Sammamish, Washington Weather:
Friday, September 18, 2026
Cloudy Weather
Day 72°
Night 50°
Precipitation 0 %
Wind 4 mph
Weather Forecast History
Last Year's Weather on This Day (September 18, 2025)
Sunny Weather

Day

72°

Night

50°

Wind

6 mph

UV Index

40

Precipitation

1 %