Average annual temperature is 4.9 °C
Absolute maximum temperature: 22.0 °C
Absolute minimum temperature: -16.5 °C
Number of sunny days: 88 days
Number of rainy days: 237 days
Number of snow days: 40 days
Look at detailed online map of Port San Juan
* Weather data for Port San Juan 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) | 4.8 | 3.0 | 4.2 | 9.0 | 13.8 | 21.2 | 22.0 | 21.1 | 17.4 | 12.3 | 8.4 | 5.6 |
| Average daytime temperature (°C) | 2.9 | 1.1 | 1.6 | 4.2 | 6.9 | 12.4 | 16.5 | 17.2 | 13.6 | 8.5 | 3.9 | 0.1 |
| Average temperature (°C) | 1.4 | -0.9 | -0.8 | 1.9 | 5.2 | 10.2 | 13.4 | 14.2 | 9.6 | 5.3 | 1.6 | -3.2 |
| Average night temperature (°C) | -0.1 | -3.4 | -3.1 | -0.3 | 3.5 | 8.4 | 10.8 | 11.9 | 6.8 | 2.8 | -0.6 | -8.0 |
| Absolute minimum temperature (°C) | -9.1 | -11.3 | -8.6 | -4.1 | -0.5 | 4.4 | 7.3 | 6.6 | 2.1 | -4.0 | -14.2 | -16.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 7.0 | 10.0 | 13.0 | 15.0 | 18.0 | 18.0 | 18.0 | 16.0 | 14.0 | 11.0 | 8.0 | 6.0 |
| Daylight mean duration (h) | 6.8 | 9.1 | 11.8 | 14.6 | 17.2 | 18.7 | 18.0 | 15.6 | 12.9 | 10.1 | 7.5 | 6.0 |
| Daylight minimum duration (h) | 6.0 | 7.0 | 10.0 | 13.0 | 15.0 | 18.0 | 16.0 | 14.0 | 11.0 | 8.0 | 6.0 | 5.0 |
| Sunshine mean duration (h) | 1.3 | 4.0 | 6.6 | 7.1 | 4.7 | 5.6 | 7.5 | 6.7 | 7.0 | 4.0 | 2.0 | 1.5 |
| Precipitation (mm) | 374 | 174 | 180 | 139 | 390 | 291 | 227 | 411 | 242 | 292 | 394 | 304 |
| Sunny days | 5 | 6 | 16 | 9 | 2 | 4 | 11 | 8 | 7 | 12 | 3 | 5 |
| Rainy days | 25 | 11 | 6 | 14 | 29 | 26 | 20 | 23 | 23 | 19 | 25 | 16 |
| Snow days | 1 | 11 | 9 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 10 |
The best time to visit Port San Juan during the most sunny months:
Months with the longest average daylight duration in Port San Juan:
The largest precipitation sum in Port San Juan is at