Average annual temperature is 9.6 °C
Absolute maximum temperature: 31.0 °C
Absolute minimum temperature: -19.0 °C
Number of sunny days: 131 days
Number of rainy days: 199 days
Number of snow days: 35 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) | 13.1 | 16.8 | 13.8 | 27.9 | 29.9 | 30.9 | 31.0 | 29.8 | 30.2 | 27.3 | 16.1 | 13.3 |
| Average daytime temperature (°C) | 4.0 | 6.9 | 6.1 | 16.4 | 20.1 | 23.3 | 26.4 | 24.3 | 21.9 | 15.6 | 8.1 | 6.4 |
| Average temperature (°C) | 0.5 | 0.3 | 0.9 | 9.3 | 12.8 | 17.4 | 20.7 | 18.9 | 16.3 | 11.1 | 3.5 | 2.8 |
| Average night temperature (°C) | -2.1 | -4.2 | -3.1 | 3.6 | 6.2 | 12.1 | 15.8 | 14.9 | 12.0 | 7.5 | 0.1 | 0.2 |
| Absolute minimum temperature (°C) | -9.2 | -19.0 | -11.9 | -6.0 | -0.9 | 7.7 | 11.9 | 9.4 | 5.5 | -1.5 | -8.0 | -5.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 13.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.8 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 2.4 | 5.9 | 5.6 | 8.3 | 11.1 | 10.6 | 11.4 | 9.9 | 8.7 | 5.7 | 6.0 | 3.1 |
| Precipitation (mm) | 120 | 69 | 102 | 85 | 43 | 96 | 130 | 101 | 44 | 74 | 46 | 77 |
| Sunny days | 8 | 8 | 5 | 12 | 22 | 10 | 7 | 6 | 16 | 13 | 13 | 11 |
| Rainy days | 15 | 15 | 14 | 17 | 9 | 20 | 24 | 25 | 14 | 18 | 13 | 15 |
| Snow days | 8 | 5 | 12 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 5 |
The best time to visit Olean during the most sunny months:
The largest precipitation sum in Olean is at