Average annual temperature is 8.9 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -15.5 °C
Number of sunny days: 151 days
Number of rainy days: 192 days
Number of snow days: 22 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) | 10.6 | 12.1 | 13.9 | 15.3 | 21.8 | 23.2 | 30.0 | 34.3 | 25.7 | 21.8 | 18.3 | 12.3 |
| Average daytime temperature (°C) | 5.3 | 1.3 | 6.4 | 9.5 | 13.9 | 18.0 | 22.5 | 26.5 | 21.1 | 16.5 | 9.9 | 7.3 |
| Average temperature (°C) | 1.1 | -2.4 | 2.6 | 5.4 | 9.6 | 14.0 | 17.6 | 20.5 | 15.4 | 11.6 | 6.7 | 3.7 |
| Average night temperature (°C) | -2.1 | -6.5 | -1.5 | 1.5 | 5.5 | 9.4 | 12.2 | 14.8 | 10.3 | 7.0 | 3.5 | 1.0 |
| Absolute minimum temperature (°C) | -6.0 | -15.5 | -13.5 | -4.5 | -1.2 | 5.1 | 9.4 | 10.9 | 6.8 | 1.6 | -6.5 | -4.1 |
| 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 | 14.4 | 15.0 | 14.7 | 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) | 7.0 | 6.0 | 5.5 | 7.3 | 9.1 | 12.1 | 12.9 | 11.9 | 10.9 | 8.9 | 4.9 | 6.2 |
| Precipitation (mm) | 32 | 62 | 155 | 130 | 146 | 122 | 60 | 17 | 22 | 47 | 151 | 86 |
| Sunny days | 20 | 10 | 5 | 4 | 4 | 5 | 17 | 21 | 19 | 21 | 9 | 16 |
| Rainy days | 6 | 6 | 22 | 26 | 27 | 25 | 14 | 10 | 11 | 10 | 20 | 15 |
| Snow days | 5 | 12 | 4 | 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