Olympic Peninsula Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Olympic Peninsula year round climate
Spring (March–May): Average 32–41°F, cold and humid climate, less rainfall, but staying warm is still necessary. Common activities: birdwatching, hiking (choose lower altitude routes). Recommended clothing: waterproof jacket, thermal underwear, thick sweater, waterproof pants.
Summer (June–August): Average 47–60°F, cool climate, very little rainfall, more sunny days. Common activities: beach activities, camping, hiking (higher altitude routes can be chosen). Recommended clothing: light and breathable clothing, sun protection clothing, rain gear (in case of occasional rain).
Autumn (September–November): Average 42–52°F, the climate turns cooler, rainfall gradually increases, and the weather is changeable. Common activities: viewing autumn leaves (in some areas), whale watching (depending on the season), hiking. Recommended clothing: warm jacket, waterproof jacket, long pants, comfortable hiking shoes.
Winter (December–February): Average -32–35°F, cold and humid climate, more rainfall, and snow may fall in some areas. Common activities: skiing (requires going to specific areas), birdwatching. Recommended clothing: warm waterproof jacket, hat, scarf, gloves, waterproof pants, warm boots.
Olympic Peninsula climatological average
Annual average temperature: approx. 41.5°F / Annual rainfall: approx. 128 mm / Summer humidity: 60%–70% / Rainiest month: December
Olympic Peninsula monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
31.1°F
16.6
February
31.1°F
8.9
March
32.4°F
7.7
April
34.3°F
5.1
May
41°F
3.7
June
47.7°F
4.4
July
60.3°F
0.6
August
57°F
2.9
September
52.7°F
4.5
October
42.1°F
15.9
November
33.4°F
28.5
December
35.2°F
29.6
Olympic Peninsula weather for the next seven days
12/15
Monday
Heavy rain
52.5°F/41.5°F
12/16
Tuesday
Heavy rain
48.2°F/42.1°F
12/17
Wednesday
Heavy rain
39.4°F/37.9°F
12/18
Thursday
Heavy rain
41.6°F/34.2°F
12/19
Friday
Patchy rain nearby
38.2°F/30.1°F
12/20
Saturday
Patchy rain nearby
37.6°F/33.2°F
12/21
Sunday
Patchy rain nearby
37°F/33.7°F
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