 | 1.28 | 1.28 | 6.50 | 6.50 |
| Jan 20 | 31.1 | 18.0 | 1.34 | 1.34 | 6.90 | 6.90 |
| Jan 21 | 31.1 | 18.0 | 1.40 | 1.40 | 7.30 | 7.30 |
| Jan 22 | 31.1 | 18.0 | 1.46 | 1.46 | 7.70 | 7.70 |
| Jan 23 | 31.1 | 17.9 | 1.53 | 1.53 | 8.10 | 8.10 |
| Jan 24 | 31.2 | 17.9 | 1.59 | 1.59 | 8.50 | 8.50 |
| Jan 25 | 31.2 | 17.9 | 1.65 | 1.65 | 8.90 | 8.90 |
| Jan 26 | 31.3 | 18.0 | 1.71 | 1.71 | 9.30 | 9.30 |
| Jan 27 | 31.4 | 18.0 | 1.76 | 1.76 | 9.70 | 9.70 |
| Jan 28 | 31.4 | 18.1 | 1.82 | 1.82 | 10.10 | 10.10 |
| Jan 29 | 31.6 | 18.1 | 1.88 | 1.88 | 10.50 | 10.50 |
| Jan 30 | 31.7 | 18.2 | 1.93 | 1.93 | 10.90 | 10.90 |
| Jan 31 | 31.8 | 18.3 | 1.99 | 1.99 | 11.30 | 11.30 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Chicago-O Hare International Airport - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 70.0 | 61.0 | 1.41 |
| Oct 2 | 66.9 | 52.0 | 0.00 |
| Oct 3 | 69.1 | 48.0 | 0.00 |
| Oct 4 | – | – | – |
| Oct 5 | – | – | – |
| Oct 6 | – | – | – |
| Oct 7 | 79.0 | 57.0 | 0.00 |
| Oct 8 | 73.0 | 53.1 | 0.00 |
| Oct 9 | 71.1 | 55.9 | T |
| Oct 10 | 80.1 | 62.1 | 0.00 |
| Oct 11 | 78.1 | 55.0 | 0.00 |
| Oct 12 | 88.0 | 63.0 | 0.00 |
| Oct 13 | 80.1 | 64.9 | 0.11 |
| Oct 14 | 66.0 | 59.0 | 0.09 |
| Oct 15 | 66.0 | 57.0 | 0.92 |
| Oct 16 | 57.0 | 41.0 | 0.01 |
| Oct 17 | – | – | – |
| Oct 18 | 63.0 | 42.1 | 0.00 |
| Oct 19 | – | – | – |
| Oct 20 | – | – | – |
| Oct 21 | 71.1 | 45.0 | 0.00 |
| Oct 22 | 73.0 | 50.0 | 0.00 |
| Oct 23 | 71.1 | 48.9 | 0.00 |
| Oct 24 | 70.0 | 50.0 | 0.00 |
| Oct 25 | 73.0 | 52.0 | 0.00 |
| Oct 26 | 62.1 | 53.1 | 0.00 |
| Oct 27 | 69.1 | 53.1 | 0.00 |
| Oct 28 | 75.9 | 55.0 | 0.00 |
| Oct 29 | – | – | – |
| Oct 30 | – | – | – |
| Oct 31 | – | – | – |
The data for October 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature88.0ºF · Oct 12
- Lowest max temperature57.0ºF · Oct 16
- Highest min temperature64.9ºF · Oct 13
- Lowest min temperature41.0ºF · Oct 16
Geo Chicago-O Hare International Airport - Illinois
Location
- Country
- United States
- State
- Illinois
- County
- Cook
- City
- Chicago-O Hare International Airport
- Zip Code
- 60666
- Elevation
- 659 ft
- Longitude
- -87.90
- Latitude
- 41.98
- ICAO
- –
- IATA
- –