Average annual temperature is 10.1 °C
Absolute maximum temperature: 32.3 °C
Absolute minimum temperature: -7.5 °C
Number of sunny days: 158 days
Number of rainy days: 205 days
Number of snow days: 2 days
Look at detailed online map of West Lake Sammamish
* Weather data for West Lake Sammamish 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) | 12.4 | 12.7 | 16.8 | 24.2 | 30.3 | 28.5 | 29.7 | 32.3 | 25.8 | 24.9 | 14.6 | 13.6 |
| Average daytime temperature (°C) | 7.4 | 6.8 | 10.0 | 11.7 | 20.5 | 21.9 | 25.9 | 26.3 | 20.5 | 15.5 | 9.7 | 9.0 |
| Average temperature (°C) | 4.1 | 2.8 | 4.5 | 6.7 | 13.9 | 14.9 | 18.7 | 19.3 | 14.4 | 10.4 | 5.5 | 5.8 |
| Average night temperature (°C) | 1.5 | 0.0 | 0.7 | 3.2 | 8.6 | 9.6 | 12.6 | 13.8 | 10.5 | 7.0 | 2.7 | 3.2 |
| Absolute minimum temperature (°C) | -6.4 | -7.5 | -4.6 | -0.7 | 4.9 | 6.6 | 9.9 | 10.6 | 5.8 | -2.6 | -3.7 | -2.6 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.9 | 10.3 | 11.9 | 13.6 | 15.1 | 15.9 | 15.5 | 14.2 | 12.6 | 10.9 | 9.3 | 8.5 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.6 | 4.5 | 7.0 | 6.3 | 10.3 | 11.0 | 12.9 | 11.1 | 7.5 | 6.1 | 5.2 | 2.9 |
| Precipitation (mm) | 122 | 91 | 121 | 186 | 31 | 49 | 7 | 51 | 122 | 98 | 208 | 276 |
| Sunny days | 4 | 9 | 7 | 5 | 17 | 20 | 24 | 20 | 12 | 17 | 15 | 8 |
| Rainy days | 26 | 18 | 24 | 25 | 14 | 10 | 7 | 11 | 18 | 14 | 15 | 23 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit West Lake Sammamish during the most sunny months:
Months with the longest average daylight duration in West Lake Sammamish:
The largest precipitation sum in West Lake Sammamish is at