Frost dates for 74731Cartwright, OK
The average last spring frost in Cartwright is March 14 and the average first fall frost is November 19, giving a typical growing season of about 250 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 14
- Average first fall frost
- Nov 19
- Growing season
- 250 days
Safer after Apr 1 (1-in-10 risk)
Possible by Nov 2 (1-in-10 risk)
First frost typically in 25 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 8 · Mar 28 · Apr 15 | Oct 26 · Nov 9 · Nov 24 | 225 days | 100% |
| Frost / freeze (32°F) | Feb 25 · Mar 14 · Apr 1 | Nov 2 · Nov 19 · Dec 6 | 250 days | 100% |
| Hard freeze (28°F) | Feb 10 · Mar 2 · Mar 21 | Nov 11 · Nov 30 · Dec 20 | 274 days | 100% |
Planting calendar for Cartwright
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 11 – Apr 19 |
| Tomatoes | Transplant outdoors | Mar 30 – Jul 30 |
| Peppers | Start seeds indoors | Feb 11 – Mar 14 |
| Peppers | Transplant outdoors | Apr 13 – May 14 |
| Eggplant | Start seeds indoors | Feb 28 – Mar 29 |
| Eggplant | Transplant outdoors | Apr 13 – May 14 |
| Cucumbers | Sow outdoors | Apr 13 – Aug 9 |
| Summer squash | Sow outdoors | Mar 30 – May 14 |
| Winter squash & pumpkins | Sow outdoors | Apr 13 – May 14 |
| Snap beans | Sow outdoors | Mar 30 – Sep 1 |
| Sweet corn | Sow outdoors | Mar 30 – Jul 30 |
| Watermelon & cantaloupe | Sow outdoors | Apr 13 – May 14 |
| Okra | Sow outdoors | Apr 6 – Apr 29 |
| Peas | Sow outdoors (spring) | Feb 11 – Mar 29 |
| Potatoes | Plant outdoors (spring) | Feb 11 – Apr 13 |
| Onions | Start seeds indoors (spring) | Dec 31 – Jan 27 |
| Onions | Transplant outdoors (spring) | Feb 28 – Mar 29 |
| Broccoli | Start seeds indoors (spring) | Jan 24 – Feb 27 |
| Broccoli | Transplant outdoors (spring) | Feb 28 – Mar 29 |
| Broccoli | Start seeds indoors (fall) | Jul 20 – Jul 30 |
| Broccoli | Transplant outdoors (fall) | Aug 19 – Aug 30 |
| Cabbage | Start seeds indoors (spring) | Jan 14 – Feb 11 |
| Cabbage | Transplant outdoors (spring) | Feb 11 – Mar 14 |
| Cabbage | Start seeds indoors (fall) | Jul 10 – Aug 9 |
| Cabbage | Transplant outdoors (fall) | Aug 9 – Sep 9 |
| Leaf lettuce | Sow outdoors (spring) | Feb 11 – Apr 29 |
| Leaf lettuce | Sow outdoors (fall) | Aug 9 – Sep 25 |
| Spinach | Sow outdoors (spring) | Feb 4 – Mar 20 |
| Spinach | Sow outdoors (fall) | Aug 26 – Sep 30 |
| Radishes | Sow outdoors (spring) | Feb 11 – Apr 3 |
| Radishes | Sow outdoors (fall) | Aug 9 – Oct 10 |
| Kale | Sow outdoors (spring) | Feb 28 – Mar 20 |
| Kale | Sow outdoors (fall) | Aug 2 – Sep 9 |
| Carrots | Sow outdoors (spring) | Mar 14 – Apr 29 |
| Carrots | Sow outdoors (fall) | Jul 10 – Aug 25 |
| Garlic | Plant outdoors (fall) | Nov 9 – Dec 10 |
Where these dates come from
ZIP code 74731 is matched to the NOAA station Sherman, TX, 19.4 km away, at 760 ft elevation (81 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Sherman, TX (used) | 760 ft | Mar 14 | Nov 19 |
| Durant, OK | 600 ft | Mar 31 | Nov 5 |
| Durant 6Sse Mesonet, OK | 646 ft | Mar 19 | Nov 12 |
| Madill, OK | 770 ft | Mar 27 | Nov 8 |
Frost dates near Cartwright
- Platter, OK 74753 · last Mar 31, first Nov 5
- Colbert, OK 74733 · last Mar 31, first Nov 5
- Pottsboro, TX 75076 · last Mar 14, first Nov 19
- Denison, TX 75020 · last Mar 14, first Nov 19
- Calera, OK 74730 · last Mar 31, first Nov 5
- Mead, OK 73449 · last Mar 31, first Nov 5
- Kingston, OK 73439 · last Mar 27, first Nov 8
- Achille, OK 74720 · last Mar 31, first Nov 5
Frequently asked questions
- When is the last frost in Cartwright, OK?
- For ZIP code 74731, the average last spring frost (32°F) is March 14, based on NOAA 1991-2020 climate normals for the Sherman, TX weather station. There is a 1-in-10 chance of a frost after April 1.
- When is the first frost in Cartwright, OK?
- The average first fall frost (32°F) is November 19. There is a 1-in-10 chance of frost by November 2, so tender plants are at risk from that point on.
- How long is the growing season in 74731?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 250 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.