Climate almanac
West Valley
Washington, United States · 46.59°, -120.61°
What is the climate like in West Valley?
The best time to visit West Valley is typically May – September, with trip comfort peaking in July (9.2/10). West Valley is warmest in July, when daily highs average 93°F (34°C), and coolest in January, when lows fall to about 27°F (-3°C). The wettest month is typically December and the driest is July; the year sees roughly 15 in (383 mm) of precipitation.
- Best time to visitMay – September — comfort peaks in July (9.2/10)
- Warmest monthJuly — average high 93°F (34°C)
- Coolest monthJanuary — average low 27°F (-3°C)
- Wettest monthDecember (3.0 in (77 mm))
- Driest monthJuly (0.1 in (1 mm))
- Annual precipitation15 in (383 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromYakima AP, 6 km away (1946-2026)