Frost dates for 74039Kellyville, OK
The average last spring frost in Kellyville is April 9 and the average first fall frost is October 25, giving a typical growing season of about 196 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 9
- Average first fall frost
- Oct 25
- Growing season
- 196 days
Safer after Apr 27 (1-in-10 risk)
Possible by Oct 10 (1-in-10 risk)
Last frost typically in 157 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) | Apr 6 · Apr 22 · May 6 | Oct 1 · Oct 15 · Oct 30 | 175 days | 100% |
| Frost / freeze (32°F) | Mar 24 · Apr 9 · Apr 27 | Oct 10 · Oct 25 · Nov 8 | 196 days | 100% |
| Hard freeze (28°F) | Mar 9 · Mar 28 · Apr 16 | Oct 20 · Nov 2 · Nov 18 | 218 days | 100% |
Planting calendar for Kellyville
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 | Mar 9 – May 15 |
| Tomatoes | Transplant outdoors | Apr 25 – Jul 5 |
| Peppers | Start seeds indoors | Mar 9 – Apr 9 |
| Peppers | Transplant outdoors | May 9 – Jun 9 |
| Eggplant | Start seeds indoors | Mar 26 – Apr 24 |
| Eggplant | Transplant outdoors | May 9 – Jun 9 |
| Cucumbers | Sow outdoors | May 9 – Jul 15 |
| Summer squash | Sow outdoors | Apr 25 – Jun 9 |
| Winter squash & pumpkins | Sow outdoors | May 9 – Jun 9 |
| Snap beans | Sow outdoors | Apr 25 – Aug 7 |
| Sweet corn | Sow outdoors | Apr 25 – Jul 5 |
| Watermelon & cantaloupe | Sow outdoors | May 9 – Jun 9 |
| Okra | Sow outdoors | May 2 – May 25 |
| Peas | Sow outdoors (spring) | Mar 9 – Apr 24 |
| Potatoes | Plant outdoors (spring) | Mar 9 – May 9 |
| Onions | Start seeds indoors (spring) | Jan 26 – Feb 22 |
| Onions | Transplant outdoors (spring) | Mar 26 – Apr 24 |
| Broccoli | Start seeds indoors (spring) | Feb 19 – Mar 25 |
| Broccoli | Transplant outdoors (spring) | Mar 26 – Apr 24 |
| Broccoli | Start seeds indoors (fall) | Jun 25 – Jul 5 |
| Broccoli | Transplant outdoors (fall) | Jul 25 – Aug 5 |
| Cabbage | Start seeds indoors (spring) | Feb 9 – Mar 9 |
| Cabbage | Transplant outdoors (spring) | Mar 9 – Apr 9 |
| Cabbage | Start seeds indoors (fall) | Jun 15 – Jul 15 |
| Cabbage | Transplant outdoors (fall) | Jul 15 – Aug 15 |
| Leaf lettuce | Sow outdoors (spring) | Mar 9 – May 25 |
| Leaf lettuce | Sow outdoors (fall) | Jul 15 – Aug 31 |
| Spinach | Sow outdoors (spring) | Mar 2 – Apr 15 |
| Spinach | Sow outdoors (fall) | Aug 1 – Sep 5 |
| Radishes | Sow outdoors (spring) | Mar 9 – Apr 29 |
| Radishes | Sow outdoors (fall) | Jul 15 – Sep 15 |
| Kale | Sow outdoors (spring) | Mar 26 – Apr 15 |
| Kale | Sow outdoors (fall) | Jul 8 – Aug 15 |
| Carrots | Sow outdoors (spring) | Apr 9 – May 25 |
| Carrots | Sow outdoors (fall) | Jun 15 – Jul 31 |
| Garlic | Plant outdoors (fall) | Oct 15 – Nov 15 |
Where these dates come from
ZIP code 74039 is matched to the NOAA station Bristow, OK, 18.5 km away, at 830 ft elevation (125 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bristow, OK (used) | 830 ft | Apr 9 | Oct 25 |
| Tulsa R L Jones Jr Ap, OK | 638 ft | Mar 30 | Nov 4 |
| Bixby, OK | 605 ft | Apr 1 | Nov 1 |
| Mannford 6 Nw, OK | 830 ft | Apr 6 | Oct 29 |
Frost dates near Kellyville
- Mounds, OK 74047 · last Mar 30, first Nov 4
- Sapulpa, OK 74066 · last Mar 30, first Nov 4
- Kiefer, OK 74041 · last Mar 30, first Nov 4
- Slick, OK 74071 · last Apr 9, first Oct 25
- Bristow, OK 74010 · last Apr 9, first Oct 25
- Glenpool, OK 74033 · last Mar 30, first Nov 4
- Tulsa, OK 74131 · last Mar 30, first Nov 4
- Oakhurst, OK 74050 · last Mar 30, first Nov 4
Frequently asked questions
- When is the last frost in Kellyville, OK?
- For ZIP code 74039, the average last spring frost (32°F) is April 9, based on NOAA 1991-2020 climate normals for the Bristow, OK weather station. There is a 1-in-10 chance of a frost after April 27.
- When is the first frost in Kellyville, OK?
- The average first fall frost (32°F) is October 25. There is a 1-in-10 chance of frost by October 10, so tender plants are at risk from that point on.
- How long is the growing season in 74039?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 196 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.