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 0.2–5°C, 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 8.7–15.7°C, 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 5.6–11.5°C, 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 -0.5–1.8°C, 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. 5.3°C / Annual rainfall: approx. 128 mm / Summer humidity: 60%–70% / Rainiest month: December
Olympic Peninsula monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-0.5°C
16.6
February
-0.5°C
8.9
March
0.2°C
7.7
April
1.3°C
5.1
May
5°C
3.7
June
8.7°C
4.4
July
15.7°C
0.6
August
13.9°C
2.9
September
11.5°C
4.5
October
5.6°C
15.9
November
0.8°C
28.5
December
1.8°C
29.6
Olympic Peninsula weather for the next seven days
1/30
Friday
Heavy rain
8.4°C/6.9°C
1/31
Saturday
Moderate rain
12.3°C/7.7°C
2/1
Sunday
Heavy rain
7.4°C/6.5°C
2/2
Monday
Heavy rain
6.6°C/6.2°C
2/3
Tuesday
Patchy rain nearby
15.5°C/6.9°C
2/4
Wednesday
Partly Cloudy
15.8°C/8.9°C
2/5
Thursday
Sunny
16.9°C/7°C
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