Climate Insights for Arcata-Eureka Airport

The climate in Arcata-Eureka Airport is temperate. The average annual temperature is 11°C and approximately 1508mm of precipitation falls per year. January is the wettest month, receiving around 330mm of rainfall. Arcata-Eureka Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, July. The coldest months are December, February, January, when temperatures can drop to 4°C. Snowfall occurs from January to December, with around 79cm accumulating over the season.

Arcata-Eureka Airport sees moderate temperature variation throughout the year, ranging from 4°C to 22°C. August is the warmest month, though highs remain moderate at 22°C with a mean of 17°C. December is the coolest month, with minimum temperatures around 4°C and an average of 6°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between October and November, with a 3°C shift in average temperatures.

Arcata-Eureka Airport is a fairly wet location, receiving approximately 1508mm of precipitation annually, which averages out to around 126mm per month. The wettest month is January, averaging 330mm of rainfall. March and February also tend to see above-average precipitation. The driest month is August, with just 4mm. That's 326mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 79cm accumulating over the season. February typically sees the most snow at around 24cm.

Arcata-Eureka Airport is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently spring in Arcata-Eureka Airport, which began on March 20, 2026. Arcata-Eureka Airport is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 22°C, while the coldest stretch bottoms out in December near 4°C. Summer is next, beginning on June 21, 2026 — 3 days from now.

The best time to visit Arcata-Eureka Airport is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 12mm per month. By contrast, December can be quite cold with temperatures dropping to 4°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Arcata-Eureka Airport based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.