Weimar, CA frost dates
Last spring frostApr 3median date
First fall frostNov 24median date
Growing season235 daysfrost-free
Hardiness zone9aZone 9a
How Weimar compares
- In 8 years out of 10, the last spring frost in Weimar falls between February 28 and April 29, a 60-day window. The first fall frost falls between November 2 and December 11.
- The median last frost is 3 days later than the California median of Mar 31.
- Its 235-day growing season is longer than 49% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 31 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 37 nights a year at or below 32°F.
- Compared with Rocklin, CA, 36 km away, the last frost here is 37 days later than there and the growing season is 48 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 28 |
| 50% (median) | April 3 |
| 10% (safe for tender plants) | April 29 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 2 |
| 50% (median) | November 24 |
| 90% (late) | December 11 |
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 Weimar, CA
Weimar, CA frost dates — last frost Apr 3, first frost Nov 24, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Jan 9 to Jan 23Transplant outside: Mar 6 to Mar 20
Start indoors: Jan 23 to Feb 6Transplant outside: Apr 17 to May 1
Start indoors: Jan 23 to Feb 6Transplant outside: Apr 17 to May 1
Start indoors: Feb 6 to Feb 20Transplant outside: Apr 10 to Apr 24
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 13 to Mar 27Sow outdoors: Mar 6 to Apr 10Plant for fall: Sep 29 to Oct 27
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 6 to Mar 20Sow outdoors: Mar 6 to Mar 20Plant for fall: Sep 15 to Oct 6
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 20 to Apr 3Plant for fall: Aug 18 to Sep 8
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 13 to Mar 27Plant for fall: Aug 18 to Sep 8
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 20 to Apr 3Plant for fall: Aug 18 to Sep 8
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 24 to May 8Sow outdoors: Apr 24 to May 8
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 10 to Apr 24
Sow outdoors: Feb 20 to Mar 13Plant for fall: Sep 1 to Sep 22
Sow outdoors: Feb 20 to Mar 13Plant for fall: Sep 29 to Oct 20
Sow outdoors: Feb 27 to Apr 10Plant for fall: Oct 13 to Nov 3
Start indoors: Mar 6 to Mar 13Transplant outside: Apr 17 to Apr 24Sow outdoors: Apr 10 to Apr 24Plant for fall: Sep 8 to Sep 22
Start indoors: Mar 6 to Mar 13Sow outdoors: Apr 10 to Apr 24Plant for fall: Sep 15 to Sep 29
Start indoors: Mar 6 to Mar 13Sow outdoors: Apr 10 to Apr 24
Start indoors: Mar 6 to Mar 13Transplant outside: Apr 17 to May 1
Sow outdoors: Mar 13 to Apr 10Plant for fall: Sep 1 to Sep 15
Sow outdoors: Mar 13 to Apr 10Plant for fall: Sep 15 to Sep 29
Sow outdoors: Mar 13 to Apr 3
Sow outdoors: Mar 20 to Apr 17Plant for fall: Sep 15 to Sep 29
Sow outdoors: Mar 20 to Apr 10Plant for fall: Sep 29 to Oct 20
Sow outdoors: Apr 10 to May 1Plant for fall: Sep 8 to Sep 22
Sow outdoors: Apr 10 to Apr 24
Transplant outside: Apr 17 to May 8
Plant for fall: Nov 10 to Dec 15
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Weimar, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 9 – Jan 23 | Mar 6 – Mar 20 | — | — |
| Peppers | Jan 23 – Feb 6 | Apr 17 – May 1 | — | — |
| Eggplant | Jan 23 – Feb 6 | Apr 17 – May 1 | — | — |
| Tomatoes | Feb 6 – Feb 20 | Apr 10 – Apr 24 | — | — |
| Lettuce | Feb 6 – Feb 20 | Mar 13 – Mar 27 | Mar 6 – Apr 10 | Sep 29 – Oct 27 |
| Kale | Feb 6 – Feb 20 | Mar 6 – Mar 20 | Mar 6 – Mar 20 | Sep 15 – Oct 6 |
| Broccoli | Feb 6 – Feb 20 | Mar 20 – Apr 3 | — | Aug 18 – Sep 8 |
| Cabbage | Feb 6 – Feb 20 | Mar 13 – Mar 27 | — | Aug 18 – Sep 8 |
| Cauliflower | Feb 6 – Feb 20 | Mar 20 – Apr 3 | — | Aug 18 – Sep 8 |
| Okra | Feb 20 – Mar 6 | Apr 24 – May 8 | Apr 24 – May 8 | — |
| Basil | Feb 20 – Mar 6 | Apr 10 – Apr 24 | — | — |
| Peas | — | — | Feb 20 – Mar 13 | Sep 1 – Sep 22 |
| Spinach | — | — | Feb 20 – Mar 13 | Sep 29 – Oct 20 |
| Radishes | — | — | Feb 27 – Apr 10 | Oct 13 – Nov 3 |
| Cucumbers | Mar 6 – Mar 13 | Apr 17 – Apr 24 | Apr 10 – Apr 24 | Sep 8 – Sep 22 |
| Zucchini & Summer Squash | Mar 6 – Mar 13 | — | Apr 10 – Apr 24 | Sep 15 – Sep 29 |
| Winter Squash & Pumpkins | Mar 6 – Mar 13 | — | Apr 10 – Apr 24 | — |
| Melons & Watermelon | Mar 6 – Mar 13 | Apr 17 – May 1 | — | — |
| Carrots | — | — | Mar 13 – Apr 10 | Sep 1 – Sep 15 |
| Beets | — | — | Mar 13 – Apr 10 | Sep 15 – Sep 29 |
| Potatoes | — | — | Mar 13 – Apr 3 | — |
| Swiss Chard | — | — | Mar 20 – Apr 17 | Sep 15 – Sep 29 |
| Cilantro | — | — | Mar 20 – Apr 10 | Sep 29 – Oct 20 |
| Green Beans | — | — | Apr 10 – May 1 | Sep 8 – Sep 22 |
| Sweet Corn | — | — | Apr 10 – Apr 24 | — |
| Sweet Potatoes | — | Apr 17 – May 8 | — | — |
| Garlic | — | — | — | Nov 10 – Dec 15 |
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 Colfax, CA weather station, 6 km away (elevation 2,379 ft (725 m)).
Frost dates near Weimar
- Applegate Apr 3 · Nov 24
- Colfax Apr 3 · Nov 24
- Meadow Vista Feb 25 · Dec 5
- Chicago Park Apr 3 · Nov 24
- Auburn Feb 25 · Dec 5
- Greenwood Apr 12 · Nov 21
- Grass Valley Apr 10 · Nov 13
- Cool Feb 25 · Dec 5
- Gold Run Apr 3 · Nov 24
- Cedar Ridge Apr 10 · Nov 13
Frequently asked questions
When is the last frost in Weimar, CA?
The median last spring frost in Weimar, CA is April 3. There is still about a 10% chance of frost after April 29, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Weimar, CA?
The median first fall frost is November 24, with about a 10% chance of frost before November 2.
How long is the growing season in Weimar, CA?
About 235 days between the median last spring frost and first fall frost.
What planting zone is Weimar, CA?
Weimar, CA is in USDA hardiness zone 9a.