Average annual temperature is 11.0 °C
Absolute maximum temperature: 39.1 °C
Absolute minimum temperature: -21.2 °C
Number of sunny days: 221 days
Number of rainy days: 118 days
Number of snow days: 26 days
Look at detailed online map of Olean
* Weather data for Olean United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 5.9 | 13.8 | 19.2 | 28.9 | 29.4 | 33.8 | 37.5 | 39.1 | 36.3 | 30.5 | 19.0 | 14.2 |
| Average daytime temperature (°C) | -1.3 | 4.2 | 8.5 | 18.0 | 24.7 | 28.9 | 29.9 | 31.2 | 27.4 | 17.5 | 11.5 | 5.7 |
| Average temperature (°C) | -5.1 | -2.5 | 1.0 | 10.4 | 18.2 | 22.6 | 23.7 | 24.6 | 21.0 | 11.6 | 5.3 | 0.6 |
| Average night temperature (°C) | -8.4 | -7.3 | -3.9 | 4.1 | 12.4 | 16.9 | 18.3 | 19.2 | 15.3 | 6.9 | 0.7 | -2.9 |
| Absolute minimum temperature (°C) | -21.2 | -19.8 | -10.5 | -5.7 | 1.8 | 10.6 | 12.2 | 12.9 | 8.8 | -7.7 | -6.6 | -7.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.1 | 8.0 | 8.9 | 10.9 | 11.1 | 12.2 | 12.1 | 11.8 | 10.4 | 7.6 | 7.1 | 4.7 |
| Precipitation (mm) | 64 | 22 | 27 | 9 | 50 | 107 | 109 | 39 | 40 | 84 | 23 | 40 |
| Sunny days | 17 | 18 | 22 | 23 | 12 | 12 | 14 | 17 | 22 | 17 | 25 | 22 |
| Rainy days | 5 | 4 | 5 | 6 | 19 | 18 | 17 | 14 | 8 | 12 | 3 | 7 |
| Snow days | 9 | 6 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 |
The best time to visit Olean during the most sunny months:
The largest precipitation sum in Olean is at