Frost dates for 92312 — Barstow, CA
Last spring frostFeb 22median date
First fall frostNov 23median date
Growing season274 daysfrost-free
Hardiness zone9aZone 9a
How Barstow compares
- In 8 years out of 10, the last spring frost in Barstow falls between January 29 and March 24, a 54-day window. The first fall frost falls between November 9 and December 8.
- The median last frost is 37 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 9 days earlier than the zone 9a median of Mar 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9a chart.
- The weather station records an average of 32 nights a year at or below 32°F.
- Compared with Apple Valley, CA, 47 km away, the last frost here is 24 days earlier than there and the growing season is 36 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 29 |
| 50% (median) | February 22 |
| 10% (safe for tender plants) | March 24 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 9 |
| 50% (median) | November 23 |
| 90% (late) | December 8 |
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 Barstow, CA
Frost dates for 92312 — Barstow, CA — last frost Feb 22, first frost Nov 23, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Nov 30 to Dec 14Transplant outside: Jan 25 to Feb 8
Start indoors: Dec 14 to Dec 28Transplant outside: Mar 8 to Mar 22
Start indoors: Dec 14 to Dec 28Transplant outside: Mar 8 to Mar 22
Start indoors: Dec 28 to Jan 11Start indoors: Dec 28 to Jan 11Transplant outside: Mar 1 to Mar 15
Start indoors: Dec 28 to Jan 11Start indoors: Dec 28 to Jan 11Transplant outside: Feb 1 to Feb 15Sow outdoors: Jan 25 to Mar 1Plant for fall: Sep 28 to Oct 26
Start indoors: Dec 28 to Jan 11Start indoors: Dec 28 to Jan 11Transplant outside: Jan 25 to Feb 8Sow outdoors: Jan 25 to Feb 8Plant for fall: Sep 14 to Oct 5
Start indoors: Dec 28 to Jan 11Start indoors: Dec 28 to Jan 11Transplant outside: Feb 8 to Feb 22Plant for fall: Aug 17 to Sep 7
Start indoors: Dec 28 to Jan 11Start indoors: Dec 28 to Jan 11Transplant outside: Feb 1 to Feb 15Plant for fall: Aug 17 to Sep 7
Start indoors: Dec 28 to Jan 11Start indoors: Dec 28 to Jan 11Transplant outside: Feb 8 to Feb 22Plant for fall: Aug 17 to Sep 7
Start indoors: Jan 11 to Jan 25Transplant outside: Mar 15 to Mar 29Sow outdoors: Mar 15 to Mar 29
Start indoors: Jan 11 to Jan 25Transplant outside: Mar 1 to Mar 15
Sow outdoors: Jan 11 to Feb 1Plant for fall: Aug 31 to Sep 21
Sow outdoors: Jan 11 to Feb 1Plant for fall: Sep 28 to Oct 19
Sow outdoors: Jan 18 to Mar 1Plant for fall: Oct 12 to Nov 2
Start indoors: Jan 25 to Feb 1Transplant outside: Mar 8 to Mar 15Sow outdoors: Mar 1 to Mar 15Plant for fall: Sep 7 to Sep 21
Start indoors: Jan 25 to Feb 1Sow outdoors: Mar 1 to Mar 15Plant for fall: Sep 14 to Sep 28
Start indoors: Jan 25 to Feb 1Sow outdoors: Mar 1 to Mar 15
Start indoors: Jan 25 to Feb 1Transplant outside: Mar 8 to Mar 22
Sow outdoors: Feb 1 to Mar 1Plant for fall: Aug 31 to Sep 14
Sow outdoors: Feb 1 to Mar 1Plant for fall: Sep 14 to Sep 28
