Average annual temperature is 9.5 °C
Absolute maximum temperature: 32.9 °C
Absolute minimum temperature: -7.5 °C
Number of sunny days: 138 days
Number of rainy days: 206 days
Number of snow days: 21 days
Look at detailed online map of Grom
* Weather data for Grom Poland is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 14.4 | 8.0 | 15.4 | 19.9 | 24.6 | 29.3 | 31.2 | 32.9 | 28.2 | 22.6 | 12.3 | 7.4 |
| Average daytime temperature (°C) | 3.3 | 3.1 | 7.0 | 11.9 | 18.0 | 22.8 | 23.4 | 24.3 | 22.6 | 12.6 | 5.0 | 2.4 |
| Average temperature (°C) | 1.7 | 0.6 | 3.1 | 7.6 | 13.1 | 18.1 | 18.9 | 20.0 | 17.8 | 9.6 | 2.7 | 0.7 |
| Average night temperature (°C) | -0.2 | -2.0 | -0.5 | 3.2 | 7.2 | 12.5 | 13.8 | 15.8 | 13.1 | 6.5 | 0.3 | -1.3 |
| Absolute minimum temperature (°C) | -7.0 | -5.9 | -5.0 | -3.6 | 0.9 | 5.1 | 11.3 | 10.9 | 9.7 | 1.9 | -7.5 | -7.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 8.0 | 10.0 | 12.0 | 15.0 | 16.0 | 17.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 7.0 |
| Daylight mean duration (h) | 8.1 | 9.8 | 11.9 | 14.0 | 15.9 | 17.0 | 16.5 | 14.8 | 12.7 | 10.6 | 8.6 | 7.6 |
| Daylight minimum duration (h) | 7.0 | 8.0 | 10.0 | 13.0 | 15.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 7.0 | 7.0 |
| Sunshine mean duration (h) | 1.3 | 4.3 | 6.6 | 8.0 | 11.3 | 12.1 | 12.4 | 9.9 | 10.0 | 4.5 | 3.2 | 1.5 |
| Precipitation (mm) | 70 | 50 | 50 | 56 | 22 | 44 | 52 | 54 | 24 | 86 | 65 | 79 |
| Sunny days | 11 | 13 | 8 | 10 | 24 | 15 | 5 | 9 | 20 | 6 | 11 | 6 |
| Rainy days | 15 | 12 | 19 | 19 | 7 | 15 | 26 | 22 | 10 | 25 | 14 | 22 |
| Snow days | 5 | 3 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 3 |
The best time to visit Grom during the most sunny months:
Months with the longest average daylight duration in Grom:
The largest precipitation sum in Grom is at