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West Lake Sammamish climate
Typical historical weather for West Lake Sammamish, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for West Lake Sammamish.
Annual average
10.6°C
across all months
Warmest month
24°C
Aug average high
Coolest month
1.3°C
Feb average low
Annual rainfall
1668mm
total per year
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
● Avg high● Avg low▮ Rainfall
Records on file
Hottest day
42.2°C
28 June 2021
Coldest day
-13.6°C
13 January 2024
Wettest day
90.7mm
10 December 2025
Windiest day
6.3m/s
4 November 2022
See the detail: West Lake Sammamish on 10 December 2025.