Sammamish

What is the climate like in Sammamish?

The best time to visit Sammamish is typically July – August, with trip comfort peaking in July (8.2/10). Sammamish is warmest in August, when daily highs average 77°F (25°C), and coolest in February, when lows fall to about 36°F (2°C). The wettest month is typically December and the driest is July; the year sees roughly 71 in (1802 mm) of precipitation.

• Best time to visitJuly – August — comfort peaks in July (8.2/10)
• Warmest monthAugust — average high 77°F (25°C)
• Coolest monthFebruary — average low 36°F (2°C)
• Wettest monthDecember (10 in (261 mm))
• Driest monthJuly (1.1 in (29 mm))
• Annual precipitation71 in (1802 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSeattle Sand Pt Wfo, 14 km away (1986-2026)