Average annual temperature is 11.5 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: -21.5 °C
Number of sunny days: 216 days
Number of rainy days: 121 days
Number of snow days: 28 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) | 8.4 | 14.6 | 21.8 | 29.3 | 31.2 | 33.6 | 35.4 | 37.7 | 35.4 | 31.5 | 18.8 | 12.5 |
| Average daytime temperature (°C) | -0.1 | 5.1 | 8.3 | 17.8 | 25.6 | 29.6 | 29.0 | 29.8 | 27.5 | 17.5 | 11.6 | 5.5 |
| Average temperature (°C) | -4.0 | -1.6 | 1.4 | 10.7 | 19.0 | 23.7 | 23.5 | 24.2 | 21.4 | 12.4 | 5.8 | 1.1 |
| Average night temperature (°C) | -7.3 | -6.0 | -3.2 | 5.0 | 12.9 | 17.9 | 18.6 | 19.4 | 16.4 | 8.2 | 1.2 | -2.5 |
| Absolute minimum temperature (°C) | -21.5 | -20.3 | -11.6 | -5.7 | 3.4 | 10.3 | 11.8 | 12.9 | 10.3 | -6.6 | -7.3 | -7.5 |
| 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) | 9.5 | 10.6 | 11.9 | 13.3 | 14.5 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.8 | 7.3 | 8.2 | 9.9 | 11.4 | 13.1 | 11.7 | 11.1 | 9.9 | 7.4 | 7.1 | 5.1 |
| Precipitation (mm) | 53 | 40 | 35 | 21 | 70 | 83 | 116 | 46 | 39 | 96 | 10 | 49 |
| Sunny days | 21 | 18 | 20 | 22 | 15 | 11 | 12 | 19 | 20 | 15 | 25 | 18 |
| Rainy days | 3 | 7 | 6 | 7 | 16 | 19 | 19 | 12 | 10 | 15 | 3 | 4 |
| Snow days | 7 | 3 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 9 |
The best time to visit Olean during the most sunny months:
The largest precipitation sum in Olean is at