Frost dates for 79733Forsan, TX
The average last spring frost in Forsan is March 20 and the average first fall frost is November 13, giving a typical growing season of about 239 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 20
- Average first fall frost
- Nov 13
- Growing season
- 239 days
Safer after Apr 7 (1-in-10 risk)
Possible by Oct 31 (1-in-10 risk)
First frost typically in 18 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 15 · Apr 3 · Apr 24 | Oct 23 · Nov 5 · Nov 17 | 214 days | 100% |
| Frost / freeze (32°F) | Mar 1 · Mar 20 · Apr 7 | Oct 31 · Nov 13 · Nov 29 | 239 days | 100% |
| Hard freeze (28°F) | Feb 16 · Mar 6 · Mar 29 | Nov 7 · Nov 24 · Dec 12 | 261 days | 100% |
Planting calendar for Forsan
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 | Feb 17 – Apr 25 |
| Tomatoes | Transplant outdoors | Apr 5 – Jul 24 |
| Peppers | Start seeds indoors | Feb 17 – Mar 20 |
| Peppers | Transplant outdoors | Apr 19 – May 20 |
| Eggplant | Start seeds indoors | Mar 6 – Apr 4 |
| Eggplant | Transplant outdoors | Apr 19 – May 20 |
| Cucumbers | Sow outdoors | Apr 19 – Aug 3 |
| Summer squash | Sow outdoors | Apr 5 – May 20 |
| Winter squash & pumpkins | Sow outdoors | Apr 19 – May 20 |
| Snap beans | Sow outdoors | Apr 5 – Aug 26 |
| Sweet corn | Sow outdoors | Apr 5 – Jul 24 |
| Watermelon & cantaloupe | Sow outdoors | Apr 19 – May 20 |
| Okra | Sow outdoors | Apr 12 – May 5 |
| Peas | Sow outdoors (spring) | Feb 17 – Apr 4 |
| Potatoes | Plant outdoors (spring) | Feb 17 – Apr 19 |
| Onions | Start seeds indoors (spring) | Jan 6 – Feb 2 |
| Onions | Transplant outdoors (spring) | Mar 6 – Apr 4 |
| Broccoli | Start seeds indoors (spring) | Jan 30 – Mar 5 |
| Broccoli | Transplant outdoors (spring) | Mar 6 – Apr 4 |
| Broccoli | Start seeds indoors (fall) | Jul 14 – Jul 24 |
| Broccoli | Transplant outdoors (fall) | Aug 13 – Aug 24 |
| Cabbage | Start seeds indoors (spring) | Jan 20 – Feb 17 |
| Cabbage | Transplant outdoors (spring) | Feb 17 – Mar 20 |
| Cabbage | Start seeds indoors (fall) | Jul 4 – Aug 3 |
| Cabbage | Transplant outdoors (fall) | Aug 3 – Sep 3 |
| Leaf lettuce | Sow outdoors (spring) | Feb 17 – May 5 |
| Leaf lettuce | Sow outdoors (fall) | Aug 3 – Sep 19 |
| Spinach | Sow outdoors (spring) | Feb 10 – Mar 26 |
| Spinach | Sow outdoors (fall) | Aug 20 – Sep 24 |
| Radishes | Sow outdoors (spring) | Feb 17 – Apr 9 |
| Radishes | Sow outdoors (fall) | Aug 3 – Oct 4 |
| Kale | Sow outdoors (spring) | Mar 6 – Mar 26 |
| Kale | Sow outdoors (fall) | Jul 27 – Sep 3 |
| Carrots | Sow outdoors (spring) | Mar 20 – May 5 |
| Carrots | Sow outdoors (fall) | Jul 4 – Aug 19 |
| Garlic | Plant outdoors (fall) | Nov 3 – Dec 4 |
Where these dates come from
ZIP code 79733 is matched to the NOAA station Big Spring, TX, 17 km away, at 2,510 ft elevation (279 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Big Spring, TX (used) | 2,510 ft | Mar 20 | Nov 13 |
| Garden City, TX | 2,655 ft | Apr 2 | Nov 5 |
| Sterling City, TX | 2,280 ft | Mar 31 | Nov 6 |
| Colorado City, TX | 2,110 ft | Apr 4 | Nov 5 |
Frost dates near Forsan
- Big Spring, TX 79721 · last Mar 20, first Nov 13
- Coahoma, TX 79511 · last Mar 20, first Nov 13
- Garden City, TX 79739 · last Apr 2, first Nov 5
- Westbrook, TX 79565 · last Apr 4, first Nov 5
- Stanton, TX 79782 · last Mar 26, first Nov 9
- Knott, TX 79748 · last Mar 20, first Nov 13
- Sterling City, TX 76951 · last Mar 31, first Nov 6
- Lenorah, TX 79749 · last Mar 26, first Nov 9
Frequently asked questions
- When is the last frost in Forsan, TX?
- For ZIP code 79733, the average last spring frost (32°F) is March 20, based on NOAA 1991-2020 climate normals for the Big Spring, TX weather station. There is a 1-in-10 chance of a frost after April 7.
- When is the first frost in Forsan, TX?
- The average first fall frost (32°F) is November 13. There is a 1-in-10 chance of frost by October 31, so tender plants are at risk from that point on.
- How long is the growing season in 79733?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 239 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.