Mill Plain

What is the climate like in Mill Plain?

The best time to visit Mill Plain is typically July – August, with trip comfort peaking in July (9.0/10). Mill Plain is warmest in August, when daily highs average 84°F (29°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 76 in (1925 mm) of precipitation.

• Best time to visitJuly – August — comfort peaks in July (9.0/10)
• Warmest monthAugust — average high 84°F (29°C)
• Coolest monthFebruary — average low 36°F (2°C)
• Wettest monthDecember (12 in (305 mm))
• Driest monthJuly (0.4 in (10 mm))
• Annual precipitation76 in (1925 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromVancouver 4 Nne, 13 km away (1891-2026)