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Will it freeze in Jurupa Valley in the next 7 nights?
No overnight lows at or below 32°F are forecast in Jurupa Valley during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 56°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 56°F Above 36°F · Mostly Clear
- Fri, Nov 6 57°F Above 36°F · Clear
- Sat, Nov 7 58°F Above 36°F · Clear
- Sun, Nov 8 59°F Above 36°F · Mostly Clear
- Mon, Nov 9 59°F Above 36°F · Mostly Clear
- Tue, Nov 10 57°F Above 36°F · Mostly Clear
- Wed, Nov 11 57°F Above 36°F · Slight Chance Rain Showers
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Jurupa Valley
Most years have no 28°F hard freeze at Riverside Municipal Airport, according to NOAA’s 1991–2020 Climate Normals. Check the short-term forecast above during cold snaps.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Jan 2 · Feb 13 · Mar 13 | Nov 23 · Dec 12 · Jan 9 | 305 days |
| 32°F freeze | Dec 16 · Jan 9 · Feb 21 | Dec 5 · Dec 30 · Feb 6 | 362 days |
| 28°F hard freeze | rare in most years | rare in most years | 365 days |
Average high temperature by month
1991–2020 normals at Riverside Municipal Airport
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Jurupa Valley, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Riverside Municipal Airport (station USW00003171, elevation 805 ft), 3.9 mi from Jurupa Valley. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Jurupa Valley
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Riverside, CA | 6.2 mi | Jan 9 | Dec 25 |
| Eastvale, CA | 6.8 mi | Jan 17 | Dec 19 |
| Norco, CA | 7.5 mi | Jan 17 | Dec 19 |
| Fontana, CA | 7.5 mi | rare | rare |
| Ontario, CA | 8.1 mi | rare | rare |
| Colton, CA | 8.7 mi | rare | rare |
| Grand Terrace, CA | 9.3 mi | rare | rare |
| Rialto, CA | 9.3 mi | rare | rare |
| Rancho Cucamonga, CA | 11 mi | rare | rare |
| Corona, CA | 11 mi | Jan 17 | Dec 19 |
Frequently asked questions
When is the last frost in Jurupa Valley?
On average, the last spring frost (32°F) in Jurupa Valley is around January 9. In about 1 year in 10 it comes after February 21, and in 9 years in 10 it comes after December 16.
When is the first frost in Jurupa Valley?
The first fall frost (32°F) usually arrives around December 30. There’s a 10% chance of a freeze by December 5 and a 90% chance by February 6.
Can it frost in Jurupa Valley after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after February 13.
What growing zone is Jurupa Valley?
Jurupa Valley is in USDA Plant Hardiness Zone 10a (average annual extreme minimum temperature 30 to 35°F), based on the 2023 USDA map for ZIP code 92509. See growing zones in California.
More: all California frost dates · California growing zones · UV index today in Jurupa Valley · frost vs. freeze