Average annual temperature is 11.9 °C
Absolute maximum temperature: 38.8 °C
Absolute minimum temperature: -12.9 °C
Number of sunny days: 151 days
Number of rainy days: 194 days
Number of snow days: 20 days
Look at detailed online map of Bolu
* Weather data for Bolu Turkey is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 16.0 | 17.1 | 18.1 | 20.0 | 26.0 | 26.4 | 33.9 | 38.8 | 28.5 | 26.4 | 23.0 | 17.2 |
| Average daytime temperature (°C) | 9.6 | 5.9 | 10.8 | 13.9 | 17.4 | 22.0 | 26.5 | 29.7 | 24.6 | 20.3 | 13.9 | 11.6 |
| Average temperature (°C) | 3.7 | 1.1 | 6.2 | 8.9 | 12.9 | 17.5 | 20.7 | 23.2 | 18.3 | 14.1 | 9.4 | 6.1 |
| Average night temperature (°C) | -0.7 | -4.0 | 1.5 | 4.1 | 8.6 | 12.9 | 14.2 | 16.9 | 13.1 | 8.2 | 4.6 | 2.0 |
| Absolute minimum temperature (°C) | -3.7 | -12.9 | -9.5 | -0.2 | -0.1 | 9.7 | 10.4 | 13.8 | 8.6 | 4.0 | -5.0 | -1.8 |
| 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 | 10.7 | 11.9 | 13.3 | 14.5 | 15.0 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 6.5 | 5.9 | 5.3 | 7.1 | 8.2 | 11.9 | 12.8 | 11.7 | 11.0 | 8.9 | 5.0 | 6.2 |
| Precipitation (mm) | 34 | 80 | 151 | 174 | 125 | 120 | 87 | 10 | 19 | 57 | 223 | 96 |
| Sunny days | 20 | 10 | 4 | 2 | 6 | 5 | 17 | 22 | 19 | 21 | 9 | 16 |
| Rainy days | 9 | 3 | 25 | 28 | 25 | 25 | 14 | 9 | 11 | 10 | 20 | 15 |
| Snow days | 2 | 15 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Bolu during the most sunny months:
The largest precipitation sum in Bolu is at