Simi Valley, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Simi Valley, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 120°F (49°C) | September 6, 2020 |
| Record Low | 17.9°F (-8°C) | February 6, 1989 |
| Lowest High | 39.9°F (4°C) | January 29, 1957 |
| Highest Low | 78°F (26°C) | September 1, 2022 |
| Highest Mean | 96.0°F (36°C) | September 6, 2020 |
| Lowest Mean | 33.9°F (1°C) | January 28, 1957 |
| Precipitation | ||
| Max in One Calendar Day | 6.57" (166.9 mm) | November 29, 1970 |
| Max in One Month | 18.02" (457.7 mm) | February 1998 |
| Least in One Month | 0.00" (0.0 mm) | October 1949 |
| Max in One Year | 38.48" (977.5 mm) | 1983 |
| Least in One Year | 3.22" (81.7 mm) | 1953 |
| Snowfall | ||
| Max in One Calendar Day | 0.5" (1.3 cm) | February 8, 1989 |
| Max in One Month | 0.5" (1.3 cm) | February 1989 |
| Max in One Season | 0.5" (1.3 cm) | 1988-89 |
| Max in One Year | 0.5" (1.3 cm) | 1989 |
| Earliest Snow | 0.5" (1.3 cm) | February 8, 1989 |
| Earliest Measurable Snow | 0.5" (1.3 cm) | February 8, 1989 |
| Latest Snow | 0.5" (1.3 cm) | February 8, 1989 |
| Latest Measurable Snow | 0.5" (1.3 cm) | February 8, 1989 |
| Period of Record | ||
| Temperature | July 1, 1949 – July 21, 2026 | |
| Precipitation | July 1, 1949 – July 21, 2026 | |
| Snowfall | July 1, 1949 – December 31, 2010 | |
Note: Records compiled from NOAA GHCN-Daily observations at WOODLAND HILLS PIERCE COLLEGE (12 mi from Simi Valley, CA). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in Simi Valley, CA?
The all-time record high in Simi Valley, CA is 120°F (49°C), set on September 6, 2020.
What is the coldest temperature ever recorded in Simi Valley, CA?
The all-time record low in Simi Valley, CA is 17.9°F (-8°C), set on February 6, 1989.
What is the most rain Simi Valley, CA has ever had in one day?
The most precipitation recorded in one calendar day near Simi Valley, CA is 6.57 inches, on November 29, 1970.
What is the biggest snowfall ever recorded in Simi Valley, CA?
The most snow recorded in one calendar day near Simi Valley, CA is 0.5 inches, on February 8, 1989.
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