Weather Reports for the city of Olney in Illinois
snow
rain
temp
wind
humidity| Jan | Feb | Mar | Apr | May | Jun | |
|---|---|---|---|---|---|---|
| Average High (°F) | 39.6 | 44.0 | 56.4 | 68.1 | 77.7 | 86.1 |
| Average Low (°F) | 24.6 | 27.0 | 37.4 | 46.6 | 57.6 | 65.9 |
| All Time High (°F) | 69.1 | 77.0 | 86.0 | 87.8 | 95.4 | 107.6 |
| All Time Low (°F) | -16.1 | -12.1 | -0.4 | 22.6 | 32.9 | 46.4 |
| Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| Average High (°F) | 88.0 | 86.2 | 82.1 | 70.2 | 55.1 | 46.0 |
| Average Low (°F) | 68.2 | 65.3 | 58.6 | 47.9 | 35.9 | 30.7 |
| All Time High (°F) | 109.4 | 102.2 | 102.2 | 94.5 | 84.2 | 73.4 |
| All Time Low (°F) | 49.1 | 49.1 | 33.8 | 23.9 | 3.7 | -7.6 |
| Jan | Feb | Mar | Apr | May | Jun | |
|---|---|---|---|---|---|---|
| Percent of Rainy Days | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 |
| Avg. Rainfall (in) on Rainy Day | 0.2 | 0.3 | 0.3 | 0.3 | 0.2 | 0.3 |
| All Time Rainfall (in) on Rainy Day | 2.3 | 1.6 | 1.7 | 1.9 | 1.8 | 3.1 |
| 30 Day Rain Accumulation | 1.0 | 1.0 | 1.6 | 1.8 | 1.6 | 1.6 |
| All Time 30 Day Rain Accumulation | 4.4 | 5.0 | 5.6 | 7.9 | 5.7 | 9.8 |
| Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| Percent of Rainy Days | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Avg. Rainfall (in) on Rainy Day | 0.4 | 0.3 | 0.4 | 0.3 | 0.4 | 0.3 |
| All Time Rainfall (in) on Rainy Day | 2.6 | 2.4 | 3.5 | 1.8 | 2.3 | 1.9 |
| 30 Day Rain Accumulation | 1.9 | 1.4 | 1.2 | 1.3 | 1.4 | 1.2 |
| All Time 30 Day Rain Accumulation | 8.7 | 7.2 | 7.2 | 5.4 | 6.1 | 6.0 |
| Jan | Feb | Mar | Apr | May | Jun | |
|---|---|---|---|---|---|---|
| Percent of Days with Snowfall | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 |
| Avg. Snowfall Depth (in) | 1.5 | 1.4 | 0.9 | 0.1 | 0.0 | 0.0 |
| 30 Day Snowfall Total (in) | 2.4 | 2.0 | 0.5 | 0.0 | 0.0 | 0.0 |
| All Time Snowfall Depth (in) | 20.0 | 15.2 | 5.8 | 0.6 | 0.0 | 0.0 |
| All Time 30 Day Snowfall Total (in) | 20.8 | 25.9 | 10.9 | 0.6 | 0.0 | 0.0 |
| Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| Percent of Days with Snowfall | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Avg. Snowfall Depth (in) | 0.0 | 0.0 | 0.0 | 0.4 | 1.1 | 0.8 |
| 30 Day Snowfall Total (in) | 0.0 | 0.0 | 0.0 | 0.0 | 0.5 | 1.0 |
| All Time Snowfall Depth (in) | 0.0 | 0.0 | 0.0 | 0.7 | 12.1 | 5.7 |
| All Time 30 Day Snowfall Total (in) | 0.0 | 0.0 | 0.0 | 0.7 | 12.1 | 9.0 |
Instead of using humidity directly we use dew point to measure what people commonly mean when saying it feels humid. Dew point is classified into 4 categories: Dry (under 25°F), Comfortable (25°F to 60°F), Muggy (60°F to 70°F) and Oppressive (70°F or greater). The table below shows the percentage of days with a dew point within a particular class.
