Best time to visit Grand Coulee, WA
A month-by-month travel weather guide based on NOAA 30-year climate normals.
The most comfortable travel window in Grand Coulee runs from May through October — 6 months of pleasant temperatures and modest rainfall.
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 8h 36m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 59m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 11h 39m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 13h 25m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 57m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 15h 46m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 15h 27m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 6m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 12h 20m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 10h 34m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 8h 59m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 8h 12m
Looking for similar climates? See Grand Coulee's climate twins. Or jump straight to the full climate profile.