Sammamish, Washington Weather:
Wednesday, September 30, 2026
Sunny Weather
Day 63°
Night 39°
Precipitation 90 %
Wind 9 mph
Weather Forecast History
Last Year's Weather on This Day (September 30, 2025)
Partly Sunny with Showers

Day

68°

Night

52°

Wind

11 mph

UV Index

30

Precipitation

67 %