Average annual temperature is 5.6 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -30.6 °C
Number of sunny days: 199 days
Number of rainy days: 112 days
Number of snow days: 54 days
Look at detailed online map of Gretna
* Weather data for Gretna Canada is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | -0.2 | 3.3 | 2.5 | 12.9 | 30.4 | 36.4 | 32.2 | 31.3 | 33.2 | 28.0 | 10.8 | 8.3 |
| Average daytime temperature (°C) | -7.4 | -6.2 | -4.1 | 5.5 | 23.6 | 28.1 | 25.4 | 25.7 | 23.4 | 11.9 | 3.1 | 0.1 |
| Average temperature (°C) | -10.7 | -12.0 | -9.5 | 0.6 | 16.5 | 22.0 | 19.5 | 20.2 | 17.5 | 7.2 | -1.1 | -3.7 |
| Average night temperature (°C) | -13.5 | -16.9 | -13.8 | -3.8 | 9.6 | 16.5 | 14.1 | 15.5 | 12.6 | 3.4 | -4.2 | -6.8 |
| Absolute minimum temperature (°C) | -27.7 | -30.6 | -22.9 | -16.1 | -0.6 | 10.5 | 9.0 | 10.0 | 5.6 | -10.5 | -13.6 | -17.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.8 | 10.2 | 11.9 | 13.7 | 15.3 | 16.1 | 15.7 | 14.3 | 12.6 | 10.8 | 9.2 | 8.3 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.0 | 7.0 | 8.2 | 7.8 | 12.1 | 12.9 | 13.4 | 10.6 | 9.2 | 6.3 | 5.2 | 5.1 |
| Precipitation (mm) | 14 | 7 | 18 | 60 | 43 | 91 | 32 | 39 | 60 | 73 | 25 | 20 |
| Sunny days | 20 | 17 | 20 | 14 | 20 | 12 | 15 | 13 | 16 | 15 | 16 | 21 |
| Rainy days | 1 | 0 | 1 | 8 | 11 | 18 | 16 | 18 | 14 | 13 | 9 | 3 |
| Snow days | 10 | 11 | 10 | 8 | 0 | 0 | 0 | 0 | 0 | 3 | 5 | 7 |
The best time to visit Gretna during the most sunny months:
Months with the longest average daylight duration in Gretna:
The largest precipitation sum in Gretna is at