Frost dates for 77834Brenham, TX
The average last spring frost in Brenham is March 2 and the average first fall frost is November 30, giving a typical growing season of about 273 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 2
- Average first fall frost
- Nov 30
- Growing season
- 273 days
Safer after Mar 20 (1-in-10 risk)
Possible by Nov 8 (1-in-10 risk)
First frost typically in 34 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Feb 23 · Mar 13 · Apr 1 | Nov 1 · Nov 17 · Dec 5 | 249 days | 100% |
| Frost / freeze (32°F) | Jan 31 · Mar 2 · Mar 20 | Nov 8 · Nov 30 · Dec 23 | 273 days | 100% |
| Hard freeze (28°F) | Jan 6 · Feb 10 · Mar 11 | Nov 18 · Dec 18 · Jan 19 | 307 days | 96% |
Planting calendar for Brenham
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Jan 30 – Apr 7 |
| Tomatoes | Transplant outdoors | Mar 18 – Aug 10 |
| Peppers | Start seeds indoors | Jan 30 – Mar 2 |
| Peppers | Transplant outdoors | Apr 1 – May 2 |
| Eggplant | Start seeds indoors | Feb 16 – Mar 17 |
| Eggplant | Transplant outdoors | Apr 1 – May 2 |
| Cucumbers | Sow outdoors | Apr 1 – Aug 20 |
| Summer squash | Sow outdoors | Mar 18 – May 2 |
| Winter squash & pumpkins | Sow outdoors | Apr 1 – May 2 |
| Snap beans | Sow outdoors | Mar 18 – Sep 12 |
| Sweet corn | Sow outdoors | Mar 18 – Aug 10 |
| Watermelon & cantaloupe | Sow outdoors | Apr 1 – May 2 |
| Okra | Sow outdoors | Mar 25 – Apr 17 |
| Peas | Sow outdoors (spring) | Jan 30 – Mar 17 |
| Potatoes | Plant outdoors (spring) | Jan 30 – Apr 1 |
| Onions | Start seeds indoors (spring) | Dec 19 – Jan 15 |
| Onions | Transplant outdoors (spring) | Feb 16 – Mar 17 |
| Broccoli | Start seeds indoors (spring) | Jan 12 – Feb 15 |
| Broccoli | Transplant outdoors (spring) | Feb 16 – Mar 17 |
| Broccoli | Start seeds indoors (fall) | Jul 31 – Aug 10 |
| Broccoli | Transplant outdoors (fall) | Aug 30 – Sep 10 |
| Cabbage | Start seeds indoors (spring) | Jan 2 – Jan 30 |
| Cabbage | Transplant outdoors (spring) | Jan 30 – Mar 2 |
| Cabbage | Start seeds indoors (fall) | Jul 21 – Aug 20 |
| Cabbage | Transplant outdoors (fall) | Aug 20 – Sep 20 |
| Leaf lettuce | Sow outdoors (spring) | Jan 30 – Apr 17 |
| Leaf lettuce | Sow outdoors (fall) | Aug 20 – Oct 6 |
| Spinach | Sow outdoors (spring) | Jan 23 – Mar 8 |
| Spinach | Sow outdoors (fall) | Sep 6 – Oct 11 |
| Radishes | Sow outdoors (spring) | Jan 30 – Mar 22 |
| Radishes | Sow outdoors (fall) | Aug 20 – Oct 21 |
| Kale | Sow outdoors (spring) | Feb 16 – Mar 8 |
| Kale | Sow outdoors (fall) | Aug 13 – Sep 20 |
| Carrots | Sow outdoors (spring) | Mar 2 – Apr 17 |
| Carrots | Sow outdoors (fall) | Jul 21 – Sep 5 |
| Garlic | Plant outdoors (fall) | Nov 20 – Dec 21 |
Where these dates come from
ZIP code 77834 is matched to the NOAA station Brenham, TX, 0.9 km away, at 313 ft elevation (28 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Brenham, TX (used) | 313 ft | Mar 2 | Nov 30 |
| Bellville 6Nne, TX | 280 ft | Feb 28 | Dec 2 |
| Somerville Dam, TX | 263 ft | Mar 18 | Nov 9 |
| Washington Sp, TX | 215 ft | Mar 7 | Nov 19 |
Frost dates near Brenham
- Brenham, TX 77833 · last Mar 2, first Nov 30
- Kenney, TX 77452 · last Feb 28, first Dec 2
- Chappell Hill, TX 77426 · last Mar 7, first Nov 19
- Bleiblerville, TX 78931 · last Mar 2, first Nov 30
- Burton, TX 77835 · last Mar 2, first Nov 30
- Industry, TX 78944 · last Mar 2, first Nov 30
- Washington, TX 77880 · last Mar 7, first Nov 19
- Bellville, TX 77418 · last Feb 28, first Dec 2
Frequently asked questions
- When is the last frost in Brenham, TX?
- For ZIP code 77834, the average last spring frost (32°F) is March 2, based on NOAA 1991-2020 climate normals for the Brenham, TX weather station. There is a 1-in-10 chance of a frost after March 20.
- When is the first frost in Brenham, TX?
- The average first fall frost (32°F) is November 30. There is a 1-in-10 chance of frost by November 8, so tender plants are at risk from that point on.
- How long is the growing season in 77834?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 273 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.