Frost dates / California / Temecula

Frost dates in Temecula, CA

The station on this page is FALLBROOK 5 NE, CA US (USW00053151), 5 miles from the city point. Population in the Census 2024 estimate is 112,431.

Zone 9bUSDA average annual extreme minimum 25°F to 30°F, from ZIP 92591 (3.1 miles from the city point used on this page).

Median last 32°F is February 2. Median first 32°F is January 30. The 50% growing-season length is 365 days. The green band runs from the median last frost to the median first frost. Thin ticks mark the 10%, 50%, and 90% dates.

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

Last 32°F in spring

NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.

Probability	Date	How to read it
90%	December 26	Earlier date. A last 32°F on or after this day is common.
50%	February 2	Median.
10%	February 24	Later date. A last 32°F on or after this day is uncommon.

First 32°F in fall

NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.

Probability	Date	How to read it
10%	December 23	Earlier date. A first 32°F on or before this day is uncommon.
50%	January 30	Median.
90%	February 24	Later date. A first 32°F on or before this day is common.

32°F growing-season length

Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.

Probability the season is at least this long	Days
10%	365
50%	365
90%	356

36°F threshold

	10%	50%	90%
Last, on or after	March 6	February 7	December 21
First, on or before	December 11	January 1	February 17
Season at least	365 days	346 days	295 days

Station FALLBROOK 5 NE, CA US (USW00053151). Completeness flag R, 13 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 17.1%. Freeze dates are conditional on that threshold occurring. Elevation 347.5 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Planting calendar for Temecula · Zone 9b

Check a crop against this station

Temecula, CA

Zone 9bAverage annual extreme minimum 25°F to 30°F

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

California. Nearest qualified station: FALLBROOK 5 NE, CA US (USW00053151), 5 miles. Median last 32°F February 2. Median first 32°F January 30. The 50% growing-season length is 365 days.

Open the ZIP page · Crop guides for California

32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	February 24	February 2	December 26
First 32°F on or before	December 23	January 30	February 24

Column order matches the NCEI file: for the last freeze, 10% is the later date and 90% is the earlier date. How to read the probabilities.

A wall calendar surrounded by vegetables, herbs, seed packets, and watering cans.

Planting calendar

Windows below are from UC ANR, UC Master Gardener Program, Time of planting, retrieved 2026-10-10. North and North Coast = Monterey County north; South Coast = San Luis Obispo County south; Interior Valleys = Sacramento, San Joaquin, and similar valleys; Desert Valleys = Imperial and Coachella Valleys. Source line on the page: California Master Gardener Handbook, Table 13.2, Adapted from Vegetable Gardening Illustrated 1994.

Crop

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