Hurricanes and Tornadoes That Hit Vallejo, CA

The nearest NOAA station with 1991–2020 climate normals is Napa Co Airport, CA, 7 miles northwest of Vallejo at 14 feet. August is the warmest, with an average high of 80°F and low of 54°F; December is the coolest, at 57°F and 38°F. January is the wettest at 4.2 inches of precipitation on average and July and August the driest at 0.0 inches; the year adds up to 20.3 inches over 37 days with at least a tenth of an inch. Highs reach 90°F on about 16 days a year, almost all from May to October. Lows fall below freezing on about 34 nights a year. That 20.3 inches is more than at 143 of the 226 California stations used on this site (63%). Crockett, 4 miles south, has its own station (Martinez Wtp, CA): 19.4 inches a year, 0.9 less than here, and an August average high of 87°F against 80°F.

Water temperature at the NOAA tide station Martinez-Amorco Pier, CA, 8 miles southeast, averaged 71°F in August and 51°F in January over 2021–2025. No month averaged 80°F. Sea level at the Port Chicago tide gauge, 11 miles from Vallejo, has risen 0.77 ± 0.23 inches per decade from 1976 to 2025, NOAA's linear trend; at that pace it is 7.7 inches in a hundred years. That is faster than at 36 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 13 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Vallejo: 12 floods and 1 heavy rain event. None is recorded as killing or injuring anyone; the NWS estimated $30,000 in property and crop damage.

Flood insurance policyholders in Vallejo's 3 ZIP codes have filed 151 claims with the National Flood Insurance Program since 1978, and were paid $1.1 million for buildings and contents, in the dollars of each year. The most came from Flooding in 1986: 63 claims (42% of all) and $453,000. 47% 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, 354 have fewer than Vallejo.