Frost dates for 75651Harleton, TX
The average last spring frost in Harleton is March 18 and the average first fall frost is November 8, giving a typical growing season of about 236 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 18
- Average first fall frost
- Nov 8
- Growing season
- 236 days
Safer after Apr 7 (1-in-10 risk)
Possible by Oct 26 (1-in-10 risk)
First frost typically in 5 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 13 · Apr 2 · Apr 21 | Oct 18 · Oct 30 · Nov 15 | 212 days | 100% |
| Frost / freeze (32°F) | Feb 28 · Mar 18 · Apr 7 | Oct 26 · Nov 8 · Nov 30 | 236 days | 100% |
| Hard freeze (28°F) | Feb 7 · Mar 3 · Mar 22 | Nov 1 · Nov 22 · Dec 12 | 265 days | 100% |
Planting calendar for Harleton
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 15 – Apr 23 |
| Tomatoes | Transplant outdoors | Apr 3 – Jul 19 |
| Peppers | Start seeds indoors | Feb 15 – Mar 18 |
| Peppers | Transplant outdoors | Apr 17 – May 18 |
| Eggplant | Start seeds indoors | Mar 4 – Apr 2 |
| Eggplant | Transplant outdoors | Apr 17 – May 18 |
| Cucumbers | Sow outdoors | Apr 17 – Jul 29 |
| Summer squash | Sow outdoors | Apr 3 – May 18 |
| Winter squash & pumpkins | Sow outdoors | Apr 17 – May 18 |
| Snap beans | Sow outdoors | Apr 3 – Aug 21 |
| Sweet corn | Sow outdoors | Apr 3 – Jul 19 |
| Watermelon & cantaloupe | Sow outdoors | Apr 17 – May 18 |
| Okra | Sow outdoors | Apr 10 – May 3 |
| Peas | Sow outdoors (spring) | Feb 15 – Apr 2 |
| Potatoes | Plant outdoors (spring) | Feb 15 – Apr 17 |
| Onions | Start seeds indoors (spring) | Jan 4 – Jan 31 |
| Onions | Transplant outdoors (spring) | Mar 4 – Apr 2 |
| Broccoli | Start seeds indoors (spring) | Jan 28 – Mar 3 |
| Broccoli | Transplant outdoors (spring) | Mar 4 – Apr 2 |
| Broccoli | Start seeds indoors (fall) | Jul 9 – Jul 19 |
| Broccoli | Transplant outdoors (fall) | Aug 8 – Aug 19 |
| Cabbage | Start seeds indoors (spring) | Jan 18 – Feb 15 |
| Cabbage | Transplant outdoors (spring) | Feb 15 – Mar 18 |
| Cabbage | Start seeds indoors (fall) | Jun 29 – Jul 29 |
| Cabbage | Transplant outdoors (fall) | Jul 29 – Aug 29 |
| Leaf lettuce | Sow outdoors (spring) | Feb 15 – May 3 |
| Leaf lettuce | Sow outdoors (fall) | Jul 29 – Sep 14 |
| Spinach | Sow outdoors (spring) | Feb 8 – Mar 24 |
| Spinach | Sow outdoors (fall) | Aug 15 – Sep 19 |
| Radishes | Sow outdoors (spring) | Feb 15 – Apr 7 |
| Radishes | Sow outdoors (fall) | Jul 29 – Sep 29 |
| Kale | Sow outdoors (spring) | Mar 4 – Mar 24 |
| Kale | Sow outdoors (fall) | Jul 22 – Aug 29 |
| Carrots | Sow outdoors (spring) | Mar 18 – May 3 |
| Carrots | Sow outdoors (fall) | Jun 29 – Aug 14 |
| Garlic | Plant outdoors (fall) | Oct 29 – Nov 29 |
Where these dates come from
ZIP code 75651 is matched to the NOAA station Jefferson, TX, 15.9 km away, at 211 ft elevation (8 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Jefferson, TX (used) | 211 ft | Mar 18 | Nov 8 |
| Marshall, TX | 302 ft | Mar 20 | Nov 11 |
| Hallsville 4 S, TX | 322 ft | Mar 15 | Nov 15 |
| Longview #2, TX | 504 ft | Mar 7 | Nov 23 |
Frost dates near Harleton
- Woodlawn, TX 75694 · last Mar 18, first Nov 8
- Marshall, TX 75671 · last Mar 20, first Nov 11
- Hallsville, TX 75650 · last Mar 15, first Nov 15
- Jefferson, TX 75657 · last Mar 18, first Nov 8
- Avinger, TX 75630 · last Mar 8, first Nov 22
- Scottsville, TX 75688 · last Mar 20, first Nov 11
- Karnack, TX 75661 · last Mar 20, first Nov 11
- Diana, TX 75640 · last Mar 8, first Nov 22
Frequently asked questions
- When is the last frost in Harleton, TX?
- For ZIP code 75651, the average last spring frost (32°F) is March 18, based on NOAA 1991-2020 climate normals for the Jefferson, TX weather station. There is a 1-in-10 chance of a frost after April 7.
- When is the first frost in Harleton, TX?
- The average first fall frost (32°F) is November 8. There is a 1-in-10 chance of frost by October 26, so tender plants are at risk from that point on.
- How long is the growing season in 75651?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 236 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.