| Jan | Feb | Mar | Apr | May | Jun | |
|---|---|---|---|---|---|---|
| Dry | 45.7 | 42.4 | 13.5 | 4.4 | 0.0 | 0.0 |
| Comfortable | 54.3 | 57.6 | 85.8 | 88.7 | 60.1 | 27.0 |
| Muggy | 0.0 | 0.0 | 0.7 | 6.8 | 38.2 | 49.4 |
| Oppressive | 0.0 | 0.0 | 0.0 | 0.0 | 1.8 | 23.6 |
| Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| Dry | 0.0 | 0.0 | 0.0 | 0.6 | 13.9 | 24.8 |
| Comfortable | 8.4 | 15.4 | 50.5 | 84.6 | 84.9 | 75.2 |
| Muggy | 43.3 | 49.5 | 41.4 | 14.7 | 1.2 | 0.1 |
| Oppressive | 48.3 | 35.0 | 8.1 | 0.2 | 0.0 | 0.0 |
The table below shows the distribution of average wind speeds in miles per hour for a given month or day. Wind speed may vary throughout a day and we show the average speed. Peak gusts or sustained maximum speeds may be significantly higher.
| Jan | Feb | Mar | Apr | May | Jun | |
|---|---|---|---|---|---|---|
| 10th | 4.0 | 4.0 | 4.0 | 4.1 | 4.0 | 3.8 |
| 25th | 5.2 | 5.4 | 5.4 | 5.4 | 5.3 | 4.7 |
| 50th | 7.4 | 7.5 | 7.5 | 7.6 | 6.9 | 6.1 |
| 75th | 10.6 | 10.5 | 10.6 | 10.8 | 9.3 | 8.1 |
| 90th | 13.9 | 13.8 | 14.1 | 14.2 | 12.2 | 10.7 |
| Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| 10th | 3.4 | 3.4 | 3.4 | 3.8 | 3.6 | 3.8 |
| 25th | 4.3 | 4.1 | 4.3 | 4.7 | 4.7 | 4.8 |
| 50th | 5.4 | 5.0 | 5.5 | 6.4 | 6.8 | 6.8 |
| 75th | 6.9 | 6.5 | 7.2 | 9.0 | 9.8 | 9.5 |
| 90th | 8.8 | 8.1 | 9.5 | 12.1 | 13.3 | 13.0 |
The table below shows the distribution of wind direction (wind coming out of a particular direction) for a given month or day. Wind direction may vary throughout a day and the computation accounts for all measured changes in direction througout the day or month.
| Jan | Feb | Mar | Apr | May | Jun | |
|---|---|---|---|---|---|---|
| North | 11.4 | 17.2 | 15.2 | 11.7 | 11.2 | 8.8 |
| NorthEast | 5.8 | 7.8 | 10.4 | 7.6 | 7.3 | 7.1 |
| East | 6.5 | 7.3 | 11.2 | 10.2 | 9.6 | 7.7 |
| SouthEast | 7.8 | 8.7 | 10.1 | 11.1 | 12.5 | 9.8 |
| South | 19.7 | 16.6 | 19.2 | 22.7 | 25.2 | 26.2 |
| SouthWest | 10.2 | 9.1 | 8.3 | 10.0 | 12.2 | 17.0 |
| West | 18.4 | 15.8 | 11.2 | 13.0 | 11.5 | 13.4 |
| NorthWest | 20.1 | 17.5 | 14.2 | 13.5 | 10.5 | 9.9 |
| Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| North | 13.9 | 14.8 | 16.4 | 12.4 | 11.1 | 11.4 |
| NorthEast | 10.2 | 11.4 | 11.7 | 7.0 | 5.8 | 6.1 |
| East | 8.7 | 9.6 | 10.2 | 7.1 | 5.6 | 7.5 |
| SouthEast | 9.7 | 10.2 | 8.7 | 9.4 | 12.3 | 10.6 |
| South | 21.4 | 21.6 | 21.0 | 23.7 | 28.2 | 22.3 |
| SouthWest | 15.0 | 11.6 | 11.1 | 10.8 | 8.3 | 9.7 |
| West | 10.7 | 9.5 | 9.2 | 15.2 | 13.2 | 16.4 |
| NorthWest | 10.4 | 11.0 | 11.6 | 14.4 | 15.2 | 16.0 |