Temperature
Cool by day, brisk at night.
Arcata is usually most comfortable from June to September. Typical daytime highs range from 55–72°F across the year. Rain varies by season.

Cool by day, brisk at night.
Several rainy days. About 13 wet days, more than in most months.
A mix of sunshine and cloud.
In November, afternoons feel about 54° and nights feel near 45°.
Mostly cloudy skies this month.
Calm winds are typical in November.
November late afternoons are around 57°F, easing to about 53°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 56 | 45 | 8.6 | 15 | 6.0 | 82 |
| Feb | 57 | 46 | 7.2 | 13 | 7.4 | 82 |
| Mar | 58 | 47 | 7.4 | 15 | 8.6 | 81 |
| Apr | 60 | 48 | 4.4 | 12 | 10.5 | 81 |
| May | 63 | 51 | 2.5 | 8 | 12.1 | 82 |
| Jun | 67 | 54 | 1.0 | 4 | 13.5 | 82 |
| Jul | 71 | 57 | 0.1 | 1 | 14.1 | 80 |
| Aug | 72 | 58 | 0.2 | 1 | 12.9 | 80 |
| Sep | 71 | 56 | 0.6 | 2 | 11.7 | 79 |
| Oct | 66 | 53 | 3.2 | 6 | 9.5 | 80 |
| Nov | 59 | 48 | 6.1 | 13 | 7.2 | 82 |
| Dec | 55 | 45 | 10.1 | 15 | 5.7 | 82 |
Similar climates
Want a side-by-side climate view? Compare Arcata with New York City.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 27, 2026
Data & methodology