When is the last spring frost in Hesperia, CA?

The median last 32°F date at the station on this page is March 18. NOAA’s 1991–2020 normals give a 50% chance the last spring minimum of 32°F or lower occurs on or after that date. The 90% date is February 23. The 10% date, the later one, is April 12. These are normals, not a forecast for this spring.

What USDA zone is Hesperia, CA?

The zone on this page is 8b, from ZIP 92345 in the 2023 PRISM table of the USDA Plant Hardiness Zone Map. That ZIP is 2.5 miles from the city point. USDA defines the zone as the average annual extreme minimum, shown here as 15°F to 20°F. It is a winter-cold band, not a frost date and not a forecast.

How far away is the weather station?

The station named on this page is 9.2 miles from the city point in a straight line. Frost dates are 1991–2020 NOAA climate normals for that instrument. They are not a National Weather Service forecast for one night, and they are not the temperature in every yard. The page names the station so the miles stay attached to the dates.

Frost dates in Hesperia, CA

Direct answer. In Hesperia, CA, the nearest qualified NOAA station is VICTORVILLE, CA US (USC00049325), 9.2 miles from the city point. The median last 32°F date is March 18, and the median first 32°F date is November 11, from the 1991–2020 U.S. Climate Normals. The 2023 USDA zone is 8b (15°F to 20°F), from ZIP 92345 in the PRISM table, 2.5 miles from the same city point.

Population in the Census 2024 estimate is 101,836. The station is VICTORVILLE, CA US (USC00049325).

Zone 8bUSDA average annual extreme minimum 15°F to 20°F, from ZIP 92345 (2.5 miles from the city point used on this page).

Median last 32°F is March 18. Median first 32°F is November 11. The 50% growing-season length is 233 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%	February 23	Earlier date. A last 32°F on or after this day is common.
50%	March 18	Median.
10%	April 12	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%	October 27	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 11	Median.
90%	November 26	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%	262
50%	233
90%	203

28°F threshold

	10%	50%	90%
Last, on or after	March 19	February 22	January 27
First, on or before	November 7	November 24	December 11
Season at least	306 days	273 days	241 days

36°F threshold

	10%	50%	90%
Last, on or after	April 30	April 11	March 22
First, on or before	October 16	November 1	November 14
Season at least	226 days	200 days	174 days

Station VICTORVILLE, CA US (USC00049325). Completeness flag R, 25 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 877.8 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Questions

When is the last spring frost in Hesperia, CA?: The median last 32°F date at the station on this page is March 18. NOAA’s 1991–2020 normals give a 50% chance the last spring minimum of 32°F or lower occurs on or after that date. The 90% date is February 23. The 10% date, the later one, is April 12. These are normals, not a forecast for this spring.
What USDA zone is Hesperia, CA?: The zone on this page is 8b, from ZIP 92345 in the 2023 PRISM table of the USDA Plant Hardiness Zone Map. That ZIP is 2.5 miles from the city point. USDA defines the zone as the average annual extreme minimum, shown here as 15°F to 20°F. It is a winter-cold band, not a frost date and not a forecast.
How far away is the weather station?: The station named on this page is 9.2 miles from the city point in a straight line. Frost dates are 1991–2020 NOAA climate normals for that instrument. They are not a National Weather Service forecast for one night, and they are not the temperature in every yard. The page names the station so the miles stay attached to the dates.

Planting calendar for Hesperia · Zone 8b

Check a crop against this station

Hesperia, CA

Zone 8bAverage annual extreme minimum 15°F to 20°F

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

California. Nearest qualified station: VICTORVILLE, CA US (USC00049325), 9.2 miles. Median last 32°F March 18. Median first 32°F November 11. The 50% growing-season length is 233 days.

Open the ZIP page · Crop guides for California

32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	April 12	March 18	February 23
First 32°F on or before	October 27	November 11	November 26

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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