Jenner, CA frost dates
Frost is light and occasional here — typically a few cold nights around midwinter (about 12 a year). Cover tender plants when frost is forecast.
How Jenner compares
- In a typical year, frost nights in Jenner fall between December 27 and February 26. In 1 year in 10 the first frost comes as early as December 1, or the last frost as late as May 1.
- Nearby Santa Rosa, CA, 43 km away, has a regular frost season (last frost Feb 25), a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 27 |
| 50% (median) | February 26 |
| 10% (safe for tender plants) | May 1 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | December 1 |
| 50% (median) | December 27 |
| 90% (late) | February 27 |
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 Jenner, CA
Jenner, CA frost dates — last frost Feb 26, first frost Dec 27, zone 10a. whenisthelastfrost.com
In mild climates, summer heat limits many crops as much as frost does. Use this calendar for spring planting and lean on fall and winter for cool-season crops.
When to plant vegetables in Jenner, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 4 – Dec 18 | Jan 29 – Feb 12 | — | — |
| Peppers | Dec 18 – Jan 1 | Mar 12 – Mar 26 | — | — |
| Eggplant | Dec 18 – Jan 1 | Mar 12 – Mar 26 | — | — |
| Tomatoes | Jan 1 – Jan 15 | Mar 5 – Mar 19 | — | — |
| Lettuce | Jan 1 – Jan 15 | Feb 5 – Feb 19 | Jan 29 – Mar 5 | Nov 1 – Nov 29 |
| Kale | Jan 1 – Jan 15 | Jan 29 – Feb 12 | Jan 29 – Feb 12 | Oct 18 – Nov 8 |
| Broccoli | Jan 1 – Jan 15 | Feb 12 – Feb 26 | — | Sep 20 – Oct 11 |
| Cabbage | Jan 1 – Jan 15 | Feb 5 – Feb 19 | — | Sep 20 – Oct 11 |
| Cauliflower | Jan 1 – Jan 15 | Feb 12 – Feb 26 | — | Sep 20 – Oct 11 |
| Okra | Jan 15 – Jan 29 | Mar 19 – Apr 2 | Mar 19 – Apr 2 | — |
| Basil | Jan 15 – Jan 29 | Mar 5 – Mar 19 | — | — |
| Peas | — | — | Jan 15 – Feb 5 | Oct 4 – Oct 25 |
| Spinach | — | — | Jan 15 – Feb 5 | Nov 1 – Nov 22 |
| Radishes | — | — | Jan 22 – Mar 5 | Nov 15 – Dec 6 |
| Cucumbers | Jan 29 – Feb 5 | Mar 12 – Mar 19 | Mar 5 – Mar 19 | Oct 11 – Oct 25 |
| Zucchini & Summer Squash | Jan 29 – Feb 5 | — | Mar 5 – Mar 19 | Oct 18 – Nov 1 |
| Winter Squash & Pumpkins | Jan 29 – Feb 5 | — | Mar 5 – Mar 19 | — |
| Melons & Watermelon | Jan 29 – Feb 5 | Mar 12 – Mar 26 | — | — |
| Carrots | — | — | Feb 5 – Mar 5 | Oct 4 – Oct 18 |
| Beets | — | — | Feb 5 – Mar 5 | Oct 18 – Nov 1 |
| Potatoes | — | — | Feb 5 – Feb 26 | — |
| Swiss Chard | — | — | Feb 12 – Mar 12 | Oct 18 – Nov 1 |
| Cilantro | — | — | Feb 12 – Mar 5 | Nov 1 – Nov 22 |
| Green Beans | — | — | Mar 5 – Mar 26 | Oct 11 – Oct 25 |
| Sweet Corn | — | — | Mar 5 – Mar 19 | — |
| Sweet Potatoes | — | Mar 12 – Apr 2 | — | — |
| Garlic | — | — | — | Dec 13 – Jan 17 |
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 Ft Ross, CA weather station, 5 km away (elevation 112 ft (34 m)).
Frost dates near Jenner
- Cazadero Feb 26 · Dec 27
- Duncans Mills Jan 29 · Dec 30
- Villa Grande Jan 29 · Dec 30
- Monte Rio Jan 29 · Dec 30
- Guerneville Jan 29 · Dec 30
- Rio Nido Mar 20 · Nov 13
- Occidental Jan 29 · Dec 30
- Camp Meeker Jan 29 · Dec 30
- Bodega Bay Jan 1 · Dec 31
- Bodega Jan 29 · Dec 30
Frequently asked questions
When is the last frost in Jenner, CA?
The median last spring frost in Jenner, CA is February 26. There is still about a 10% chance of frost after May 1, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Jenner, CA?
The median first fall frost is December 27, with about a 10% chance of frost before December 1.
How long is the growing season in Jenner, CA?
About 304 days between the median last spring frost and first fall frost.
What planting zone is Jenner, CA?
Jenner, CA is in USDA hardiness zone 10a.