Sonora, TX frost dates
Last spring frostApr 1median date
First fall frostNov 6median date
Growing season219 daysfrost-free
Hardiness zone8aZone 8a
How Sonora compares
- In 8 years out of 10, the last spring frost in Sonora falls between March 8 and April 20, a 43-day window. The first fall frost falls between October 24 and November 24.
- The median last frost is 17 days later than the Texas median of Mar 15.
- Its 219-day growing season is longer than 15% of the 1,316 Texas places with a regular frost season (state median 245 days).
- The last frost is typical for zone 8a, where the median is Mar 29.
- The weather station records an average of 70 nights a year at or below 32°F.
- Compared with San Angelo, TX, 102 km away, the last frost here is 12 days later than there and the growing season is 16 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 8 |
| 50% (median) | April 1 |
| 10% (safe for tender plants) | April 20 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 24 |
| 50% (median) | November 6 |
| 90% (late) | November 24 |
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 Sonora, TX
Sonora, TX frost dates — last frost Apr 1, first frost Nov 6, zone 8a. whenisthelastfrost.com
Crop
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Start indoors: Jan 7 to Jan 21Transplant outside: Mar 4 to Mar 18
Start indoors: Jan 21 to Feb 4Transplant outside: Apr 15 to Apr 29
Start indoors: Jan 21 to Feb 4Transplant outside: Apr 15 to Apr 29
Start indoors: Feb 4 to Feb 18Transplant outside: Apr 8 to Apr 22
Start indoors: Feb 4 to Feb 18Transplant outside: Mar 11 to Mar 25Sow outdoors: Mar 4 to Apr 8Plant for fall: Sep 11 to Oct 9
Start indoors: Feb 4 to Feb 18Transplant outside: Mar 4 to Mar 18Sow outdoors: Mar 4 to Mar 18Plant for fall: Aug 28 to Sep 18
Start indoors: Feb 4 to Feb 18Transplant outside: Mar 18 to Apr 1Plant for fall: Jul 31 to Aug 21
Start indoors: Feb 4 to Feb 18Transplant outside: Mar 11 to Mar 25Plant for fall: Jul 31 to Aug 21
Start indoors: Feb 4 to Feb 18Transplant outside: Mar 18 to Apr 1Plant for fall: Jul 31 to Aug 21
Start indoors: Feb 18 to Mar 4Transplant outside: Apr 22 to May 6Sow outdoors: Apr 22 to May 6
Start indoors: Feb 18 to Mar 4Transplant outside: Apr 8 to Apr 22
Sow outdoors: Feb 18 to Mar 11Plant for fall: Aug 14 to Sep 4
Sow outdoors: Feb 18 to Mar 11Plant for fall: Sep 11 to Oct 2
Sow outdoors: Feb 25 to Apr 8Plant for fall: Sep 25 to Oct 16
Start indoors: Mar 4 to Mar 11Transplant outside: Apr 15 to Apr 22Sow outdoors: Apr 8 to Apr 22Plant for fall: Aug 21 to Sep 4
Start indoors: Mar 4 to Mar 11Sow outdoors: Apr 8 to Apr 22Plant for fall: Aug 28 to Sep 11
Start indoors: Mar 4 to Mar 11Sow outdoors: Apr 8 to Apr 22
Start indoors: Mar 4 to Mar 11Transplant outside: Apr 15 to Apr 29
Sow outdoors: Mar 11 to Apr 8Plant for fall: Aug 14 to Aug 28
Sow outdoors: Mar 11 to Apr 8Plant for fall: Aug 28 to Sep 11
Sow outdoors: Mar 11 to Apr 1
