Mountain Pass, CA frost dates
Last spring frostMar 17median date
First fall frostNov 20median date
Growing season248 daysfrost-free
Hardiness zone8bZone 8b
How Mountain Pass compares
- In 8 years out of 10, the last spring frost in Mountain Pass falls between February 23 and April 11, a 47-day window. The first fall frost falls between November 4 and December 5.
- The median last frost is 14 days earlier than the California median of Mar 31.
- Its 248-day growing season is longer than 55% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is typical for zone 8b, where the median is Mar 16.
- The weather station records an average of 56 nights a year at or below 32°F.
- Nearby Henderson, NV, 75 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) | February 23 |
| 50% (median) | March 17 |
| 10% (safe for tender plants) | April 11 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 4 |
| 50% (median) | November 20 |
| 90% (late) | December 5 |
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 Mountain Pass, CA
Mountain Pass, CA frost dates — last frost Mar 17, first frost Nov 20, zone 8b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 23 to Jan 6Start indoors: Dec 23 to Jan 6Transplant outside: Feb 17 to Mar 3
Start indoors: Jan 6 to Jan 20Transplant outside: Mar 31 to Apr 14
Start indoors: Jan 6 to Jan 20Transplant outside: Mar 31 to Apr 14
Start indoors: Jan 20 to Feb 3Transplant outside: Mar 24 to Apr 7
Start indoors: Jan 20 to Feb 3Transplant outside: Feb 24 to Mar 10Sow outdoors: Feb 17 to Mar 24Plant for fall: Sep 25 to Oct 23
Start indoors: Jan 20 to Feb 3Transplant outside: Feb 17 to Mar 3Sow outdoors: Feb 17 to Mar 3Plant for fall: Sep 11 to Oct 2
Start indoors: Jan 20 to Feb 3Transplant outside: Mar 3 to Mar 17Plant for fall: Aug 14 to Sep 4
Start indoors: Jan 20 to Feb 3Transplant outside: Feb 24 to Mar 10Plant for fall: Aug 14 to Sep 4
Start indoors: Jan 20 to Feb 3Transplant outside: Mar 3 to Mar 17Plant for fall: Aug 14 to Sep 4
Start indoors: Feb 3 to Feb 17Transplant outside: Apr 7 to Apr 21Sow outdoors: Apr 7 to Apr 21
Start indoors: Feb 3 to Feb 17Transplant outside: Mar 24 to Apr 7
Sow outdoors: Feb 3 to Feb 24Plant for fall: Aug 28 to Sep 18
Sow outdoors: Feb 3 to Feb 24Plant for fall: Sep 25 to Oct 16
Sow outdoors: Feb 10 to Mar 24Plant for fall: Oct 9 to Oct 30
Start indoors: Feb 17 to Feb 24Transplant outside: Mar 31 to Apr 7Sow outdoors: Mar 24 to Apr 7Plant for fall: Sep 4 to Sep 18
Start indoors: Feb 17 to Feb 24Sow outdoors: Mar 24 to Apr 7Plant for fall: Sep 11 to Sep 25
Start indoors: Feb 17 to Feb 24Sow outdoors: Mar 24 to Apr 7
Start indoors: Feb 17 to Feb 24Transplant outside: Mar 31 to Apr 14
Sow outdoors: Feb 24 to Mar 24Plant for fall: Aug 28 to Sep 11
Sow outdoors: Feb 24 to Mar 24Plant for fall: Sep 11 to Sep 25
Sow outdoors: Feb 24 to Mar 17
Sow outdoors: Mar 3 to Mar 31Plant for fall: Sep 11 to Sep 25
Sow outdoors: Mar 3 to Mar 24Plant for fall: Sep 25 to Oct 16
