Frost dates for 74538Coalgate, OK
The average last spring frost in Coalgate is March 31 and the average first fall frost is November 4, giving a typical growing season of about 219 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 31
- Average first fall frost
- Nov 4
- Growing season
- 219 days
Safer after Apr 18 (1-in-10 risk)
Possible by Oct 22 (1-in-10 risk)
First frost typically in 10 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 26 · Apr 11 · Apr 28 | Oct 15 · Oct 27 · Nov 9 | 198 days | 100% |
| Frost / freeze (32°F) | Mar 9 · Mar 31 · Apr 18 | Oct 22 · Nov 4 · Nov 21 | 219 days | 100% |
| Hard freeze (28°F) | Feb 26 · Mar 16 · Apr 4 | Oct 30 · Nov 14 · Dec 2 | 242 days | 100% |
Planting calendar for Coalgate
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 28 – May 6 |
| Tomatoes | Transplant outdoors | Apr 16 – Jul 15 |
| Peppers | Start seeds indoors | Feb 28 – Mar 31 |
| Peppers | Transplant outdoors | Apr 30 – May 31 |
| Eggplant | Start seeds indoors | Mar 17 – Apr 15 |
| Eggplant | Transplant outdoors | Apr 30 – May 31 |
| Cucumbers | Sow outdoors | Apr 30 – Jul 25 |
| Summer squash | Sow outdoors | Apr 16 – May 31 |
| Winter squash & pumpkins | Sow outdoors | Apr 30 – May 31 |
| Snap beans | Sow outdoors | Apr 16 – Aug 17 |
| Sweet corn | Sow outdoors | Apr 16 – Jul 15 |
| Watermelon & cantaloupe | Sow outdoors | Apr 30 – May 31 |
| Okra | Sow outdoors | Apr 23 – May 16 |
| Peas | Sow outdoors (spring) | Feb 28 – Apr 15 |
| Potatoes | Plant outdoors (spring) | Feb 28 – Apr 30 |
| Onions | Start seeds indoors (spring) | Jan 17 – Feb 13 |
| Onions | Transplant outdoors (spring) | Mar 17 – Apr 15 |
| Broccoli | Start seeds indoors (spring) | Feb 10 – Mar 16 |
| Broccoli | Transplant outdoors (spring) | Mar 17 – Apr 15 |
| Broccoli | Start seeds indoors (fall) | Jul 5 – Jul 15 |
| Broccoli | Transplant outdoors (fall) | Aug 4 – Aug 15 |
| Cabbage | Start seeds indoors (spring) | Jan 31 – Feb 28 |
| Cabbage | Transplant outdoors (spring) | Feb 28 – Mar 31 |
| Cabbage | Start seeds indoors (fall) | Jun 25 – Jul 25 |
| Cabbage | Transplant outdoors (fall) | Jul 25 – Aug 25 |
| Leaf lettuce | Sow outdoors (spring) | Feb 28 – May 16 |
| Leaf lettuce | Sow outdoors (fall) | Jul 25 – Sep 10 |
| Spinach | Sow outdoors (spring) | Feb 21 – Apr 6 |
| Spinach | Sow outdoors (fall) | Aug 11 – Sep 15 |
| Radishes | Sow outdoors (spring) | Feb 28 – Apr 20 |
| Radishes | Sow outdoors (fall) | Jul 25 – Sep 25 |
| Kale | Sow outdoors (spring) | Mar 17 – Apr 6 |
| Kale | Sow outdoors (fall) | Jul 18 – Aug 25 |
| Carrots | Sow outdoors (spring) | Mar 31 – May 16 |
| Carrots | Sow outdoors (fall) | Jun 25 – Aug 10 |
| Garlic | Plant outdoors (fall) | Oct 25 – Nov 25 |
Where these dates come from
ZIP code 74538 is matched to the NOAA station Centrahoma 2 Ese, OK, 11.5 km away, at 710 ft elevation (93 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Centrahoma 2 Ese, OK (used) | 710 ft | Mar 31 | Nov 4 |
| Centrahoma 1E Mesonet, OK | 682 ft | Mar 31 | Nov 1 |
| Atoka, OK | 565 ft | Apr 5 | Nov 1 |
| Lane 1Wnw Mesonet, OK | 593 ft | Mar 29 | Nov 4 |
Frost dates near Coalgate
- Lehigh, OK 74556 · last Apr 5, first Nov 1
- Centrahoma, OK 74534 · last Mar 31, first Nov 4
- Tupelo, OK 74572 · last Mar 31, first Nov 4
- Clarita, OK 74535 · last Mar 31, first Nov 4
- Stringtown, OK 74569 · last Apr 5, first Nov 1
- Atoka, OK 74525 · last Apr 5, first Nov 1
- Wardville, OK 74576 · last Mar 31, first Nov 4
- Wapanucka, OK 73461 · last Mar 31, first Nov 4
Frequently asked questions
- When is the last frost in Coalgate, OK?
- For ZIP code 74538, the average last spring frost (32°F) is March 31, based on NOAA 1991-2020 climate normals for the Centrahoma 2 Ese, OK weather station. There is a 1-in-10 chance of a frost after April 18.
- When is the first frost in Coalgate, OK?
- The average first fall frost (32°F) is November 4. There is a 1-in-10 chance of frost by October 22, so tender plants are at risk from that point on.
- How long is the growing season in 74538?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 219 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.