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Eureka
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Eureka Weather and climate
Data source：Meteostat
Update date：2025-09
Eureka year round climate
- Spring (March–May): Average 8.7–11.6°C, cool and rainy, especially in March. Common activities: Hiking (bring rain gear), enjoying coastal scenery. Suggested clothing: Waterproof jacket, warm clothing, long pants.
- Summer (June–August): Average 13.3–15.6°C, mild and dry. Common activities: Camping, beach activities, exploring Redwood National Park. Suggested clothing: Light and breathable clothing, comfortable shoes.
- Autumn (September–November): Average 12.6–14.6°C, comfortable, rainfall gradually increases, especially in November. Common activities: Enjoying autumn scenery, outdoor walks. Suggested clothing: Light jacket, long-sleeved shirt.
- Winter (December–February): Average 8.2–9.5°C, cold and humid, heavy rainfall, especially in December. Common activities: Indoor activities, museum visits. Suggested clothing: Thick jacket, warm clothing, waterproof boots.
Eureka climatological average
Annual average temperature: approx. 11.5°C / Annual rainfall: approx. 1087 mm / Summer humidity: 70%–80% / Rainiest month: December
Eureka monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
9.5°C
183
February
8.2°C
128
March
8.7°C
154
April
9.6°C
71.3
May
11.6°C
57
June
13.3°C
21.7
July
14.8°C
7
August
15.6°C
13.5
September
14.6°C
20
October
12.6°C
39.7
November
9.7°C
170
December
9.5°C
222
Eureka weather for the next seven days
10/16
Thursday
Overcast
13.9°C/9.9°C
10/17
Friday
Sunny
17.8°C/11°C
10/18
Saturday
Partly Cloudy
14.8°C/10.9°C
10/19
Sunday
Moderate rain
13.6°C/10.2°C
10/20
Monday
Patchy rain nearby
14°C/8.8°C
10/21
Tuesday
Sunny
14.6°C/7.9°C
10/22
Wednesday
Sunny
16.4°C/9.1°C
