Average annual temperature is 14.7 °C
Absolute maximum temperature: 39.8 °C
Absolute minimum temperature: -10.7 °C
Number of sunny days: 206 days
Number of rainy days: 157 days
Number of snow days: 2 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) | 17.4 | 20.5 | 24.4 | 28.2 | 32.1 | 39.1 | 38.2 | 39.8 | 35.0 | 31.4 | 26.7 | 17.8 |
| Average daytime temperature (°C) | 8.5 | 11.7 | 13.0 | 21.0 | 26.6 | 30.8 | 32.6 | 31.5 | 28.8 | 20.9 | 15.0 | 10.7 |
| Average temperature (°C) | 3.2 | 5.0 | 6.7 | 13.6 | 19.7 | 23.9 | 26.1 | 25.4 | 21.9 | 15.4 | 8.9 | 6.0 |
| Average night temperature (°C) | -0.5 | 0.2 | 2.1 | 7.6 | 13.7 | 17.9 | 20.9 | 20.8 | 16.4 | 10.9 | 4.2 | 2.8 |
| Absolute minimum temperature (°C) | -10.7 | -10.4 | -7.8 | 0.7 | 6.3 | 12.0 | 17.1 | 14.3 | 11.2 | -1.8 | -5.5 | -4.4 |
| 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 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.5 | 13.6 | 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) | 5.5 | 7.5 | 7.0 | 10.4 | 11.0 | 12.5 | 11.4 | 10.3 | 10.6 | 7.8 | 7.6 | 5.9 |
| Precipitation (mm) | 86 | 103 | 126 | 19 | 51 | 43 | 97 | 133 | 26 | 59 | 19 | 74 |
| Sunny days | 19 | 17 | 14 | 24 | 14 | 17 | 11 | 16 | 16 | 19 | 24 | 15 |
| Rainy days | 10 | 11 | 17 | 6 | 17 | 13 | 20 | 15 | 14 | 12 | 6 | 16 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Olean during the most sunny months:
The largest precipitation sum in Olean is at