Average annual temperature is 15.1 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: -7.2 °C
Number of sunny days: 171 days
Number of rainy days: 191 days
Number of snow days: 3 days
Look at detailed online map of Grethel
* Weather data for Grethel 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) | 20.7 | 26.0 | 25.7 | 29.5 | 29.4 | 32.8 | 37.7 | 35.0 | 34.1 | 30.2 | 26.2 | 20.3 |
| Average daytime temperature (°C) | 12.8 | 15.2 | 15.8 | 21.7 | 24.4 | 27.7 | 32.6 | 29.6 | 27.5 | 22.3 | 16.3 | 12.7 |
| Average temperature (°C) | 6.9 | 8.7 | 9.0 | 14.4 | 17.8 | 21.3 | 25.9 | 23.7 | 21.0 | 15.9 | 9.1 | 6.7 |
| Average night temperature (°C) | 3.0 | 3.9 | 3.7 | 8.2 | 12.1 | 15.7 | 20.2 | 19.0 | 15.5 | 10.8 | 4.0 | 2.5 |
| Absolute minimum temperature (°C) | -6.0 | -7.2 | -6.0 | 0.5 | 3.7 | 9.1 | 15.2 | 13.4 | 11.1 | 3.2 | -5.6 | -4.7 |
| 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 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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) | 4.9 | 7.0 | 7.7 | 9.8 | 10.2 | 11.4 | 11.8 | 10.1 | 10.0 | 8.0 | 7.5 | 5.7 |
| Precipitation (mm) | 98 | 105 | 61 | 62 | 71 | 50 | 57 | 135 | 45 | 43 | 43 | 91 |
| Sunny days | 10 | 14 | 18 | 20 | 13 | 13 | 6 | 10 | 14 | 17 | 21 | 15 |
| Rainy days | 20 | 13 | 12 | 10 | 18 | 17 | 25 | 21 | 16 | 14 | 9 | 16 |
| Snow days | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grethel during the most sunny months:
The largest precipitation sum in Grethel is at