Climate Overview
The climate in Arcata-Eureka Airport is temperate. The average annual temperature is 12°C and approximately 1349mm of precipitation falls per year. January is the wettest month, receiving around 255mm 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: September, August, October. The coldest months are March, February, April, when temperatures can drop to 9°C.
Temperature
Arcata-Eureka Airport has relatively stable temperatures year-round, staying within a 6°C range. September is the warmest month, though highs remain moderate at 15°C with a mean of 14°C. March is the coolest month, with minimum temperatures around 9°C and an average of 10°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.
Precipitation
Arcata-Eureka Airport is a fairly wet location, receiving approximately 1349mm of precipitation annually, which averages out to around 112mm per month. The wettest month is January, averaging 255mm of rainfall. December and March also tend to see above-average precipitation. The driest month is July, with just 6mm. That's 249mm 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.
Wind
Arcata-Eureka Airport is moderately windy, with an average annual wind speed of 26km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 31km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in August, with average winds dropping to 21km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 10km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 30km/h in winter, 29km/h in spring, 23km/h in summer, 24km/h in autumn.
Seasons
88 days until Summer
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 September at around 15°C, while the coldest stretch bottoms out in March near 9°C. Summer is next, beginning on June 21, 2026 — 88 days from now.
Spring
Temperatures range from 9 to 12°C. Rainfall is heavy, totalling around 346mm across the season with a monthly average of 115mm. Winds are strong, averaging 29km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 11 to 14°C. Precipitation is minimal, with only around 32mm for the entire season. Winds are moderate at around 23km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 11 to 15°C. Precipitation is moderate at around 282mm for the season, averaging 94mm per month. Winds are moderate at around 24km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 9 to 12°C. Rainfall is heavy, totalling around 689mm across the season with a monthly average of 230mm. Winds are strong, averaging 30km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
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. 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.
