Hot-summer humid continental climate
Climate Olney - Illinois
Annual high65ºF
Annual low43ºF
Precipitation47.42 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 38 | 20 | 3.05 | 4 |
| Feb | 43 | 24 | 2.73 | 3 |
| Mar | 54 | 32 | 4.34 | 1 |
| Apr | 66 | 43 | 4.33 | 0 |
| May | 75 | 53 | 5.83 | 0 |
| Jun | 84 | 62 | 4.19 | 0 |
| Jul | 87 | 66 | 4.33 | 0 |
| Aug | 87 | 64 | 3.20 | 0 |
| Sep | 80 | 55 | 3.07 | 0 |
| Oct | 68 | 44 | 3.99 | 0 |
| Nov | 55 | 34 | 4.48 | 0 |
| Dec | 41 | 24 | 3.88 | 3 |
- JanHigh 38ºFLow 20ºFPrecip 3.05 inch
- FebHigh 43ºFLow 24ºFPrecip 2.73 inch
- MarHigh 54ºFLow 32ºFPrecip 4.34 inch
- AprHigh 66ºFLow 43ºFPrecip 4.33 inch
- MayHigh 75ºFLow 53ºFPrecip 5.83 inch
- JunHigh 84ºFLow 62ºFPrecip 4.19 inch
- JulHigh 87ºFLow 66ºFPrecip 4.33 inch
- AugHigh 87ºFLow 64ºFPrecip 3.20 inch
- SepHigh 80ºFLow 55ºFPrecip 3.07 inch
- OctHigh 68ºFLow 44ºFPrecip 3.99 inch
- NovHigh 55ºFLow 34ºFPrecip 4.48 inch
- DecHigh 41ºFLow 24ºFPrecip 3.88 inch
Climate summary
What is the average weather in Olney, Illinois?
Olney experiences a humid continental climate, marked by a very large seasonal temperature contrast. Summers are hot, while winters are cold and bring regular snowfall. The area is fairly wet, with precipitation spread relatively evenly throughout the year, though spring tends to be the wettest season.
Olney weather averages
Annual high65ºF
Annual low43ºF
Precipitation47.42 inch
Snowfall11 inch
Daily normals Olney - Illinois - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 38.5 | 22.4 | 0.12 | 0.12 | 0.10 | 0.10 |
| Jan 2 | 38.3 | 22.3 | 0.25 | 0.25 | 0.20 | 0.20 |
| Jan 3 | 38.2 | 22.1 | 0.37 | 0.37 | 0.30 | 0.30 |
| Jan 4 | 38.0 | 21.9 | 0.49 | 0.49 | 0.40 | 0.40 |
| Jan 5 | 37.9 | 21.7 | 0.62 | 0.62 | 0.50 | 0.50 |
| Jan 6 | 37.8 | 21.6 | 0.74 | 0.74 | 0.70 | 0.70 |
| Jan 7 | 37.7 | 21.4 | 0.86 | 0.86 | 0.80 | 0.80 |
| Jan 8 | 37.6 | 21.3 | 0.98 | 0.98 | 0.90 | 0.90 |
| Jan 9 | 37.5 | 21.1 | 1.10 | 1.10 | 1.00 | 1.00 |
| Jan 10 | 37.5 | 21.0 | 1.23 | 1.23 | 1.20 | 1.20 |
| Jan 11 | 37.4 | 20.8 | 1.35 | 1.35 | 1.30 | 1.30 |
| Jan 12 | 37.4 | 20.7 | 1.47 | 1.47 | 1.40 | 1.40 |
| Jan 13 | 37.3 | 20.6 | 1.59 | 1.59 | 1.50 | 1.50 |
| Jan 14 | 37.3 | 20.5 | 1.71 | 1.71 | 1.70 | 1.70 |
| Jan 15 | 37.3 | 20.4 | 1.82 | 1.82 | 1.80 | 1.80 |
