Sammamish, Washington Weather:
Sunday, September 20, 2026
Cloudy Weather
Day 72°
Night 48°
Precipitation 1 %
Wind 6 mph
UV Index (0 - 11+) 4
Weather Forecast History
Last Year's Weather on This Day (September 20, 2025)
Sunny Weather

Day

77°

Night

57°

Wind

6 mph

UV Index

40

Precipitation

6 %