Average annual temperature is 13.3 °C
Absolute maximum temperature: 33.6 °C
Absolute minimum temperature: -9.2 °C
Number of sunny days: 175 days
Number of rainy days: 184 days
Number of snow days: 6 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) | 16.8 | 21.2 | 23.3 | 27.0 | 29.9 | 32.3 | 33.6 | 33.3 | 32.4 | 29.2 | 24.7 | 14.5 |
| Average daytime temperature (°C) | 7.7 | 12.2 | 12.4 | 18.6 | 23.2 | 27.1 | 29.4 | 28.4 | 26.3 | 19.7 | 12.9 | 8.9 |
| Average temperature (°C) | 3.7 | 5.5 | 6.0 | 12.0 | 17.0 | 21.1 | 24.0 | 22.9 | 20.3 | 14.2 | 7.3 | 4.6 |
| Average night temperature (°C) | 0.7 | 0.8 | 1.4 | 6.4 | 11.4 | 16.1 | 19.6 | 18.2 | 15.1 | 10.0 | 3.3 | 1.4 |
| Absolute minimum temperature (°C) | -7.0 | -9.2 | -7.5 | -1.2 | 3.5 | 11.0 | 16.8 | 12.4 | 10.6 | -2.5 | -7.8 | -6.7 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 4.0 | 7.8 | 7.1 | 9.4 | 10.2 | 10.8 | 11.6 | 11.3 | 10.4 | 7.5 | 7.8 | 4.9 |
| Precipitation (mm) | 131 | 44 | 176 | 90 | 79 | 97 | 78 | 113 | 36 | 72 | 31 | 66 |
| Sunny days | 7 | 16 | 13 | 15 | 17 | 15 | 8 | 14 | 16 | 17 | 24 | 13 |
| Rainy days | 22 | 12 | 15 | 15 | 14 | 15 | 23 | 17 | 14 | 14 | 6 | 17 |
| Snow days | 2 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Olean during the most sunny months:
The largest precipitation sum in Olean is at