| Jan 16 | 37.3 | 20.3 | 1.94 | 1.94 | 1.90 | 1.90 |
| Jan 17 | 37.3 | 20.3 | 2.06 | 2.06 | 2.00 | 2.00 |
| Jan 18 | 37.4 | 20.2 | 2.17 | 2.17 | 2.20 | 2.20 |
| Jan 19 | 37.4 | 20.2 | 2.29 | 2.29 | 2.30 | 2.30 |
| Jan 20 | 37.5 | 20.2 | 2.39 | 2.39 | 2.40 | 2.40 |
| Jan 21 | 37.5 | 20.1 | 2.50 | 2.50 | 2.50 | 2.50 |
| Jan 22 | 37.6 | 20.1 | 2.61 | 2.61 | 2.60 | 2.60 |
| Jan 23 | 37.7 | 20.2 | 2.72 | 2.72 | 2.70 | 2.70 |
| Jan 24 | 37.8 | 20.2 | 2.83 | 2.83 | 2.90 | 2.90 |
| Jan 25 | 37.9 | 20.2 | 2.94 | 2.94 | 3.00 | 3.00 |
| Jan 26 | 38.0 | 20.3 | 3.04 | 3.04 | 3.10 | 3.10 |
| Jan 27 | 38.2 | 20.3 | 3.14 | 3.14 | 3.20 | 3.20 |
| Jan 28 | 38.3 | 20.4 | 3.23 | 3.23 | 3.30 | 3.30 |
| Jan 29 | 38.5 | 20.5 | 3.33 | 3.33 | 3.40 | 3.40 |
| Jan 30 | 38.7 | 20.6 | 3.42 | 3.42 | 3.50 | 3.50 |
| Jan 31 | 38.9 | 20.8 | 3.52 | 3.52 | 3.60 | 3.60 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Olney - June 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Jun 1 | 82.9 | 61.0 | 0.00 |
| Jun 2 | 84.0 | 61.0 | 0.00 |
| Jun 3 | 82.0 | 57.0 | 0.00 |
| Jun 4 | 80.1 | 60.1 | 0.00 |
| Jun 5 | 82.0 | 60.1 | 0.00 |
| Jun 6 | 87.1 | 64.0 | 0.00 |
| Jun 7 | 89.1 | 71.1 | 0.00 |
| Jun 8 | 89.1 | 72.0 | 0.00 |
| Jun 9 | 84.0 | 73.9 | 1.30 |
| Jun 10 | 91.0 | 73.9 | 0.00 |
| Jun 11 | 91.0 | 66.9 | – |
| Jun 12 | 91.0 | 66.9 | 0.65 |
| Jun 13 | 82.0 | 64.9 | 0.00 |
| Jun 14 | 80.1 | 64.9 | 0.00 |
| Jun 15 | 75.9 | 60.1 | 0.00 |
| Jun 16 | 75.9 | 55.0 | 0.00 |
| Jun 17 | 75.0 | 57.0 | 0.00 |
| Jun 18 | 82.9 | 57.0 | 0.73 |
| Jun 19 | 79.0 | 59.0 | 0.00 |
| Jun 20 | 84.0 | 59.0 | 0.00 |
| Jun 21 | 82.0 | 64.0 | 0.00 |
| Jun 22 | 82.0 | 63.0 | – |
| Jun 23 | 73.0 | 57.0 | 0.00 |
| Jun 24 | 80.1 | 59.0 | 0.00 |
| Jun 25 | 81.0 | 64.9 | 0.00 |
| Jun 26 | 82.0 | 69.1 | – |
| Jun 27 | 75.0 | 69.1 | 0.78 |
| Jun 28 | 75.9 | 72.0 | 1.24 |
| Jun 29 | 90.0 | 72.0 | 0.00 |
| Jun 30 | 91.0 | 73.0 | 0.00 |
The data for June 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 temperature91.0ºF · Jun 10
- Lowest max temperature73.0ºF · Jun 23
- Highest min temperature73.9ºF · Jun 9
- Lowest min temperature55.0ºF · Jun 16
Geo Olney - Illinois
Location
- Country
- United States
- State
- Illinois
- County
- Richland
- City
- Olney
- Zip Code
- 62450
- Elevation
- 482 ft
- Longitude
- -88.09
- Latitude
- 38.73
- ICAO
- –
- IATA
- –