Frost dates for 79356Post, TX
The average last spring frost in Post is April 1 and the average first fall frost is November 9, giving a typical growing season of about 223 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 1
- Average first fall frost
- Nov 9
- Growing season
- 223 days
Safer after Apr 19 (1-in-10 risk)
Possible by Oct 25 (1-in-10 risk)
First frost typically in 13 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) | Mar 25 · Apr 10 · Apr 26 | Oct 17 · Oct 30 · Nov 12 | 203 days | 100% |
| Frost / freeze (32°F) | Mar 10 · Apr 1 · Apr 19 | Oct 25 · Nov 9 · Nov 23 | 223 days | 100% |
| Hard freeze (28°F) | Feb 26 · Mar 17 · Apr 5 | Nov 2 · Nov 19 · Dec 5 | 246 days | 100% |
Planting calendar for Post
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 | Mar 1 – May 7 |
| Tomatoes | Transplant outdoors | Apr 17 – Jul 20 |
| Peppers | Start seeds indoors | Mar 1 – Apr 1 |
| Peppers | Transplant outdoors | May 1 – Jun 1 |
| Eggplant | Start seeds indoors | Mar 18 – Apr 16 |
| Eggplant | Transplant outdoors | May 1 – Jun 1 |
| Cucumbers | Sow outdoors | May 1 – Jul 30 |
| Summer squash | Sow outdoors | Apr 17 – Jun 1 |
| Winter squash & pumpkins | Sow outdoors | May 1 – Jun 1 |
| Snap beans | Sow outdoors | Apr 17 – Aug 22 |
| Sweet corn | Sow outdoors | Apr 17 – Jul 20 |
| Watermelon & cantaloupe | Sow outdoors | May 1 – Jun 1 |
| Okra | Sow outdoors | Apr 24 – May 17 |
| Peas | Sow outdoors (spring) | Mar 1 – Apr 16 |
| Potatoes | Plant outdoors (spring) | Mar 1 – May 1 |
| Onions | Start seeds indoors (spring) | Jan 18 – Feb 14 |
| Onions | Transplant outdoors (spring) | Mar 18 – Apr 16 |
| Broccoli | Start seeds indoors (spring) | Feb 11 – Mar 17 |
| Broccoli | Transplant outdoors (spring) | Mar 18 – Apr 16 |
| Broccoli | Start seeds indoors (fall) | Jul 10 – Jul 20 |
| Broccoli | Transplant outdoors (fall) | Aug 9 – Aug 20 |
| Cabbage | Start seeds indoors (spring) | Feb 1 – Mar 1 |
| Cabbage | Transplant outdoors (spring) | Mar 1 – Apr 1 |
| Cabbage | Start seeds indoors (fall) | Jun 30 – Jul 30 |
| Cabbage | Transplant outdoors (fall) | Jul 30 – Aug 30 |
| Leaf lettuce | Sow outdoors (spring) | Mar 1 – May 17 |
| Leaf lettuce | Sow outdoors (fall) | Jul 30 – Sep 15 |
| Spinach | Sow outdoors (spring) | Feb 22 – Apr 7 |
| Spinach | Sow outdoors (fall) | Aug 16 – Sep 20 |
| Radishes | Sow outdoors (spring) | Mar 1 – Apr 21 |
| Radishes | Sow outdoors (fall) | Jul 30 – Sep 30 |
| Kale | Sow outdoors (spring) | Mar 18 – Apr 7 |
| Kale | Sow outdoors (fall) | Jul 23 – Aug 30 |
| Carrots | Sow outdoors (spring) | Apr 1 – May 17 |
| Carrots | Sow outdoors (fall) | Jun 30 – Aug 15 |
| Garlic | Plant outdoors (fall) | Oct 30 – Nov 30 |
Where these dates come from
ZIP code 79356 is matched to the NOAA station Post, TX, 1.7 km away, at 2,611 ft elevation (33 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Post, TX (used) | 2,611 ft | Apr 1 | Nov 9 |
| Lake Alan Henry, TX | 2,280 ft | Mar 29 | Nov 10 |
| Tahoka, TX | 3,120 ft | Apr 2 | Nov 8 |
| White River Reservoir, TX | 2,412 ft | Mar 31 | Nov 8 |
Frost dates near Post
- Justiceburg, TX 79330 · last Mar 29, first Nov 10
- Wilson, TX 79381 · last Apr 2, first Nov 8
- Slaton, TX 79364 · last Apr 2, first Nov 8
- Tahoka, TX 79373 · last Apr 2, first Nov 8
- Ransom Canyon, TX 79366 · last Apr 4, first Nov 2
- Fluvanna, TX 79517 · last Mar 27, first Nov 10
- Odonnell, TX 79351 · last Apr 2, first Nov 8
- Gail, TX 79738 · last Mar 27, first Nov 8
Frequently asked questions
- When is the last frost in Post, TX?
- For ZIP code 79356, the average last spring frost (32°F) is April 1, based on NOAA 1991-2020 climate normals for the Post, TX weather station. There is a 1-in-10 chance of a frost after April 19.
- When is the first frost in Post, TX?
- The average first fall frost (32°F) is November 9. There is a 1-in-10 chance of frost by October 25, so tender plants are at risk from that point on.
- How long is the growing season in 79356?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 223 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.