Hurricanes and Tornadoes That Hit Eureka, CA

The nearest NOAA station with 1991–2020 climate normals is Eureka WFO Woodley Island, CA, 2 miles north of Eureka at 20 feet. August is the warmest, with an average high of 64°F and low of 53°F; December is the coolest, at 55°F and 40°F. December is the wettest at 8.1 inches of precipitation on average and July and August the driest at 0.2 inches; the year adds up to 40.5 inches over 76 days with at least a tenth of an inch. Highs of 90°F are rare: fewer than one day a year on average. Lows fall below freezing on about 8 nights a year. That 40.5 inches is more than at 203 of the 226 California stations used on this site (90%). Fortuna, 13 miles south, has its own station (Scotia, CA): 47.7 inches a year, 7.2 more than here, and an August average high of 72°F against 64°F.

Water temperature at the NOAA tide station North Spit, CA, 3 miles west, averaged 56°F in August and 50°F in February over 2021–2025. No month averaged 80°F. Sea level at the North Spit tide gauge, 3 miles from Eureka, has risen 2.00 ± 0.14 inches per decade from 1977 to 2025, NOAA's linear trend; at that pace it is 20.0 inches in a hundred years. That is faster than at 119 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 56 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Eureka: 49 floods, 5 heavy rain events and 2 flash floods. None is recorded as killing or injuring anyone; the NWS estimated $32,000 in property and crop damage.

Flood insurance policyholders in Eureka's 2 ZIP codes have filed 42 claims with the National Flood Insurance Program since 1983, and were paid $1.6 million for buildings and contents, in the dollars of each year. 10% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 415 California cities on this site with 10 or more claims, 214 have fewer than Eureka.