Frost Dates for La Verne, CA 91750

Last spring frost January 19 · First fall frost November 17 · 302 frost-free days · USDA Zone 10a

Frost probability for 91750

Frost10%50%90%
Spring (last frost)March 5January 19—
Fall (first frost)December 1November 17—

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (7.5 km away); the 50% date is the median year.

Month by month in La Verne

MonthWhat to do
JanuaryLast frost around January 19. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings.
FebruaryFrost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini.
MarchSuccession plant lettuce and greens. Keep beds weeded and watered consistently.
AprilHarvest regularly to encourage production. Monitor for pests and disease.
MayMidsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall.
JuneDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
JulyDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
AugustDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
SeptemberDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
OctoberFirst fall frost approaching (around November 17). Transplant fall brassicas. Sow spinach, arugula, and radishes.
NovemberFirst frost around November 17. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season.
DecemberHarvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year.

What grows in a 302-day season

Frequently Asked Questions

What is the last frost date for La Verne, CA (ZIP 91750)?

The median last spring frost date for La Verne, CA (ZIP code 91750) is around January 19. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.

What is the first fall frost date in La Verne, CA?

The median first fall frost date for La Verne, CA is around November 17. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.

How long is the growing season in La Verne, CA?

The frost-free growing season in La Verne is about 302 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.

What USDA hardiness zone is La Verne, CA?

Based on frost date patterns, La Verne falls approximately in 10a. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.

When should I start tomatoes indoors in La Verne, CA?

Start tomato seeds indoors 6–8 weeks before your last frost date (around January 19). For La Verne, that's roughly November 24 to December 8. Transplant outdoors 1–2 weeks after your last frost.

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