Sow outdoors: Feb 1 to Feb 22
Sow outdoors: Feb 8 to Mar 8Plant for fall: Sep 14 to Sep 28
Sow outdoors: Feb 8 to Mar 1Plant for fall: Sep 28 to Oct 19
Sow outdoors: Mar 1 to Mar 22Plant for fall: Sep 7 to Sep 21
Sow outdoors: Mar 1 to Mar 15
Transplant outside: Mar 8 to Mar 29
Plant for fall: Nov 9 to Dec 14
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Barstow, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 30 – Dec 14 | Jan 25 – Feb 8 | — | — |
| Peppers | Dec 14 – Dec 28 | Mar 8 – Mar 22 | — | — |
| Eggplant | Dec 14 – Dec 28 | Mar 8 – Mar 22 | — | — |
| Tomatoes | Dec 28 – Jan 11 | Mar 1 – Mar 15 | — | — |
| Lettuce | Dec 28 – Jan 11 | Feb 1 – Feb 15 | Jan 25 – Mar 1 | Sep 28 – Oct 26 |
| Kale | Dec 28 – Jan 11 | Jan 25 – Feb 8 | Jan 25 – Feb 8 | Sep 14 – Oct 5 |
| Broccoli | Dec 28 – Jan 11 | Feb 8 – Feb 22 | — | Aug 17 – Sep 7 |
| Cabbage | Dec 28 – Jan 11 | Feb 1 – Feb 15 | — | Aug 17 – Sep 7 |
| Cauliflower | Dec 28 – Jan 11 | Feb 8 – Feb 22 | — | Aug 17 – Sep 7 |
| Okra | Jan 11 – Jan 25 | Mar 15 – Mar 29 | Mar 15 – Mar 29 | — |
| Basil | Jan 11 – Jan 25 | Mar 1 – Mar 15 | — | — |
| Peas | — | — | Jan 11 – Feb 1 | Aug 31 – Sep 21 |
| Spinach | — | — | Jan 11 – Feb 1 | Sep 28 – Oct 19 |
| Radishes | — | — | Jan 18 – Mar 1 | Oct 12 – Nov 2 |
| Cucumbers | Jan 25 – Feb 1 | Mar 8 – Mar 15 | Mar 1 – Mar 15 | Sep 7 – Sep 21 |
| Zucchini & Summer Squash | Jan 25 – Feb 1 | — | Mar 1 – Mar 15 | Sep 14 – Sep 28 |
| Winter Squash & Pumpkins | Jan 25 – Feb 1 | — | Mar 1 – Mar 15 | — |
| Melons & Watermelon | Jan 25 – Feb 1 | Mar 8 – Mar 22 | — | — |
| Carrots | — | — | Feb 1 – Mar 1 | Aug 31 – Sep 14 |
| Beets | — | — | Feb 1 – Mar 1 | Sep 14 – Sep 28 |
| Potatoes | — | — | Feb 1 – Feb 22 | — |
| Swiss Chard | — | — | Feb 8 – Mar 8 | Sep 14 – Sep 28 |
| Cilantro | — | — | Feb 8 – Mar 1 | Sep 28 – Oct 19 |
| Green Beans | — | — | Mar 1 – Mar 22 | Sep 7 – Sep 21 |
| Sweet Corn | — | — | Mar 1 – Mar 15 | — |
| Sweet Potatoes | — | Mar 8 – Mar 29 | — | — |
| Garlic | — | — | — | Nov 9 – Dec 14 |
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 Barstow, CA weather station, about 1 km away (elevation 2,221 ft (677 m)).
ZIP codes in Barstow: 92311 92312
Frost dates near Barstow
- Daggett Feb 19 · Nov 26
- Hinkley Feb 22 · Nov 23
- Yermo Feb 19 · Nov 26
- Newberry Springs Feb 19 · Nov 26
- Helendale Mar 18 · Nov 11
- Oro Grande Mar 18 · Nov 11
- Apple Valley Mar 18 · Nov 11
- Fort Irwin Feb 19 · Nov 26
Frequently asked questions
When is the last frost in Barstow, CA?
The median last spring frost in Barstow, CA is February 22. There is still about a 10% chance of frost after March 24, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Barstow, CA?
The median first fall frost is November 23, with about a 10% chance of frost before November 9.
How long is the growing season in Barstow, CA?
About 274 days between the median last spring frost and first fall frost.
What planting zone is Barstow, CA?
Barstow, CA is in USDA hardiness zone 9a.