Oceanside, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Oceanside, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 104°F (40°C) | September 27, 1970 |
| Record Low | 28°F (-2°C) | February 8, 1974 |
| Lowest High | 51°F (11°C) | December 10, 1972 |
| Highest Low | 75.9°F (24°C) | August 28, 1983 and September 9, 1984 |
| Highest Mean | 86.4°F (30°C) | November 5, 1976 |
| Lowest Mean | 42.0°F (6°C) | January 17, 1987 and December 25, 1987 |
| Precipitation | ||
| Max in One Calendar Day | 4.21" (106.9 mm) | March 15, 2023 |
| Max in One Month | 8.80" (223.6 mm) | March 2023 |
| Least in One Month | 0.00" (0.0 mm) | July 1977 |
| Max in One Year | 23.85" (605.9 mm) | 1978 |
| Least in One Year | 3.18" (80.7 mm) | 1989 |
| Period of Record | ||
| Temperature | January 1, 1970 – May 31, 2026 | |
| Precipitation | January 1, 1970 – May 31, 2026 | |
| Snowfall | January 1, 1970 – December 31, 2010 | |
Note: Records compiled from NOAA GHCN-Daily observations at OCEANSIDE MARINA (2 mi from Oceanside, 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 Oceanside, CA?
The all-time record high in Oceanside, CA is 104°F (40°C), set on September 27, 1970.
What is the coldest temperature ever recorded in Oceanside, CA?
The all-time record low in Oceanside, CA is 28°F (-2°C), set on February 8, 1974.
What is the most rain Oceanside, CA has ever had in one day?
The most precipitation recorded in one calendar day near Oceanside, CA is 4.21 inches, on March 15, 2023.
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Oceanside Weather History
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California Weather Extremes
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