Rimforest, CA frost dates
Last spring frostMay 5median date
First fall frostNov 2median date
Growing season181 daysfrost-free
Hardiness zone8aZone 8a
How Rimforest compares
- In 8 years out of 10, the last spring frost in Rimforest falls between April 9 and May 31, a 52-day window. The first fall frost falls between October 12 and November 15.
- The median last frost is 35 days later than the California median of Mar 31.
- Its 181-day growing season is longer than 25% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 37 days later than the zone 8a median of Mar 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8a chart.
- The weather station records an average of 105 nights a year at or below 32°F.
- Nearby Highland, CA, 11 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 9 |
| 50% (median) | May 5 |
| 10% (safe for tender plants) | May 31 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 12 |
| 50% (median) | November 2 |
| 90% (late) | November 15 |
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 Rimforest, CA
Rimforest, CA frost dates — last frost May 5, first frost Nov 2, zone 8a. whenisthelastfrost.com
Crop
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Start indoors: Feb 10 to Feb 24Transplant outside: Apr 7 to Apr 21
Start indoors: Feb 24 to Mar 10Transplant outside: May 19 to Jun 2
Start indoors: Feb 24 to Mar 10Transplant outside: May 19 to Jun 2
Start indoors: Mar 10 to Mar 24Transplant outside: May 12 to May 26
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 14 to Apr 28Sow outdoors: Apr 7 to May 12Plant for fall: Sep 7 to Oct 5
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 7 to Apr 21Sow outdoors: Apr 7 to Apr 21Plant for fall: Aug 24 to Sep 14
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 21 to May 5Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 14 to Apr 28Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 21 to May 5Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 24 to Apr 7Transplant outside: May 26 to Jun 9Sow outdoors: May 26 to Jun 9
Start indoors: Mar 24 to Apr 7Transplant outside: May 12 to May 26
Sow outdoors: Mar 24 to Apr 14Plant for fall: Aug 10 to Aug 31
Sow outdoors: Mar 24 to Apr 14Plant for fall: Sep 7 to Sep 28
Sow outdoors: Mar 31 to May 12Plant for fall: Sep 21 to Oct 12
Start indoors: Apr 7 to Apr 14Transplant outside: May 19 to May 26Sow outdoors: May 12 to May 26Plant for fall: Aug 17 to Aug 31
Start indoors: Apr 7 to Apr 14Sow outdoors: May 12 to May 26Plant for fall: Aug 24 to Sep 7
Start indoors: Apr 7 to Apr 14Sow outdoors: May 12 to May 26
Start indoors: Apr 7 to Apr 14Transplant outside: May 19 to Jun 2
Sow outdoors: Apr 14 to May 12Plant for fall: Aug 10 to Aug 24
Sow outdoors: Apr 14 to May 12Plant for fall: Aug 24 to Sep 7
Sow outdoors: Apr 14 to May 5
Sow outdoors: Apr 21 to May 19Plant for fall: Aug 24 to Sep 7
Sow outdoors: Apr 21 to May 12Plant for fall: Sep 7 to Sep 28
Sow outdoors: May 12 to Jun 2Plant for fall: Aug 17 to Aug 31
Sow outdoors: May 12 to May 26
Transplant outside: May 19 to Jun 9
Plant for fall: Oct 19 to Nov 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Rimforest, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 10 – Feb 24 | Apr 7 – Apr 21 | — | — |
| Peppers | Feb 24 – Mar 10 | May 19 – Jun 2 | — | — |
| Eggplant | Feb 24 – Mar 10 | May 19 – Jun 2 | — | — |
| Tomatoes | Mar 10 – Mar 24 | May 12 – May 26 | — | — |
| Lettuce | Mar 10 – Mar 24 | Apr 14 – Apr 28 | Apr 7 – May 12 | Sep 7 – Oct 5 |
| Kale | Mar 10 – Mar 24 | Apr 7 – Apr 21 | Apr 7 – Apr 21 | Aug 24 – Sep 14 |
| Broccoli | Mar 10 – Mar 24 | Apr 21 – May 5 | — | Jul 27 – Aug 17 |
| Cabbage | Mar 10 – Mar 24 | Apr 14 – Apr 28 | — | Jul 27 – Aug 17 |
| Cauliflower | Mar 10 – Mar 24 | Apr 21 – May 5 | — | Jul 27 – Aug 17 |
| Okra | Mar 24 – Apr 7 | May 26 – Jun 9 | May 26 – Jun 9 | — |
| Basil | Mar 24 – Apr 7 | May 12 – May 26 | — | — |
| Peas | — | — | Mar 24 – Apr 14 | Aug 10 – Aug 31 |
| Spinach | — | — | Mar 24 – Apr 14 | Sep 7 – Sep 28 |
| Radishes | — | — | Mar 31 – May 12 | Sep 21 – Oct 12 |
| Cucumbers | Apr 7 – Apr 14 | May 19 – May 26 | May 12 – May 26 | Aug 17 – Aug 31 |
| Zucchini & Summer Squash | Apr 7 – Apr 14 | — | May 12 – May 26 | Aug 24 – Sep 7 |
| Winter Squash & Pumpkins | Apr 7 – Apr 14 | — | May 12 – May 26 | — |
| Melons & Watermelon | Apr 7 – Apr 14 | May 19 – Jun 2 | — | — |
| Carrots | — | — | Apr 14 – May 12 | Aug 10 – Aug 24 |
| Beets | — | — | Apr 14 – May 12 | Aug 24 – Sep 7 |
| Potatoes | — | — | Apr 14 – May 5 | — |
| Swiss Chard | — | — | Apr 21 – May 19 | Aug 24 – Sep 7 |
| Cilantro | — | — | Apr 21 – May 12 | Sep 7 – Sep 28 |
| Green Beans | — | — | May 12 – Jun 2 | Aug 17 – Aug 31 |
| Sweet Corn | — | — | May 12 – May 26 | — |
| Sweet Potatoes | — | May 19 – Jun 9 | — | — |
| Garlic | — | — | — | Oct 19 – Nov 23 |
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 Lake Arrowhead, CA weather station, 4 km away (elevation 5,207 ft (1,587 m)).
Frost dates near Rimforest
- Twin Peaks May 5 · Nov 2
- Lake Arrowhead May 5 · Nov 2
- Skyforest May 5 · Nov 2
- Crestline May 5 · Nov 2
- Cedar Glen May 5 · Nov 2
- Cedarpines Park May 5 · Nov 2
- Patton Jan 27 · Dec 19
- Running Springs May 5 · Nov 2
- Highland Jan 27 · Dec 19
- Blue Jay May 5 · Nov 2
Frequently asked questions
When is the last frost in Rimforest, CA?
The median last spring frost in Rimforest, CA is May 5. There is still about a 10% chance of frost after May 31, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Rimforest, CA?
The median first fall frost is November 2, with about a 10% chance of frost before October 12.
How long is the growing season in Rimforest, CA?
About 181 days between the median last spring frost and first fall frost.
What planting zone is Rimforest, CA?
Rimforest, CA is in USDA hardiness zone 8a.