Frost dates for 74368Twin Oaks, OK
The average last spring frost in Twin Oaks is March 31 and the average first fall frost is November 2, giving a typical growing season of about 216 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 31
- Average first fall frost
- Nov 2
- Growing season
- 216 days
Safer after Apr 18 (1-in-10 risk)
Possible by Oct 20 (1-in-10 risk)
First frost typically in 7 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 27 · Apr 13 · Apr 30 | Oct 10 · Oct 25 · Nov 6 | 193 days | 100% |
| Frost / freeze (32°F) | Mar 13 · Mar 31 · Apr 18 | Oct 20 · Nov 2 · Nov 19 | 216 days | 100% |
| Hard freeze (28°F) | Feb 28 · Mar 19 · Apr 4 | Oct 28 · Nov 12 · Dec 1 | 238 days | 100% |
Planting calendar for Twin Oaks
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 13 |
| 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 23 |
| Summer squash | Sow outdoors | Apr 16 – May 31 |
| Winter squash & pumpkins | Sow outdoors | Apr 30 – May 31 |
| Snap beans | Sow outdoors | Apr 16 – Aug 15 |
| Sweet corn | Sow outdoors | Apr 16 – Jul 13 |
| 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 3 – Jul 13 |
| Broccoli | Transplant outdoors (fall) | Aug 2 – Aug 13 |
| Cabbage | Start seeds indoors (spring) | Jan 31 – Feb 28 |
| Cabbage | Transplant outdoors (spring) | Feb 28 – Mar 31 |
| Cabbage | Start seeds indoors (fall) | Jun 23 – Jul 23 |
| Cabbage | Transplant outdoors (fall) | Jul 23 – Aug 23 |
| Leaf lettuce | Sow outdoors (spring) | Feb 28 – May 16 |
| Leaf lettuce | Sow outdoors (fall) | Jul 23 – Sep 8 |
| Spinach | Sow outdoors (spring) | Feb 21 – Apr 6 |
| Spinach | Sow outdoors (fall) | Aug 9 – Sep 13 |
| Radishes | Sow outdoors (spring) | Feb 28 – Apr 20 |
| Radishes | Sow outdoors (fall) | Jul 23 – Sep 23 |
| Kale | Sow outdoors (spring) | Mar 17 – Apr 6 |
| Kale | Sow outdoors (fall) | Jul 16 – Aug 23 |
| Carrots | Sow outdoors (spring) | Mar 31 – May 16 |
| Carrots | Sow outdoors (fall) | Jun 23 – Aug 8 |
| Garlic | Plant outdoors (fall) | Oct 23 – Nov 23 |
Where these dates come from
ZIP code 74368 is matched to the NOAA station Kansas 2 Ne, OK, 6.6 km away, at 1,190 ft elevation (58 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Kansas 2 Ne, OK (used) | 1,190 ft | Mar 31 | Nov 2 |
| Upper Spavinaw Port, OK | 795 ft | Apr 16 | Oct 20 |
| Spavinaw, OK | 685 ft | Apr 7 | Nov 2 |
| Tahlequah, OK | 850 ft | Apr 4 | Oct 31 |
Frost dates near Twin Oaks
- Kansas, OK 74347 · last Mar 31, first Nov 2
- Oaks, OK 74359 · last Mar 31, first Nov 2
- Rose, OK 74364 · last Mar 31, first Nov 2
- Colcord, OK 74338 · last Mar 31, first Nov 2
- Moodys, OK 74444 · last Apr 4, first Oct 31
- Proctor, OK 74457 · last Apr 4, first Oct 31
- Watts, OK 74964 · last Mar 31, first Nov 2
- Eucha, OK 74342 · last Apr 16, first Oct 20
Frequently asked questions
- When is the last frost in Twin Oaks, OK?
- For ZIP code 74368, the average last spring frost (32°F) is March 31, based on NOAA 1991-2020 climate normals for the Kansas 2 Ne, OK weather station. There is a 1-in-10 chance of a frost after April 18.
- When is the first frost in Twin Oaks, OK?
- The average first fall frost (32°F) is November 2. There is a 1-in-10 chance of frost by October 20, so tender plants are at risk from that point on.
- How long is the growing season in 74368?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 216 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.