Frost Dates for Provo, UT 84604

Last spring frost May 11 · First fall frost October 10 · 152 frost-free days · USDA Zone 6b

Frost probability for 84604

Frost10%50%90%
Spring (last frost)May 28May 11April 25
Fall (first frost)September 18October 10November 1

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (17.1 km away); the 50% date is the median year.

Frost dates by ZIP code in Provo, UT

ZIPLast spring frost (50%)First fall frost (50%)Zone
84604May 11October 106b
84606May 3October 167a
84601May 3October 167a
84602May 3October 16Zone 5b

Month by month in Provo

MonthWhat to do
JanuaryPlan your garden layout and order seeds. Research varieties suited to your frost dates.
FebruaryStart the slowest-growing crops indoors: onions, leeks, and celery (10–12 weeks before last frost).
MarchStart peppers and eggplant indoors 8–10 weeks before your last frost (around May 11). Start tomatoes about two weeks later, 6–8 weeks before last frost.
AprilStart herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable.
MayLast frost around May 11. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings.
JuneFrost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini.
JulySuccession plant lettuce and greens. Keep beds weeded and watered consistently.
AugustHarvest regularly to encourage production. Monitor for pests and disease.
SeptemberFirst fall frost approaching (around October 10). Transplant fall brassicas. Sow spinach, arugula, and radishes.
OctoberFirst frost around October 10. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season.
NovemberHarvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year.
DecemberClean up spent plants. Add compost to beds. Rest, review, and plan next year's garden.

What grows in a 152-day season

Frequently Asked Questions

What is the last frost date for Provo, UT (ZIP 84604)?

The median last spring frost date for Provo, UT (ZIP code 84604) is around May 11. 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 Provo, UT?

The median first fall frost date for Provo, UT is around October 10. 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 Provo, UT?

The frost-free growing season in Provo is about 152 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 Provo, UT?

Based on frost date patterns, Provo falls approximately in 6b. 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 Provo, UT?

Start tomato seeds indoors 6–8 weeks before your last frost date (around May 11). For Provo, that's roughly March 16 to March 30. Transplant outdoors 1–2 weeks after your last frost.

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