Sow outdoors: Mar 24 to Apr 14Plant for fall: Sep 4 to Sep 18
Sow outdoors: Mar 24 to Apr 7
Transplant outside: Mar 31 to Apr 21
Plant for fall: Nov 6 to Dec 11
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Mountain Pass, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 23 – Jan 6 | Feb 17 – Mar 3 | — | — |
| Peppers | Jan 6 – Jan 20 | Mar 31 – Apr 14 | — | — |
| Eggplant | Jan 6 – Jan 20 | Mar 31 – Apr 14 | — | — |
| Tomatoes | Jan 20 – Feb 3 | Mar 24 – Apr 7 | — | — |
| Lettuce | Jan 20 – Feb 3 | Feb 24 – Mar 10 | Feb 17 – Mar 24 | Sep 25 – Oct 23 |
| Kale | Jan 20 – Feb 3 | Feb 17 – Mar 3 | Feb 17 – Mar 3 | Sep 11 – Oct 2 |
| Broccoli | Jan 20 – Feb 3 | Mar 3 – Mar 17 | — | Aug 14 – Sep 4 |
| Cabbage | Jan 20 – Feb 3 | Feb 24 – Mar 10 | — | Aug 14 – Sep 4 |
| Cauliflower | Jan 20 – Feb 3 | Mar 3 – Mar 17 | — | Aug 14 – Sep 4 |
| Okra | Feb 3 – Feb 17 | Apr 7 – Apr 21 | Apr 7 – Apr 21 | — |
| Basil | Feb 3 – Feb 17 | Mar 24 – Apr 7 | — | — |
| Peas | — | — | Feb 3 – Feb 24 | Aug 28 – Sep 18 |
| Spinach | — | — | Feb 3 – Feb 24 | Sep 25 – Oct 16 |
| Radishes | — | — | Feb 10 – Mar 24 | Oct 9 – Oct 30 |
| Cucumbers | Feb 17 – Feb 24 | Mar 31 – Apr 7 | Mar 24 – Apr 7 | Sep 4 – Sep 18 |
| Zucchini & Summer Squash | Feb 17 – Feb 24 | — | Mar 24 – Apr 7 | Sep 11 – Sep 25 |
| Winter Squash & Pumpkins | Feb 17 – Feb 24 | — | Mar 24 – Apr 7 | — |
| Melons & Watermelon | Feb 17 – Feb 24 | Mar 31 – Apr 14 | — | — |
| Carrots | — | — | Feb 24 – Mar 24 | Aug 28 – Sep 11 |
| Beets | — | — | Feb 24 – Mar 24 | Sep 11 – Sep 25 |
| Potatoes | — | — | Feb 24 – Mar 17 | — |
| Swiss Chard | — | — | Mar 3 – Mar 31 | Sep 11 – Sep 25 |
| Cilantro | — | — | Mar 3 – Mar 24 | Sep 25 – Oct 16 |
| Green Beans | — | — | Mar 24 – Apr 14 | Sep 4 – Sep 18 |
| Sweet Corn | — | — | Mar 24 – Apr 7 | — |
| Sweet Potatoes | — | Mar 31 – Apr 21 | — | — |
| Garlic | — | — | — | Nov 6 – Dec 11 |
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 Goodsprings, NV weather station, 42 km away (elevation 3,717 ft (1,133 m)). That is far enough away that your dates may differ, especially if your elevation is different.
Frost dates near Mountain Pass
- Nipton Mar 7 · Nov 29
- Cima Mar 6 · Dec 8
- Baker Feb 14 · Nov 27
- Tecopa Mar 29 · Nov 3
- Shoshone Mar 29 · Nov 3
- Essex Mar 6 · Dec 8
- Ludlow Mar 1 · Nov 29
- Amboy Mar 6 · Dec 8
- Fort Irwin Feb 19 · Nov 26
- Needles Jan 6 · Jan 2
Frequently asked questions
When is the last frost in Mountain Pass, CA?
The median last spring frost in Mountain Pass, CA is March 17. There is still about a 10% chance of frost after April 11, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Mountain Pass, CA?
The median first fall frost is November 20, with about a 10% chance of frost before November 4.
How long is the growing season in Mountain Pass, CA?
About 248 days between the median last spring frost and first fall frost.
What planting zone is Mountain Pass, CA?
Mountain Pass, CA is in USDA hardiness zone 8b.