Wrightwood, CA frost dates
Last spring frostMay 16median date
First fall frostOct 13median date
Growing season150 daysfrost-free
Hardiness zone7bZone 7b
How Wrightwood compares
- In 8 years out of 10, the last spring frost in Wrightwood falls between April 25 and June 9, a 45-day window. The first fall frost falls between September 25 and November 1.
- The median last frost is 46 days later than the California median of Mar 31.
- Its 150-day growing season is longer than 16% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 41 days later than the zone 7b median of Apr 5. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7b chart.
- The weather station records an average of 159 nights a year at or below 32°F.
- Nearby Rancho Cucamonga, CA, 26 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) | April 25 |
| 50% (median) | May 16 |
| 10% (safe for tender plants) | June 9 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 25 |
| 50% (median) | October 13 |
| 90% (late) | November 1 |
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 Wrightwood, CA
Wrightwood, CA frost dates — last frost May 16, first frost Oct 13, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Feb 21 to Mar 7Transplant outside: Apr 18 to May 2
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 21 to Apr 4Transplant outside: May 23 to Jun 6
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Sow outdoors: Apr 18 to May 23Plant for fall: Aug 18 to Sep 15
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 18 to May 2Sow outdoors: Apr 18 to May 2Plant for fall: Aug 4 to Aug 25
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jul 7 to Jul 28
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20Sow outdoors: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 23 to Jun 6
Sow outdoors: Apr 4 to Apr 25Plant for fall: Jul 21 to Aug 11
Sow outdoors: Apr 4 to Apr 25Plant for fall: Aug 18 to Sep 8
Sow outdoors: Apr 11 to May 23Plant for fall: Sep 1 to Sep 22
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 6Sow outdoors: May 23 to Jun 6Plant for fall: Jul 28 to Aug 11
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6Plant for fall: Aug 4 to Aug 18
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 25 to May 23Plant for fall: Jul 21 to Aug 4
Sow outdoors: Apr 25 to May 23Plant for fall: Aug 4 to Aug 18
Sow outdoors: Apr 25 to May 16
Sow outdoors: May 2 to May 30Plant for fall: Aug 4 to Aug 18
Sow outdoors: May 2 to May 23Plant for fall: Aug 18 to Sep 8
Sow outdoors: May 23 to Jun 13Plant for fall: Jul 28 to Aug 11
Sow outdoors: May 23 to Jun 6
Transplant outside: May 30 to Jun 20
Plant for fall: Sep 29 to Nov 3
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Wrightwood, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 21 – Mar 7 | Apr 18 – May 2 | — | — |
| Peppers | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Eggplant | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Tomatoes | Mar 21 – Apr 4 | May 23 – Jun 6 | — | — |
| Lettuce | Mar 21 – Apr 4 | Apr 25 – May 9 | Apr 18 – May 23 | Aug 18 – Sep 15 |
| Kale | Mar 21 – Apr 4 | Apr 18 – May 2 | Apr 18 – May 2 | Aug 4 – Aug 25 |
| Broccoli | Mar 21 – Apr 4 | May 2 – May 16 | — | Jul 7 – Jul 28 |
| Cabbage | Mar 21 – Apr 4 | Apr 25 – May 9 | — | Jul 7 – Jul 28 |
| Cauliflower | Mar 21 – Apr 4 | May 2 – May 16 | — | Jul 7 – Jul 28 |
| Okra | Apr 4 – Apr 18 | Jun 6 – Jun 20 | Jun 6 – Jun 20 | — |
| Basil | Apr 4 – Apr 18 | May 23 – Jun 6 | — | — |
| Peas | — | — | Apr 4 – Apr 25 | Jul 21 – Aug 11 |
| Spinach | — | — | Apr 4 – Apr 25 | Aug 18 – Sep 8 |
| Radishes | — | — | Apr 11 – May 23 | Sep 1 – Sep 22 |
| Cucumbers | Apr 18 – Apr 25 | May 30 – Jun 6 | May 23 – Jun 6 | Jul 28 – Aug 11 |
| Zucchini & Summer Squash | Apr 18 – Apr 25 | — | May 23 – Jun 6 | Aug 4 – Aug 18 |
| Winter Squash & Pumpkins | Apr 18 – Apr 25 | — | May 23 – Jun 6 | — |
| Melons & Watermelon | Apr 18 – Apr 25 | May 30 – Jun 13 | — | — |
| Carrots | — | — | Apr 25 – May 23 | Jul 21 – Aug 4 |
| Beets | — | — | Apr 25 – May 23 | Aug 4 – Aug 18 |
| Potatoes | — | — | Apr 25 – May 16 | — |
| Swiss Chard | — | — | May 2 – May 30 | Aug 4 – Aug 18 |
| Cilantro | — | — | May 2 – May 23 | Aug 18 – Sep 8 |
| Green Beans | — | — | May 23 – Jun 13 | Jul 28 – Aug 11 |
| Sweet Corn | — | — | May 23 – Jun 6 | — |
| Sweet Potatoes | — | May 30 – Jun 20 | — | — |
| Garlic | — | — | — | Sep 29 – Nov 3 |
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 Wrightwood, CA weather station, about 1 km away (elevation 6,001 ft (1,829 m)).
Frost dates near Wrightwood
- Pinon Hills May 16 · Oct 13
- Phelan May 16 · Oct 13
- Valyermo May 16 · Oct 13
- Mount Baldy May 16 · Oct 13
- Lytle Creek May 16 · Oct 13
- Llano Mar 13 · Dec 1
- Rancho Cucamonga Jan 4 · Dec 30
- Pearblossom Mar 13 · Dec 1
- Upland Jan 4 · Dec 30
- Hesperia Feb 28 · Dec 1
Frequently asked questions
When is the last frost in Wrightwood, CA?
The median last spring frost in Wrightwood, CA is May 16. There is still about a 10% chance of frost after June 9, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Wrightwood, CA?
The median first fall frost is October 13, with about a 10% chance of frost before September 25.
How long is the growing season in Wrightwood, CA?
About 150 days between the median last spring frost and first fall frost.
What planting zone is Wrightwood, CA?
Wrightwood, CA is in USDA hardiness zone 7b.