Average annual temperature is 10.6 °C
Absolute maximum temperature: 27.8 °C
Absolute minimum temperature: -5.2 °C
Number of sunny days: 187
Number of rainy days: 178
Number of snow days:
Average annual precipitation: 721 mm
Look at detailed online map of Friday Harbor
* Weather data for Friday Harbor United States is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 11.3 | 10.1 | 14.4 | 16.7 | 26.1 | 22.4 | 27.4 | 27.8 | 21.5 | 18.9 | 15.6 | 13 |
| Average daytime temperature (°C) | 7.6 | 6.5 | 8.9 | 10.5 | 17.6 | 18.5 | 21.5 | 22.2 | 17.7 | 13.8 | 9.5 | 9 |
| Average temperature (°C) | 6 | 4.5 | 6 | 7.7 | 13.4 | 14.3 | 16.8 | 17.8 | 14.2 | 11 | 7.6 | 7.3 |
| Average night temperature (°C) | 4.6 | 2.8 | 3.7 | 5.7 | 10.2 | 11.2 | 12.8 | 14.4 | 11.6 | 8.9 | 6 | 5.8 |
| Absolute minimum temperature (°C) | -1.9 | -5.2 | -0.9 | 1.8 | 6.6 | 9.1 | 10.3 | 11.8 | 7.6 | 2.8 | 1.7 | 2.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.4 | 11 | 12.8 | 14.5 | 15.8 | 16.1 | 16.1 | 15.1 | 13.4 | 11.7 | 9.9 | 8.6 |
| Daylight mean duration (h) | 8.8 | 10.2 | 11.9 | 13.7 | 15.2 | 16.1 | 15.7 | 14.3 | 12.6 | 10.8 | 9.2 | 8.4 |
| Daylight minimum duration (h) | 8.4 | 9.5 | 11 | 12.9 | 14.6 | 15.9 | 15.1 | 13.5 | 11.8 | 10 | 8.6 | 8.3 |
| Sunshine mean duration (h) | 4.3 | 4.7 | 7.9 | 7.8 | 12.3 | 12.8 | 13.8 | 11.9 | 9.4 | 6.5 | 4.8 | 3.4 |
| Precipitation (mm) | 67 | 72 | 48 | 74 | 18 | 15 | 11 | 20 | 36 | 98 | 106 | 155 |
| Sunny days | 9 | 6 | 11 | 7 | 24 | 21 | 29 | 24 | 19 | 16 | 15 | 6 |
| Rainy days | 22 | 22 | 20 | 23 | 7 | 9 | 2 | 7 | 11 | 15 | 15 | 25 |
The best time to visit Friday Harbor during the most sunny months:
Months with the longest average daylight duration in Friday Harbor:
The largest precipitation sum in Friday Harbor is at