Historical weather data, all-time temperature records, and monthly climate averages for Fortuna, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Fortuna is a coin-flip for rain — there's a 40% chance of precipitation on this date historically, with average temps running a mild 60° high and 43° low. The date has seen some wild swings though: a scorching 85° back in 1966, and just last year in 2023, a frost-threatening 31° low.
Fortuna's weather has real range for a coastal Northern California town — it's touched 104° as recently as September 2017, and plunged to 17° back in December 1932. The wettest single day on record dumped nearly 6 inches of rain (5.95") on December 10, 1939, and the town has even seen 5 inches of snow in a single day, in February 1989.
Fortuna is mild year-round, with average highs ranging only from 54° in late December to 71° in mid-August — pack a light jacket no matter when you visit. The driest and warmest stretch runs summer through early fall, while late December is both the coldest and wettest time of year, averaging over 2.5 inches of rain in a single week.