Hurricanes and Tornadoes That Hit Simi Valley, CA

The nearest NOAA station with 1991–2020 climate normals is Woodland Hills Pierce College, CA, 11 miles southeast of Simi Valley at 790 feet. August is the warmest, with an average high of 97°F and low of 61°F; December is the coolest, at 69°F and 42°F. February is the wettest at 4.6 inches of precipitation on average and July and August the driest at 0.0 inches; the year adds up to 16.5 inches over 22 days with at least a tenth of an inch. Highs reach 90°F on about 115 days a year, almost all from March to November. Lows fall below freezing on about 11 nights a year. That 16.5 inches is more than at 117 of the 226 California stations used on this site (52%). Moorpark, 8 miles west, has its own station (Camarillo Airport, CA): 12.0 inches a year, 4.5 less than here, and an August average high of 80°F against 97°F.

Water temperature at the NOAA tide station Santa Monica, CA, 23 miles southeast, averaged 69°F in August and 58°F in January and March over 2021–2025. No month averaged 80°F. Sea level at the Santa Monica tide gauge, 23 miles from Simi Valley, has risen 0.60 ± 0.06 inches per decade from 1933 to 2025, NOAA's linear trend; at that pace it is 6.0 inches in a hundred years. That is faster than at 28 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 14 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Simi Valley: 7 flash floods, 6 thunderstorm wind reports and 1 heavy rain event. They killed 1 person and injured 0. The strongest thunderstorm gust on record here was 71 mph, on February 17, 2026. August has had the most flash floods, 3 of 7. Of the 550 California cities on this site with a flash flood on record, 226 have had fewer than Simi Valley.

Flood insurance policyholders in Simi Valley's 2 ZIP codes have filed 95 claims with the National Flood Insurance Program since 1978, and were paid $159,000 for buildings and contents, in the dollars of each year. The most came from Pineapple Express - Southern in 1998: 18 claims (19% of all) and $32,000, then Flooding in 1995 with 13. 36% 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, 308 have fewer than Simi Valley.