Arcata/Eureka weather by month & the best time to visit
United States · seaside town · oceanic / maritime climate
The best time to visit Arcata/Eureka is August — its sunniest month (Sunshine Score 61/100), with September and July close behind. Arcata/Eureka averages about 2,478 hours of sunshine a year. Daytime highs around 16°C / 61°F and roughly 7 mm of rain in August.
When is the best time to visit Arcata/Eureka?
For sunshine, the best time to visit Arcata/Eureka is August, then September and July. The dullest month is January (16/100, 194 mm of rain). The full month-by-month picture is in the table below.
How sunny is Arcata/Eureka?
Arcata/Eureka gets a moderate 2,478 hours of sunshine a year. 45 Sunshine Score points separate August (61) from January (16), so the month you pick matters. It ranks #214 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. Rain has a clear season: the wettest stretch, around January, carries about 51% of the annual 1,217 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 16 | 11° / 52°F | 9° / 48°F | 194 mm | 1 | 12° / 54°F |
| February | 16 | 11° / 52°F | 9° / 48°F | 157 mm | 2 | 12° / 54°F |
| March | 16 | 11° / 52°F | 9° / 48°F | 171 mm | 4 | 12° / 54°F |
| April | 25 | 12° / 54°F | 9° / 48°F | 95 mm | 6 | 12° / 54°F |
| May | 36 | 13° / 55°F | 11° / 52°F | 44 mm | 7 | 11° / 52°F |
| June | 45 | 14° / 57°F | 12° / 54°F | 21 mm | 8 | 11° / 52°F |
| July | 54 | 15° / 59°F | 13° / 55°F | 7 mm | 8 | 13° / 55°F |
| August | 61 | 16° / 61°F | 13° / 55°F | 7 mm | 7 | 13° / 55°F |
| September | 59 | 16° / 61°F | 13° / 55°F | 23 mm | 6 | 13° / 55°F |
| October | 46 | 15° / 59°F | 12° / 54°F | 77 mm | 4 | 12° / 54°F |
| November | 28 | 13° / 55°F | 11° / 52°F | 149 mm | 2 | 12° / 54°F |
| December | 22 | 12° / 54°F | 9° / 48°F | 272 mm | 1 | 12° / 54°F |
Sea temperature in Arcata/Eureka by month
The sea off Arcata/Eureka is warmest in July at around 13°C / 55°F, and coolest in May at 11°C / 52°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Arcata/Eureka: questions and answers
What kind of destination is Arcata/Eureka?
Arcata/Eureka is a seaside town in United States with a oceanic / maritime climate — the sea reaches 13°C at its warmest.
How many hours of sunshine does Arcata/Eureka get a year?
Arcata/Eureka gets about 2,478 hours of sunshine a year, at its best around August.
When is the best time to visit Arcata/Eureka?
The sunniest time to visit Arcata/Eureka is August, when the Sunshine Score peaks at 61/100 (with September and July close behind). Expect daytime highs around 16°C / 61°F.
What is the least sunny month in Arcata/Eureka?
January is the least sunny month in Arcata/Eureka, scoring 16/100 with about 194 mm of rain.
What is the sea temperature in Arcata/Eureka?
The sea in Arcata/Eureka ranges from about 11°C (May) to 13°C (July). Month-by-month sea temperatures are on this page.
How strong is the sun in Arcata/Eureka?
The typical midday UV index in Arcata/Eureka peaks around 8 (very high) in June, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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