Biola, CA frost dates
Last spring frostFeb 18median date
First fall frostNov 27median date
Growing season282 daysfrost-free
Hardiness zone9aZone 9a
How Biola compares
- In 8 years out of 10, the last spring frost in Biola falls between January 16 and March 18, a 61-day window. The first fall frost falls between November 10 and December 18.
- The median last frost is 41 days earlier than the California median of Mar 31.
- Its 282-day growing season is longer than 81% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 13 days earlier 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 26 nights a year at or below 32°F.
- Biola shares its weather station with Madera, CA, 19 km away, so the two have the same frost dates.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 16 |
| 50% (median) | February 18 |
| 10% (safe for tender plants) | March 18 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 10 |
| 50% (median) | November 27 |
| 90% (late) | December 18 |
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 Biola, CA
Biola, CA frost dates — last frost Feb 18, first frost Nov 27, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Nov 26 to Dec 10Transplant outside: Jan 21 to Feb 4
Start indoors: Dec 10 to Dec 24Transplant outside: Mar 4 to Mar 18
Start indoors: Dec 10 to Dec 24Transplant outside: Mar 4 to Mar 18
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Feb 25 to Mar 11
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Jan 28 to Feb 11Sow outdoors: Jan 21 to Feb 25Plant for fall: Oct 2 to Oct 30
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Jan 21 to Feb 4Sow outdoors: Jan 21 to Feb 4Plant for fall: Sep 18 to Oct 9
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Feb 4 to Feb 18Plant for fall: Aug 21 to Sep 11
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Jan 28 to Feb 11Plant for fall: Aug 21 to Sep 11
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Feb 4 to Feb 18Plant for fall: Aug 21 to Sep 11
Start indoors: Jan 7 to Jan 21Transplant outside: Mar 11 to Mar 25Sow outdoors: Mar 11 to Mar 25
Start indoors: Jan 7 to Jan 21Transplant outside: Feb 25 to Mar 11
Sow outdoors: Jan 7 to Jan 28Plant for fall: Sep 4 to Sep 25
Sow outdoors: Jan 7 to Jan 28Plant for fall: Oct 2 to Oct 23
Sow outdoors: Jan 14 to Feb 25Plant for fall: Oct 16 to Nov 6
Start indoors: Jan 21 to Jan 28Transplant outside: Mar 4 to Mar 11Sow outdoors: Feb 25 to Mar 11Plant for fall: Sep 11 to Sep 25
Start indoors: Jan 21 to Jan 28Sow outdoors: Feb 25 to Mar 11Plant for fall: Sep 18 to Oct 2
Start indoors: Jan 21 to Jan 28Sow outdoors: Feb 25 to Mar 11
Start indoors: Jan 21 to Jan 28Transplant outside: Mar 4 to Mar 18
Sow outdoors: Jan 28 to Feb 25Plant for fall: Sep 4 to Sep 18
Sow outdoors: Jan 28 to Feb 25Plant for fall: Sep 18 to Oct 2
Sow outdoors: Jan 28 to Feb 18
Sow outdoors: Feb 4 to Mar 4Plant for fall: Sep 18 to Oct 2
Sow outdoors: Feb 4 to Feb 25Plant for fall: Oct 2 to Oct 23
Sow outdoors: Feb 25 to Mar 18Plant for fall: Sep 11 to Sep 25
Sow outdoors: Feb 25 to Mar 11
Transplant outside: Mar 4 to Mar 25
Plant for fall: Nov 13 to Dec 18
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Biola, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 26 – Dec 10 | Jan 21 – Feb 4 | — | — |
| Peppers | Dec 10 – Dec 24 | Mar 4 – Mar 18 | — | — |
| Eggplant | Dec 10 – Dec 24 | Mar 4 – Mar 18 | — | — |
| Tomatoes | Dec 24 – Jan 7 | Feb 25 – Mar 11 | — | — |
| Lettuce | Dec 24 – Jan 7 | Jan 28 – Feb 11 | Jan 21 – Feb 25 | Oct 2 – Oct 30 |
| Kale | Dec 24 – Jan 7 | Jan 21 – Feb 4 | Jan 21 – Feb 4 | Sep 18 – Oct 9 |
| Broccoli | Dec 24 – Jan 7 | Feb 4 – Feb 18 | — | Aug 21 – Sep 11 |
| Cabbage | Dec 24 – Jan 7 | Jan 28 – Feb 11 | — | Aug 21 – Sep 11 |
| Cauliflower | Dec 24 – Jan 7 | Feb 4 – Feb 18 | — | Aug 21 – Sep 11 |
| Okra | Jan 7 – Jan 21 | Mar 11 – Mar 25 | Mar 11 – Mar 25 | — |
| Basil | Jan 7 – Jan 21 | Feb 25 – Mar 11 | — | — |
| Peas | — | — | Jan 7 – Jan 28 | Sep 4 – Sep 25 |
| Spinach | — | — | Jan 7 – Jan 28 | Oct 2 – Oct 23 |
| Radishes | — | — | Jan 14 – Feb 25 | Oct 16 – Nov 6 |
| Cucumbers | Jan 21 – Jan 28 | Mar 4 – Mar 11 | Feb 25 – Mar 11 | Sep 11 – Sep 25 |
| Zucchini & Summer Squash | Jan 21 – Jan 28 | — | Feb 25 – Mar 11 | Sep 18 – Oct 2 |
| Winter Squash & Pumpkins | Jan 21 – Jan 28 | — | Feb 25 – Mar 11 | — |
| Melons & Watermelon | Jan 21 – Jan 28 | Mar 4 – Mar 18 | — | — |
| Carrots | — | — | Jan 28 – Feb 25 | Sep 4 – Sep 18 |
| Beets | — | — | Jan 28 – Feb 25 | Sep 18 – Oct 2 |
| Potatoes | — | — | Jan 28 – Feb 18 | — |
| Swiss Chard | — | — | Feb 4 – Mar 4 | Sep 18 – Oct 2 |
| Cilantro | — | — | Feb 4 – Feb 25 | Oct 2 – Oct 23 |
| Green Beans | — | — | Feb 25 – Mar 18 | Sep 11 – Sep 25 |
| Sweet Corn | — | — | Feb 25 – Mar 11 | — |
| Sweet Potatoes | — | Mar 4 – Mar 25 | — | — |
| Garlic | — | — | — | Nov 13 – Dec 18 |
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 Madera, CA weather station, 17 km away (elevation 269 ft (82 m)).
Frost dates near Biola
- Kerman Feb 18 · Nov 27
- Madera Feb 18 · Nov 27
- Raisin City Jan 30 · Dec 11
- Burrel Jan 30 · Dec 11
- San Joaquin Feb 27 · Nov 26
- Tranquillity Feb 27 · Nov 26
- Fresno Jan 30 · Dec 11
- Clovis Jan 14 · Dec 14
- Helm Feb 27 · Nov 26
- Caruthers Feb 24 · Nov 22
Frequently asked questions
When is the last frost in Biola, CA?
The median last spring frost in Biola, CA is February 18. There is still about a 10% chance of frost after March 18, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Biola, CA?
The median first fall frost is November 27, with about a 10% chance of frost before November 10.
How long is the growing season in Biola, CA?
About 282 days between the median last spring frost and first fall frost.
What planting zone is Biola, CA?
Biola, CA is in USDA hardiness zone 9a.