Rancho Cucamonga, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Rancho Cucamonga, from NOAA daily weather observations.
Station: TANBARK CALIFORNIA
| Temperature | ||
|---|---|---|
| Record High | 109°F (43°C) | July 22, 2006 and September 6, 2020 |
| Record Low | 18.8°F (-7°C) | March 12, 1986 |
| Lowest High | 30.9°F (-1°C) | December 24, 1987 |
| Highest Low | 87°F (31°C) | July 6, 2018 and September 6, 2024 |
| Highest Mean | 97°F (36°C) | July 6, 2018 |
| Lowest Mean | 26.4°F (-3°C) | December 25, 1987 |
| Period of Record | ||
| Temperature | February 12, 1986 – August 2, 2026 | |
Note: Records compiled from NOAA GHCN-Daily observations at TANBARK CALIFORNIA (12 mi from Rancho Cucamonga, 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 Rancho Cucamonga, CA?
The all-time record high in Rancho Cucamonga, CA is 109°F (43°C), set on July 22, 2006 and September 6, 2020.
What is the coldest temperature ever recorded in Rancho Cucamonga, CA?
The all-time record low in Rancho Cucamonga, CA is 18.8°F (-7°C), set on March 12, 1986.
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