Somerset, CA frost dates
Last spring frostApr 26median date
First fall frostNov 2median date
Growing season190 daysfrost-free
Hardiness zone9aZone 9a
How Somerset compares
- In 8 years out of 10, the last spring frost in Somerset falls between April 10 and May 19, a 39-day window. The first fall frost falls between October 14 and November 20.
- The median last frost is 26 days later than the California median of Mar 31.
- Its 190-day growing season is longer than 29% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 54 days later 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 97 nights a year at or below 32°F.
- Nearby Folsom, CA, 50 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 10 |
| 50% (median) | April 26 |
| 10% (safe for tender plants) | May 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 14 |
| 50% (median) | November 2 |
| 90% (late) | November 20 |
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 Somerset, CA
Somerset, CA frost dates — last frost Apr 26, first frost Nov 2, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Feb 1 to Feb 15Transplant outside: Mar 29 to Apr 12
Start indoors: Feb 15 to Mar 1Transplant outside: May 10 to May 24
Start indoors: Feb 15 to Mar 1Transplant outside: May 10 to May 24
Start indoors: Mar 1 to Mar 15Transplant outside: May 3 to May 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 5 to Apr 19Sow outdoors: Mar 29 to May 3Plant for fall: Sep 7 to Oct 5
Start indoors: Mar 1 to Mar 15Transplant outside: Mar 29 to Apr 12Sow outdoors: Mar 29 to Apr 12Plant for fall: Aug 24 to Sep 14
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 5 to Apr 19Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 15 to Mar 29Transplant outside: May 17 to May 31Sow outdoors: May 17 to May 31
Start indoors: Mar 15 to Mar 29Transplant outside: May 3 to May 17
Sow outdoors: Mar 15 to Apr 5Plant for fall: Aug 10 to Aug 31
Sow outdoors: Mar 15 to Apr 5Plant for fall: Sep 7 to Sep 28
Sow outdoors: Mar 22 to May 3Plant for fall: Sep 21 to Oct 12
Start indoors: Mar 29 to Apr 5Transplant outside: May 10 to May 17Sow outdoors: May 3 to May 17Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 29 to Apr 5Sow outdoors: May 3 to May 17Plant for fall: Aug 24 to Sep 7
Start indoors: Mar 29 to Apr 5Sow outdoors: May 3 to May 17
Start indoors: Mar 29 to Apr 5Transplant outside: May 10 to May 24
Sow outdoors: Apr 5 to May 3Plant for fall: Aug 10 to Aug 24
Sow outdoors: Apr 5 to May 3Plant for fall: Aug 24 to Sep 7
Sow outdoors: Apr 5 to Apr 26
Sow outdoors: Apr 12 to May 10Plant for fall: Aug 24 to Sep 7
Sow outdoors: Apr 12 to May 3Plant for fall: Sep 7 to Sep 28
Sow outdoors: May 3 to May 24Plant for fall: Aug 17 to Aug 31
Sow outdoors: May 3 to May 17
Transplant outside: May 10 to May 31
Plant for fall: Oct 19 to Nov 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Somerset, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 1 – Feb 15 | Mar 29 – Apr 12 | — | — |
| Peppers | Feb 15 – Mar 1 | May 10 – May 24 | — | — |
| Eggplant | Feb 15 – Mar 1 | May 10 – May 24 | — | — |
| Tomatoes | Mar 1 – Mar 15 | May 3 – May 17 | — | — |
| Lettuce | Mar 1 – Mar 15 | Apr 5 – Apr 19 | Mar 29 – May 3 | Sep 7 – Oct 5 |
| Kale | Mar 1 – Mar 15 | Mar 29 – Apr 12 | Mar 29 – Apr 12 | Aug 24 – Sep 14 |
| Broccoli | Mar 1 – Mar 15 | Apr 12 – Apr 26 | — | Jul 27 – Aug 17 |
| Cabbage | Mar 1 – Mar 15 | Apr 5 – Apr 19 | — | Jul 27 – Aug 17 |
| Cauliflower | Mar 1 – Mar 15 | Apr 12 – Apr 26 | — | Jul 27 – Aug 17 |
| Okra | Mar 15 – Mar 29 | May 17 – May 31 | May 17 – May 31 | — |
| Basil | Mar 15 – Mar 29 | May 3 – May 17 | — | — |
| Peas | — | — | Mar 15 – Apr 5 | Aug 10 – Aug 31 |
| Spinach | — | — | Mar 15 – Apr 5 | Sep 7 – Sep 28 |
| Radishes | — | — | Mar 22 – May 3 | Sep 21 – Oct 12 |
| Cucumbers | Mar 29 – Apr 5 | May 10 – May 17 | May 3 – May 17 | Aug 17 – Aug 31 |
| Zucchini & Summer Squash | Mar 29 – Apr 5 | — | May 3 – May 17 | Aug 24 – Sep 7 |
| Winter Squash & Pumpkins | Mar 29 – Apr 5 | — | May 3 – May 17 | — |
| Melons & Watermelon | Mar 29 – Apr 5 | May 10 – May 24 | — | — |
| Carrots | — | — | Apr 5 – May 3 | Aug 10 – Aug 24 |
| Beets | — | — | Apr 5 – May 3 | Aug 24 – Sep 7 |
| Potatoes | — | — | Apr 5 – Apr 26 | — |
| Swiss Chard | — | — | Apr 12 – May 10 | Aug 24 – Sep 7 |
| Cilantro | — | — | Apr 12 – May 3 | Sep 7 – Sep 28 |
| Green Beans | — | — | May 3 – May 24 | Aug 17 – Aug 31 |
| Sweet Corn | — | — | May 3 – May 17 | — |
| Sweet Potatoes | — | May 10 – May 31 | — | — |
| 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 Pacific House, CA weather station, 20 km away (elevation 3,451 ft (1,052 m)).
Frost dates near Somerset
- Grizzly Flats Apr 26 · Nov 2
- Fiddletown Mar 4 · Dec 11
- Mount Aukum Mar 31 · Nov 21
- Volcano Mar 4 · Dec 11
- River Pines Mar 31 · Nov 21
- Pioneer Mar 4 · Dec 11
- Camino Mar 31 · Nov 21
- Pollock Pines Apr 26 · Nov 2
- Diamond Springs Mar 31 · Nov 21
- Pine Grove Mar 4 · Dec 11
Frequently asked questions
When is the last frost in Somerset, CA?
The median last spring frost in Somerset, CA is April 26. There is still about a 10% chance of frost after May 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Somerset, CA?
The median first fall frost is November 2, with about a 10% chance of frost before October 14.
How long is the growing season in Somerset, CA?
About 190 days between the median last spring frost and first fall frost.
What planting zone is Somerset, CA?
Somerset, CA is in USDA hardiness zone 9a.