Westley, CA frost dates
Last spring frostFeb 25median date
First fall frostNov 26median date
Growing season274 daysfrost-free
Hardiness zone9bZone 9b
How Westley compares
- In 8 years out of 10, the last spring frost in Westley falls between January 24 and April 6, a 72-day window. The first fall frost falls between November 8 and December 12.
- The median last frost is 34 days earlier than the California median of Mar 31.
- Its 274-day growing season is longer than 73% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 5 days later than the zone 9b median of Feb 20. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9b chart.
- The weather station records an average of 26 nights a year at or below 32°F.
- Nearby Modesto, CA, 24 km away, gets only light, occasional frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 24 |
| 50% (median) | February 25 |
| 10% (safe for tender plants) | April 6 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 8 |
| 50% (median) | November 26 |
| 90% (late) | December 12 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Westley, CA
Westley, CA frost dates — last frost Feb 25, first frost Nov 26, zone 9b. whenisthelastfrost.com
Crop
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Start indoors: Dec 3 to Dec 17Transplant outside: Jan 28 to Feb 11
Start indoors: Dec 17 to Dec 31Transplant outside: Mar 11 to Mar 25
Start indoors: Dec 17 to Dec 31Transplant outside: Mar 11 to Mar 25
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Mar 4 to Mar 18
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 4 to Feb 18Sow outdoors: Jan 28 to Mar 4Plant for fall: Oct 1 to Oct 29
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Jan 28 to Feb 11Sow outdoors: Jan 28 to Feb 11Plant for fall: Sep 17 to Oct 8
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 11 to Feb 25Plant for fall: Aug 20 to Sep 10
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 4 to Feb 18Plant for fall: Aug 20 to Sep 10
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 11 to Feb 25Plant for fall: Aug 20 to Sep 10
Start indoors: Jan 14 to Jan 28Transplant outside: Mar 18 to Apr 1Sow outdoors: Mar 18 to Apr 1
Start indoors: Jan 14 to Jan 28Transplant outside: Mar 4 to Mar 18
Sow outdoors: Jan 14 to Feb 4Plant for fall: Sep 3 to Sep 24
Sow outdoors: Jan 14 to Feb 4Plant for fall: Oct 1 to Oct 22
Sow outdoors: Jan 21 to Mar 4Plant for fall: Oct 15 to Nov 5
Start indoors: Jan 28 to Feb 4Transplant outside: Mar 11 to Mar 18Sow outdoors: Mar 4 to Mar 18Plant for fall: Sep 10 to Sep 24
Start indoors: Jan 28 to Feb 4Sow outdoors: Mar 4 to Mar 18Plant for fall: Sep 17 to Oct 1
Start indoors: Jan 28 to Feb 4Sow outdoors: Mar 4 to Mar 18
Start indoors: Jan 28 to Feb 4Transplant outside: Mar 11 to Mar 25
Sow outdoors: Feb 4 to Mar 4Plant for fall: Sep 3 to Sep 17
Sow outdoors: Feb 4 to Mar 4Plant for fall: Sep 17 to Oct 1
Sow outdoors: Feb 4 to Feb 25
Sow outdoors: Feb 11 to Mar 11Plant for fall: Sep 17 to Oct 1
Sow outdoors: Feb 11 to Mar 4Plant for fall: Oct 1 to Oct 22
Sow outdoors: Mar 4 to Mar 25Plant for fall: Sep 10 to Sep 24
Sow outdoors: Mar 4 to Mar 18
Transplant outside: Mar 11 to Apr 1
Plant for fall: Nov 12 to Dec 17
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Westley, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 3 – Dec 17 | Jan 28 – Feb 11 | — | — |
| Peppers | Dec 17 – Dec 31 | Mar 11 – Mar 25 | — | — |
| Eggplant | Dec 17 – Dec 31 | Mar 11 – Mar 25 | — | — |
| Tomatoes | Dec 31 – Jan 14 | Mar 4 – Mar 18 | — | — |
| Lettuce | Dec 31 – Jan 14 | Feb 4 – Feb 18 | Jan 28 – Mar 4 | Oct 1 – Oct 29 |
| Kale | Dec 31 – Jan 14 | Jan 28 – Feb 11 | Jan 28 – Feb 11 | Sep 17 – Oct 8 |
| Broccoli | Dec 31 – Jan 14 | Feb 11 – Feb 25 | — | Aug 20 – Sep 10 |
| Cabbage | Dec 31 – Jan 14 | Feb 4 – Feb 18 | — | Aug 20 – Sep 10 |
| Cauliflower | Dec 31 – Jan 14 | Feb 11 – Feb 25 | — | Aug 20 – Sep 10 |
| Okra | Jan 14 – Jan 28 | Mar 18 – Apr 1 | Mar 18 – Apr 1 | — |
| Basil | Jan 14 – Jan 28 | Mar 4 – Mar 18 | — | — |
| Peas | — | — | Jan 14 – Feb 4 | Sep 3 – Sep 24 |
| Spinach | — | — | Jan 14 – Feb 4 | Oct 1 – Oct 22 |
| Radishes | — | — | Jan 21 – Mar 4 | Oct 15 – Nov 5 |
| Cucumbers | Jan 28 – Feb 4 | Mar 11 – Mar 18 | Mar 4 – Mar 18 | Sep 10 – Sep 24 |
| Zucchini & Summer Squash | Jan 28 – Feb 4 | — | Mar 4 – Mar 18 | Sep 17 – Oct 1 |
| Winter Squash & Pumpkins | Jan 28 – Feb 4 | — | Mar 4 – Mar 18 | — |
| Melons & Watermelon | Jan 28 – Feb 4 | Mar 11 – Mar 25 | — | — |
| Carrots | — | — | Feb 4 – Mar 4 | Sep 3 – Sep 17 |
| Beets | — | — | Feb 4 – Mar 4 | Sep 17 – Oct 1 |
| Potatoes | — | — | Feb 4 – Feb 25 | — |
| Swiss Chard | — | — | Feb 11 – Mar 11 | Sep 17 – Oct 1 |
| Cilantro | — | — | Feb 11 – Mar 4 | Oct 1 – Oct 22 |
| Green Beans | — | — | Mar 4 – Mar 25 | Sep 10 – Sep 24 |
| Sweet Corn | — | — | Mar 4 – Mar 18 | — |
| Sweet Potatoes | — | Mar 11 – Apr 1 | — | — |
| Garlic | — | — | — | Nov 12 – Dec 17 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Tracy Carbona, CA weather station, 19 km away (elevation 135 ft (41 m)).
Frost dates near Westley
- Vernalis Feb 25 · Nov 26
- Patterson Jan 31 · Dec 5
- Crows Landing Feb 26 · Nov 29
- Salida Jan 31 · Dec 5
- Modesto Jan 31 · Dec 5
- Ripon Feb 6 · Dec 1
- Ceres Jan 31 · Dec 5
- Keyes Jan 31 · Dec 5
- Manteca Feb 6 · Dec 1
- Tracy Feb 25 · Nov 26
Frequently asked questions
When is the last frost in Westley, CA?
The median last spring frost in Westley, CA is February 25. There is still about a 10% chance of frost after April 6, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Westley, CA?
The median first fall frost is November 26, with about a 10% chance of frost before November 8.
How long is the growing season in Westley, CA?
About 274 days between the median last spring frost and first fall frost.
What planting zone is Westley, CA?
Westley, CA is in USDA hardiness zone 9b.