Frost dates for 74647Newkirk, OK
The average last spring frost in Newkirk is April 16 and the average first fall frost is October 26, giving a typical growing season of about 192 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 16
- Average first fall frost
- Oct 26
- Growing season
- 192 days
Safer after Apr 30 (1-in-10 risk)
Possible by Oct 11 (1-in-10 risk)
First frost typically in 1 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 12 · Apr 26 · May 7 | Oct 1 · Oct 17 · Oct 29 | 174 days | 100% |
| Frost / freeze (32°F) | Mar 31 · Apr 16 · Apr 30 | Oct 11 · Oct 26 · Nov 8 | 192 days | 100% |
| Hard freeze (28°F) | Mar 20 · Apr 5 · Apr 21 | Oct 20 · Nov 3 · Nov 19 | 211 days | 100% |
Planting calendar for Newkirk
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 16 – May 22 |
| Tomatoes | Transplant outdoors | May 2 – Jul 6 |
| Peppers | Start seeds indoors | Mar 16 – Apr 16 |
| Peppers | Transplant outdoors | May 16 – Jun 16 |
| Eggplant | Start seeds indoors | Apr 2 – May 1 |
| Eggplant | Transplant outdoors | May 16 – Jun 16 |
| Cucumbers | Sow outdoors | May 16 – Jul 16 |
| Summer squash | Sow outdoors | May 2 – Jun 16 |
| Winter squash & pumpkins | Sow outdoors | May 16 – Jun 16 |
| Snap beans | Sow outdoors | May 2 – Aug 8 |
| Sweet corn | Sow outdoors | May 2 – Jul 6 |
| Watermelon & cantaloupe | Sow outdoors | May 16 – Jun 16 |
| Okra | Sow outdoors | May 9 – Jun 1 |
| Peas | Sow outdoors (spring) | Mar 16 – May 1 |
| Potatoes | Plant outdoors (spring) | Mar 16 – May 16 |
| Onions | Start seeds indoors (spring) | Feb 2 – Mar 1 |
| Onions | Transplant outdoors (spring) | Apr 2 – May 1 |
| Broccoli | Start seeds indoors (spring) | Feb 26 – Apr 1 |
| Broccoli | Transplant outdoors (spring) | Apr 2 – May 1 |
| Broccoli | Start seeds indoors (fall) | Jun 26 – Jul 6 |
| Broccoli | Transplant outdoors (fall) | Jul 26 – Aug 6 |
| Cabbage | Start seeds indoors (spring) | Feb 16 – Mar 16 |
| Cabbage | Transplant outdoors (spring) | Mar 16 – Apr 16 |
| Cabbage | Start seeds indoors (fall) | Jun 16 – Jul 16 |
| Cabbage | Transplant outdoors (fall) | Jul 16 – Aug 16 |
| Leaf lettuce | Sow outdoors (spring) | Mar 16 – Jun 1 |
| Leaf lettuce | Sow outdoors (fall) | Jul 16 – Sep 1 |
| Spinach | Sow outdoors (spring) | Mar 9 – Apr 22 |
| Spinach | Sow outdoors (fall) | Aug 2 – Sep 6 |
| Radishes | Sow outdoors (spring) | Mar 16 – May 6 |
| Radishes | Sow outdoors (fall) | Jul 16 – Sep 16 |
| Kale | Sow outdoors (spring) | Apr 2 – Apr 22 |
| Kale | Sow outdoors (fall) | Jul 9 – Aug 16 |
| Carrots | Sow outdoors (spring) | Apr 16 – Jun 1 |
| Carrots | Sow outdoors (fall) | Jun 16 – Aug 1 |
| Garlic | Plant outdoors (fall) | Oct 16 – Nov 16 |
Where these dates come from
ZIP code 74647 is matched to the NOAA station Newkirk 5Ne, OK, 12.2 km away, at 1,142 ft elevation (36 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Newkirk 5Ne, OK (used) | 1,142 ft | Apr 16 | Oct 26 |
| Ponca City Muni Ap, OK | 1,000 ft | Apr 10 | Oct 27 |
| Newkirk 8E Mesonet, OK | 1,200 ft | Apr 6 | Oct 30 |
| Blackwell 4Sse Mesonet, OK | 997 ft | Apr 8 | Oct 27 |
Frost dates near Newkirk
- Ponca City, OK 74604 · last Apr 10, first Oct 27
- Kaw City, OK 74641 · last Apr 16, first Oct 26
- Blackwell, OK 74631 · last Apr 12, first Oct 29
- Braman, OK 74632 · last Apr 12, first Oct 29
- Arkansas City, KS 67005 · last Apr 11, first Oct 27
- Tonkawa, OK 74653 · last Apr 12, first Oct 29
- Burbank, OK 74633 · last Apr 10, first Oct 27
- Geuda Springs, KS 67051 · last Apr 11, first Oct 27
Frequently asked questions
- When is the last frost in Newkirk, OK?
- For ZIP code 74647, the average last spring frost (32°F) is April 16, based on NOAA 1991-2020 climate normals for the Newkirk 5Ne, OK weather station. There is a 1-in-10 chance of a frost after April 30.
- When is the first frost in Newkirk, OK?
- The average first fall frost (32°F) is October 26. There is a 1-in-10 chance of frost by October 11, so tender plants are at risk from that point on.
- How long is the growing season in 74647?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 192 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.