Frost dates for 73450Milburn, OK
The average last spring frost in Milburn is March 27 and the average first fall frost is November 8, giving a typical growing season of about 227 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 27
- Average first fall frost
- Nov 8
- Growing season
- 227 days
Safer after Apr 14 (1-in-10 risk)
Possible by Oct 25 (1-in-10 risk)
First frost typically in 12 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 21 · Apr 8 · Apr 24 | Oct 17 · Oct 31 · Nov 13 | 205 days | 100% |
| Frost / freeze (32°F) | Mar 7 · Mar 27 · Apr 14 | Oct 25 · Nov 8 · Nov 25 | 227 days | 100% |
| Hard freeze (28°F) | Feb 24 · Mar 11 · Mar 30 | Nov 2 · Nov 19 · Dec 7 | 253 days | 100% |
Planting calendar for Milburn
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 24 – May 2 |
| Tomatoes | Transplant outdoors | Apr 12 – Jul 19 |
| Peppers | Start seeds indoors | Feb 24 – Mar 27 |
| Peppers | Transplant outdoors | Apr 26 – May 27 |
| Eggplant | Start seeds indoors | Mar 13 – Apr 11 |
| Eggplant | Transplant outdoors | Apr 26 – May 27 |
| Cucumbers | Sow outdoors | Apr 26 – Jul 29 |
| Summer squash | Sow outdoors | Apr 12 – May 27 |
| Winter squash & pumpkins | Sow outdoors | Apr 26 – May 27 |
| Snap beans | Sow outdoors | Apr 12 – Aug 21 |
| Sweet corn | Sow outdoors | Apr 12 – Jul 19 |
| Watermelon & cantaloupe | Sow outdoors | Apr 26 – May 27 |
| Okra | Sow outdoors | Apr 19 – May 12 |
| Peas | Sow outdoors (spring) | Feb 24 – Apr 11 |
| Potatoes | Plant outdoors (spring) | Feb 24 – Apr 26 |
| Onions | Start seeds indoors (spring) | Jan 13 – Feb 9 |
| Onions | Transplant outdoors (spring) | Mar 13 – Apr 11 |
| Broccoli | Start seeds indoors (spring) | Feb 6 – Mar 12 |
| Broccoli | Transplant outdoors (spring) | Mar 13 – Apr 11 |
| Broccoli | Start seeds indoors (fall) | Jul 9 – Jul 19 |
| Broccoli | Transplant outdoors (fall) | Aug 8 – Aug 19 |
| Cabbage | Start seeds indoors (spring) | Jan 27 – Feb 24 |
| Cabbage | Transplant outdoors (spring) | Feb 24 – Mar 27 |
| Cabbage | Start seeds indoors (fall) | Jun 29 – Jul 29 |
| Cabbage | Transplant outdoors (fall) | Jul 29 – Aug 29 |
| Leaf lettuce | Sow outdoors (spring) | Feb 24 – May 12 |
| Leaf lettuce | Sow outdoors (fall) | Jul 29 – Sep 14 |
| Spinach | Sow outdoors (spring) | Feb 17 – Apr 2 |
| Spinach | Sow outdoors (fall) | Aug 15 – Sep 19 |
| Radishes | Sow outdoors (spring) | Feb 24 – Apr 16 |
| Radishes | Sow outdoors (fall) | Jul 29 – Sep 29 |
| Kale | Sow outdoors (spring) | Mar 13 – Apr 2 |
| Kale | Sow outdoors (fall) | Jul 22 – Aug 29 |
| Carrots | Sow outdoors (spring) | Mar 27 – May 12 |
| Carrots | Sow outdoors (fall) | Jun 29 – Aug 14 |
| Garlic | Plant outdoors (fall) | Oct 29 – Nov 29 |
Where these dates come from
ZIP code 73450 is matched to the NOAA station Madill, OK, 23.9 km away, at 770 ft elevation (37 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Madill, OK (used) | 770 ft | Mar 27 | Nov 8 |
| Coleman 4W, OK | 747 ft | Mar 31 | Nov 5 |
| Tishomingo 6N Mesonet, OK | 879 ft | Mar 29 | Nov 5 |
| Durant, OK | 600 ft | Mar 31 | Nov 5 |
Frost dates near Milburn
- Coleman, OK 73432 · last Mar 31, first Nov 5
- Tishomingo, OK 73460 · last Mar 27, first Nov 8
- Kenefic, OK 74748 · last Mar 31, first Nov 5
- Ravia, OK 73455 · last Mar 27, first Nov 8
- Mead, OK 73449 · last Mar 31, first Nov 5
- Wapanucka, OK 73461 · last Mar 31, first Nov 4
- Madill, OK 73446 · last Mar 27, first Nov 8
- Durant, OK 74701 · last Mar 31, first Nov 5
Frequently asked questions
- When is the last frost in Milburn, OK?
- For ZIP code 73450, the average last spring frost (32°F) is March 27, based on NOAA 1991-2020 climate normals for the Madill, OK weather station. There is a 1-in-10 chance of a frost after April 14.
- When is the first frost in Milburn, OK?
- The average first fall frost (32°F) is November 8. There is a 1-in-10 chance of frost by October 25, so tender plants are at risk from that point on.
- How long is the growing season in 73450?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 227 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.