Best time to visit Prosser, WA

A month-by-month travel weather guide based on NOAA 30-year climate normals.

The most comfortable travel window in Prosser runs from April through June — 3 months of pleasant temperatures and modest rainfall.

January Cold
High
40.1°F
Low
26.8°F
Precip
1.24 in

Winter weather. Plan around weather; good for snow sports if applicable.

Daylight ≈ 8h 48m

February Cool
High
46.7°F
Low
28.6°F
Precip
0.90 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 10h 6m

March Cool
High
55.9°F
Low
34.9°F
Precip
0.69 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 11h 40m

April Good
High
64.6°F
Low
39.9°F
Precip
0.74 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 13h 20m

May Good
High
74.1°F
Low
47.9°F
Precip
0.88 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 14h 46m

June Good
High
80.9°F
Low
53.6°F
Precip
0.68 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 15h 31m

July Hot
High
90.4°F
Low
59.5°F
Precip
0.21 in

Summer heat. Avoid midday exertion; aim for morning and evening activities.

Daylight ≈ 15h 14m

August Hot
High
89.2°F
Low
57.7°F
Precip
0.16 in

Summer heat. Avoid midday exertion; aim for morning and evening activities.

Daylight ≈ 13h 59m

September Excellent
High
79.7°F
Low
50.1°F
Precip
0.27 in

Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.

Daylight ≈ 12h 19m

October Good
High
64.7°F
Low
40.8°F
Precip
0.77 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 10h 39m

November Cool
High
49.3°F
Low
31.7°F
Precip
0.86 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 9h 10m

December Cold
High
39.5°F
Low
26.3°F
Precip
1.33 in

Winter weather. Plan around weather; good for snow sports if applicable.

Daylight ≈ 8h 26m

Looking for similar climates? See Prosser's climate twins. Or jump straight to the full climate profile.