Frost dates for 73141Oklahoma City, OK
The average last spring frost in Oklahoma City is April 2 and the average first fall frost is November 5, giving a typical growing season of about 217 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 2
- Average first fall frost
- Nov 5
- Growing season
- 217 days
Safer after Apr 18 (1-in-10 risk)
Possible by Oct 20 (1-in-10 risk)
First frost typically in 9 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 12 · Apr 28 | Oct 14 · Oct 28 · Nov 10 | 197 days | 100% |
| Frost / freeze (32°F) | Mar 12 · Apr 2 · Apr 18 | Oct 20 · Nov 5 · Nov 20 | 217 days | 100% |
| Hard freeze (28°F) | Feb 28 · Mar 17 · Apr 6 | Oct 30 · Nov 13 · Dec 1 | 239 days | 100% |
Planting calendar for Oklahoma City
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 2 – May 8 |
| Tomatoes | Transplant outdoors | Apr 18 – Jul 16 |
| Peppers | Start seeds indoors | Mar 2 – Apr 2 |
| Peppers | Transplant outdoors | May 2 – Jun 2 |
| Eggplant | Start seeds indoors | Mar 19 – Apr 17 |
| Eggplant | Transplant outdoors | May 2 – Jun 2 |
| Cucumbers | Sow outdoors | May 2 – Jul 26 |
| Summer squash | Sow outdoors | Apr 18 – Jun 2 |
| Winter squash & pumpkins | Sow outdoors | May 2 – Jun 2 |
| Snap beans | Sow outdoors | Apr 18 – Aug 18 |
| Sweet corn | Sow outdoors | Apr 18 – Jul 16 |
| Watermelon & cantaloupe | Sow outdoors | May 2 – Jun 2 |
| Okra | Sow outdoors | Apr 25 – May 18 |
| Peas | Sow outdoors (spring) | Mar 2 – Apr 17 |
| Potatoes | Plant outdoors (spring) | Mar 2 – May 2 |
| Onions | Start seeds indoors (spring) | Jan 19 – Feb 15 |
| Onions | Transplant outdoors (spring) | Mar 19 – Apr 17 |
| Broccoli | Start seeds indoors (spring) | Feb 12 – Mar 18 |
| Broccoli | Transplant outdoors (spring) | Mar 19 – Apr 17 |
| Broccoli | Start seeds indoors (fall) | Jul 6 – Jul 16 |
| Broccoli | Transplant outdoors (fall) | Aug 5 – Aug 16 |
| Cabbage | Start seeds indoors (spring) | Feb 2 – Mar 2 |
| Cabbage | Transplant outdoors (spring) | Mar 2 – Apr 2 |
| Cabbage | Start seeds indoors (fall) | Jun 26 – Jul 26 |
| Cabbage | Transplant outdoors (fall) | Jul 26 – Aug 26 |
| Leaf lettuce | Sow outdoors (spring) | Mar 2 – May 18 |
| Leaf lettuce | Sow outdoors (fall) | Jul 26 – Sep 11 |
| Spinach | Sow outdoors (spring) | Feb 23 – Apr 8 |
| Spinach | Sow outdoors (fall) | Aug 12 – Sep 16 |
| Radishes | Sow outdoors (spring) | Mar 2 – Apr 22 |
| Radishes | Sow outdoors (fall) | Jul 26 – Sep 26 |
| Kale | Sow outdoors (spring) | Mar 19 – Apr 8 |
| Kale | Sow outdoors (fall) | Jul 19 – Aug 26 |
| Carrots | Sow outdoors (spring) | Apr 2 – May 18 |
| Carrots | Sow outdoors (fall) | Jun 26 – Aug 11 |
| Garlic | Plant outdoors (fall) | Oct 26 – Nov 26 |
Where these dates come from
ZIP code 73141 is matched to the NOAA station Spencer 2Ene Mesonet, OK, 6 km away, at 1,223 ft elevation (16 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Spencer 2Ene Mesonet, OK (used) | 1,223 ft | Apr 2 | Nov 5 |
| Oklahoma City Will Rogers Ap, OK | 1,285 ft | Apr 4 | Nov 2 |
| Oklahoma City Post Ap, OK | 1,297 ft | Apr 2 | Nov 4 |
| Norman 2Nw Mesonet, OK | 1,181 ft | Mar 31 | Nov 5 |
Frost dates near Oklahoma City
- Spencer, OK 73084 · last Apr 2, first Nov 5
- Nicoma Park, OK 73066 · last Apr 2, first Nov 5
- Oklahoma City, OK 73130 · last Apr 2, first Nov 5
- Choctaw, OK 73020 · last Apr 2, first Nov 5
- Jones, OK 73049 · last Apr 2, first Nov 5
- Edmond, OK 73012 · last Apr 2, first Nov 4
- Harrah, OK 73045 · last Apr 4, first Oct 30
- Arcadia, OK 73007 · last Apr 10, first Oct 28
Frequently asked questions
- When is the last frost in Oklahoma City, OK?
- For ZIP code 73141, the average last spring frost (32°F) is April 2, based on NOAA 1991-2020 climate normals for the Spencer 2Ene Mesonet, OK weather station. There is a 1-in-10 chance of a frost after April 18.
- When is the first frost in Oklahoma City, OK?
- The average first fall frost (32°F) is November 5. 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 73141?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 217 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.