When is the last frost in Fremont, CA?

The average last spring frost (50% probability of 32°F) in Fremont is around January 7, based on NOAA/NCEI 1991–2020 normals at the Fremont, CA station (2.7 mi away). Half of years it falls outside that date, so wait 1–2 weeks past it before setting out frost-tender plants.

When is the first fall frost in Fremont?

The average first fall frost in Fremont, CA is around December 22, giving roughly a 353-day frost-free growing season.

What planting zone is Fremont, CA?

Fremont is in USDA plant hardiness zone 9b (average annual extreme minimum temperature 25 to 30°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Fremont?

In Fremont, CA the warmest month is September (avg high 78.3°F) and the coldest is December (avg low 42.5°F). It averages about 15.9″ of precipitation a year.

Home › California › Fremont

Fremont, CA Planting Calendar & Frost Dates

USDA hardiness zone 9b · ZIP 94536 · elevation 12′ · NOAA & USDA data

Fremont is in USDA hardiness zone 9b (winters can dip to 25 to 30°F), with a growing season of about 353 days between the average last spring frost (January 7) and first fall frost (December 22). The warmest month is September (avg high 78.3°F); the coldest is December (avg low 42.5°F). It averages 15.9″ of precipitation a year. Start cool-season crops several weeks before the last frost; wait until after it for tomatoes, peppers and other tender crops.

Hardiness zone

min temp 25 to 30°F

Last spring frost

January 7

avg (50% prob, 32°F)

First fall frost

December 22

avg (50% prob, 32°F)

Growing season

353 days

frost-free window

Warmest month

September

avg high 78.3°F

Month-by-month typical weather in Fremont

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Fremont, CA (2.7 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)
January	58.6	42.6	50.6	3
February	61.4	44.4	52.9	3.2
March	65.1	46.4	55.8	2.5
April	67.7	48.3	58	1.2
May	71.1	51.9	61.5	0.5
June	75.3	54.7	65	0.2
July	77.9	56.8	67.3	0
August	78.2	57.1	67.7	0
September	78.3	56	67.2	0.1
October	73.3	52	62.6	0.7
November	64.6	46.2	55.4	1.6
December	58.4	42.5	50.5	3

What to plant when in Fremont

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: November 26 · Transplant out: January 14
Peppers	warm	Start seeds indoors: November 12 · Transplant out: January 21
Cucumbers	warm	Direct sow: January 14
Zucchini / squash	warm	Direct sow: January 14
Bush beans	warm	Direct sow: January 14
Sweet corn	warm	Direct sow: January 14
Basil	warm	Transplant out: January 14
Peas	cool	Sow (spring): December 3 · Sow (fall): October 27
Spinach	cool	Sow (spring): November 26 · Sow (fall): October 27
Lettuce	cool	Sow (spring): December 10 · Sow (fall): October 27
Kale	cool	Transplant (spring): December 17 · Sow (fall): October 13
Broccoli	cool	Transplant (spring): December 24
Carrots	cool	Sow (spring): December 17 · Sow (fall): October 13
Onions	cool	Transplant (spring): December 10
Potatoes	cool	Plant seed potatoes: December 24
Radishes	cool	Sow (spring): December 10 · Sow (fall): November 10

Dates are computed from Fremont's average frost dates using standard cool-/warm-season timing. They're a starting point — a cold spring, a warm microclimate, or a fast-maturing variety can shift them by a week or two.

Want the exact dates for your yard? →
Look up your precise ZIP-code frost dates and a full 26-crop planting calendar on our free interactive tool.
Open the frost & planting tool

🌾 Get a frost reminder

One email in early spring and early fall with the dates for your area. No spam.

Gear that helps you plant on time

Some links below are Amazon affiliate links (tag theboringthin-20). If you buy through them we may earn a small commission at no extra cost to you — it keeps this almanac free. We only list generic, genuinely-useful categories.

Soil thermometer →Know when the ground is warm enough to sow — the honest signal, not the calendar.Seed-starting trays + dome →Start tomatoes & peppers indoors on the schedule below.Seedling heat mat →Warms the soil for faster, more even germination indoors.Floating row cover / frost cloth →Buys you 4–8°F to beat an early or late frost.Raised garden bed kit →Warms and drains faster in spring than in-ground soil.Garden gloves →Basic kit for transplant day.

Nearby cities in California

Union City, CA Newark, CA Hayward, CA Pleasanton, CA Milpitas, CA Dublin, CA San Leandro, CA Sunnyvale, CA

Sources & method. Hardiness zone: 2023 USDA Plant Hardiness Zone Map (PRISM Climate Group, Oregon State University). Frost dates & growing season: NOAA/NCEI 1991–2020 U.S. Climate Normals, nearest station with published freeze normals — Fremont, CA, 2.7 mi (confidence: high). Monthly weather normals: Fremont, CA, 2.7 mi (confidence: high). ZIP centroid from U.S. Census 2023 ZCTA data. Frost dates are the 50%-probability date — half of years frost occurs outside the stated date. Nothing here is invented; where the nearest station is far, we say so. Last updated 2026-07-22.