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Olympic Peninsula

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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

12/15
Monday
Heavy rain
11.4°C/5.3°C
12/16
Tuesday
Heavy rain
9°C/5.6°C
12/17
Wednesday
Heavy rain
4.1°C/3.3°C
12/18
Thursday
Heavy rain
5.3°C/1.2°C
12/19
Friday
Patchy rain nearby
3.5°C/-1°C
12/20
Saturday
Patchy rain nearby
3.1°C/0.7°C
12/21
Sunday
Patchy rain nearby
2.8°C/1°C