Sow outdoors: Mar 18 to Apr 15Plant for fall: Aug 28 to Sep 11
Sow outdoors: Mar 18 to Apr 8Plant for fall: Sep 11 to Oct 2
Sow outdoors: Apr 8 to Apr 29Plant for fall: Aug 21 to Sep 4
Sow outdoors: Apr 8 to Apr 22
Transplant outside: Apr 15 to May 6
Plant for fall: Oct 23 to Nov 27
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Sonora, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 7 – Jan 21 | Mar 4 – Mar 18 | — | — |
| Peppers | Jan 21 – Feb 4 | Apr 15 – Apr 29 | — | — |
| Eggplant | Jan 21 – Feb 4 | Apr 15 – Apr 29 | — | — |
| Tomatoes | Feb 4 – Feb 18 | Apr 8 – Apr 22 | — | — |
| Lettuce | Feb 4 – Feb 18 | Mar 11 – Mar 25 | Mar 4 – Apr 8 | Sep 11 – Oct 9 |
| Kale | Feb 4 – Feb 18 | Mar 4 – Mar 18 | Mar 4 – Mar 18 | Aug 28 – Sep 18 |
| Broccoli | Feb 4 – Feb 18 | Mar 18 – Apr 1 | — | Jul 31 – Aug 21 |
| Cabbage | Feb 4 – Feb 18 | Mar 11 – Mar 25 | — | Jul 31 – Aug 21 |
| Cauliflower | Feb 4 – Feb 18 | Mar 18 – Apr 1 | — | Jul 31 – Aug 21 |
| Okra | Feb 18 – Mar 4 | Apr 22 – May 6 | Apr 22 – May 6 | — |
| Basil | Feb 18 – Mar 4 | Apr 8 – Apr 22 | — | — |
| Peas | — | — | Feb 18 – Mar 11 | Aug 14 – Sep 4 |
| Spinach | — | — | Feb 18 – Mar 11 | Sep 11 – Oct 2 |
| Radishes | — | — | Feb 25 – Apr 8 | Sep 25 – Oct 16 |
| Cucumbers | Mar 4 – Mar 11 | Apr 15 – Apr 22 | Apr 8 – Apr 22 | Aug 21 – Sep 4 |
| Zucchini & Summer Squash | Mar 4 – Mar 11 | — | Apr 8 – Apr 22 | Aug 28 – Sep 11 |
| Winter Squash & Pumpkins | Mar 4 – Mar 11 | — | Apr 8 – Apr 22 | — |
| Melons & Watermelon | Mar 4 – Mar 11 | Apr 15 – Apr 29 | — | — |
| Carrots | — | — | Mar 11 – Apr 8 | Aug 14 – Aug 28 |
| Beets | — | — | Mar 11 – Apr 8 | Aug 28 – Sep 11 |
| Potatoes | — | — | Mar 11 – Apr 1 | — |
| Swiss Chard | — | — | Mar 18 – Apr 15 | Aug 28 – Sep 11 |
| Cilantro | — | — | Mar 18 – Apr 8 | Sep 11 – Oct 2 |
| Green Beans | — | — | Apr 8 – Apr 29 | Aug 21 – Sep 4 |
| Sweet Corn | — | — | Apr 8 – Apr 22 | — |
| Sweet Potatoes | — | Apr 15 – May 6 | — | — |
| Garlic | — | — | — | Oct 23 – Nov 27 |
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 Sonora, TX weather station, 4 km away (elevation 2,139 ft (652 m)).
Frost dates near Sonora
- Eldorado Mar 22 · Nov 10
- Roosevelt Apr 8 · Oct 28
- Fort Mc Kavett Apr 2 · Nov 2
- Ozona Mar 21 · Nov 6
- Rocksprings Mar 8 · Nov 25
- Telegraph Apr 8 · Oct 28
- Christoval Mar 22 · Nov 10
- Knickerbocker Mar 22 · Nov 10
- Mertzon Apr 1 · Nov 4
- Junction Mar 25 · Nov 7
Frequently asked questions
When is the last frost in Sonora, TX?
The median last spring frost in Sonora, TX is April 1. There is still about a 10% chance of frost after April 20, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Sonora, TX?
The median first fall frost is November 6, with about a 10% chance of frost before October 24.
How long is the growing season in Sonora, TX?
About 219 days between the median last spring frost and first fall frost.
What planting zone is Sonora, TX?
Sonora, TX is in USDA hardiness zone 8a.