Sweeny, TX frost dates
Last spring frostFeb 13median date
First fall frostDec 8median date
Growing season298 daysfrost-free
Hardiness zone9bZone 9b
How Sweeny compares
- In 8 years out of 10, the last spring frost in Sweeny falls between January 10 and March 17, a 66-day window. The first fall frost falls between November 18 and January 12.
- The median last frost is 30 days earlier than the Texas median of Mar 15.
- Its 298-day growing season is among the longest of the 1,316 Texas places with a regular frost season.
- The last frost is 7 days earlier than the zone 9b median of Feb 20. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9b chart.
- The weather station records an average of 10 nights a year at or below 32°F.
- Nearby Sugar Land, TX, 62 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) | January 10 |
| 50% (median) | February 13 |
| 10% (safe for tender plants) | March 17 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 18 |
| 50% (median) | December 8 |
| 90% (late) | January 12 |
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 Sweeny, TX
Sweeny, TX frost dates — last frost Feb 13, first frost Dec 8, zone 9b. whenisthelastfrost.com
Crop
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Start indoors: Nov 21 to Dec 5Transplant outside: Jan 16 to Jan 30
Start indoors: Dec 5 to Dec 19Transplant outside: Feb 27 to Mar 13
Start indoors: Dec 5 to Dec 19Transplant outside: Feb 27 to Mar 13
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Feb 20 to Mar 6
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 23 to Feb 6Sow outdoors: Jan 16 to Feb 20Plant for fall: Oct 13 to Nov 10
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 16 to Jan 30Sow outdoors: Jan 16 to Jan 30Plant for fall: Sep 29 to Oct 20
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 30 to Feb 13Plant for fall: Sep 1 to Sep 22
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 23 to Feb 6Plant for fall: Sep 1 to Sep 22
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 30 to Feb 13Plant for fall: Sep 1 to Sep 22
Start indoors: Jan 2 to Jan 16Transplant outside: Mar 6 to Mar 20Sow outdoors: Mar 6 to Mar 20
Start indoors: Jan 2 to Jan 16Transplant outside: Feb 20 to Mar 6
Sow outdoors: Jan 2 to Jan 23Plant for fall: Sep 15 to Oct 6
Sow outdoors: Jan 2 to Jan 23Plant for fall: Oct 13 to Nov 3
Sow outdoors: Jan 9 to Feb 20Plant for fall: Oct 27 to Nov 17
Start indoors: Jan 16 to Jan 23Transplant outside: Feb 27 to Mar 6Sow outdoors: Feb 20 to Mar 6Plant for fall: Sep 22 to Oct 6
Start indoors: Jan 16 to Jan 23Sow outdoors: Feb 20 to Mar 6Plant for fall: Sep 29 to Oct 13
Start indoors: Jan 16 to Jan 23Sow outdoors: Feb 20 to Mar 6
Start indoors: Jan 16 to Jan 23Transplant outside: Feb 27 to Mar 13
Sow outdoors: Jan 23 to Feb 20Plant for fall: Sep 15 to Sep 29
Sow outdoors: Jan 23 to Feb 20Plant for fall: Sep 29 to Oct 13
Sow outdoors: Jan 23 to Feb 13
Sow outdoors: Jan 30 to Feb 27Plant for fall: Sep 29 to Oct 13
Sow outdoors: Jan 30 to Feb 20Plant for fall: Oct 13 to Nov 3
Sow outdoors: Feb 20 to Mar 13Plant for fall: Sep 22 to Oct 6
Sow outdoors: Feb 20 to Mar 6
Transplant outside: Feb 27 to Mar 20
Plant for fall: Nov 24 to Dec 29
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Sweeny, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 21 – Dec 5 | Jan 16 – Jan 30 | — | — |
| Peppers | Dec 5 – Dec 19 | Feb 27 – Mar 13 | — | — |
| Eggplant | Dec 5 – Dec 19 | Feb 27 – Mar 13 | — | — |
| Tomatoes | Dec 19 – Jan 2 | Feb 20 – Mar 6 | — | — |
| Lettuce | Dec 19 – Jan 2 | Jan 23 – Feb 6 | Jan 16 – Feb 20 | Oct 13 – Nov 10 |
| Kale | Dec 19 – Jan 2 | Jan 16 – Jan 30 | Jan 16 – Jan 30 | Sep 29 – Oct 20 |
| Broccoli | Dec 19 – Jan 2 | Jan 30 – Feb 13 | — | Sep 1 – Sep 22 |
| Cabbage | Dec 19 – Jan 2 | Jan 23 – Feb 6 | — | Sep 1 – Sep 22 |
| Cauliflower | Dec 19 – Jan 2 | Jan 30 – Feb 13 | — | Sep 1 – Sep 22 |
| Okra | Jan 2 – Jan 16 | Mar 6 – Mar 20 | Mar 6 – Mar 20 | — |
| Basil | Jan 2 – Jan 16 | Feb 20 – Mar 6 | — | — |
| Peas | — | — | Jan 2 – Jan 23 | Sep 15 – Oct 6 |
| Spinach | — | — | Jan 2 – Jan 23 | Oct 13 – Nov 3 |
| Radishes | — | — | Jan 9 – Feb 20 | Oct 27 – Nov 17 |
| Cucumbers | Jan 16 – Jan 23 | Feb 27 – Mar 6 | Feb 20 – Mar 6 | Sep 22 – Oct 6 |
| Zucchini & Summer Squash | Jan 16 – Jan 23 | — | Feb 20 – Mar 6 | Sep 29 – Oct 13 |
| Winter Squash & Pumpkins | Jan 16 – Jan 23 | — | Feb 20 – Mar 6 | — |
| Melons & Watermelon | Jan 16 – Jan 23 | Feb 27 – Mar 13 | — | — |
| Carrots | — | — | Jan 23 – Feb 20 | Sep 15 – Sep 29 |
| Beets | — | — | Jan 23 – Feb 20 | Sep 29 – Oct 13 |
| Potatoes | — | — | Jan 23 – Feb 13 | — |
| Swiss Chard | — | — | Jan 30 – Feb 27 | Sep 29 – Oct 13 |
| Cilantro | — | — | Jan 30 – Feb 20 | Oct 13 – Nov 3 |
| Green Beans | — | — | Feb 20 – Mar 13 | Sep 22 – Oct 6 |
| Sweet Corn | — | — | Feb 20 – Mar 6 | — |
| Sweet Potatoes | — | Feb 27 – Mar 20 | — | — |
| Garlic | — | — | — | Nov 24 – Dec 29 |
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 Angleton Brazoria Ap, TX weather station, 24 km away (elevation 26 ft (8 m)).
Frost dates near Sweeny
- Old Ocean Feb 20 · Dec 3
- Brazoria Feb 13 · Dec 8
- West Columbia Feb 13 · Dec 8
- Cedar Lane Feb 20 · Dec 3
- Van Vleck Feb 20 · Dec 3
- Danciger Feb 20 · Dec 3
- Lake Jackson Feb 13 · Dec 8
- Pledger Feb 20 · Dec 3
- Bay City Feb 20 · Dec 3
- Clute Jan 27 · Jan 1
Frequently asked questions
When is the last frost in Sweeny, TX?
The median last spring frost in Sweeny, TX is February 13. There is still about a 10% chance of frost after March 17, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Sweeny, TX?
The median first fall frost is December 8, with about a 10% chance of frost before November 18.
How long is the growing season in Sweeny, TX?
About 298 days between the median last spring frost and first fall frost.
What planting zone is Sweeny, TX?
Sweeny, TX is in USDA hardiness zone 9b.