Frost Dates for Oklahoma City, OK
In Oklahoma City, OK, the average last spring frost is around Apr 4 and the average first fall frost around Nov 2, for a growing season of about 213 days. For frost-tender plants, wait until Apr 20, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Oklahoma City Will Rogers Airport, OK weather station, 7 miles away, elevation 1,285 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Apr 20 | Oct 21 |
| 20% | Apr 15 | Oct 26 |
| 30% | Apr 10 | Oct 29 |
| 40% | Apr 7 | Nov 1 |
| 50% | Apr 4 | Nov 2 |
| 60% | Mar 31 | Nov 5 |
| 70% | Mar 28 | Nov 8 |
| 80% | Mar 22 | Nov 12 |
| 90% | Mar 16 | Nov 17 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Apr 15 | Oct 26 |
| Frost / freeze (32°F) | Apr 4 | Nov 2 |
| Hard freeze (28°F) | Mar 21 | Nov 11 |
Planting calendar for Oklahoma City
Transplant Apr 11 – Apr 25
Transplant Apr 18 – May 2
Transplant Apr 18 – May 2
Transplant Apr 11 – Apr 25
Sow or transplant Apr 11 – Apr 25
Sow or transplant Apr 11 – Apr 25
Sow or transplant Apr 18 – May 2
Sow or transplant Mar 7 – Mar 21
Fall sowing Sep 7 – Oct 5
Fall sowing Sep 7 – Sep 28
Fall sowing Aug 24 – Sep 7
Sow or transplant Mar 7 – Mar 21
Fall sowing Aug 24 – Sep 21
Transplant Mar 21 – Apr 4
Fall sowing Aug 10 – Aug 24
Transplant Mar 14 – Mar 28
Fall sowing Aug 10 – Aug 24
Fall sowing Aug 10 – Aug 24
Fall sowing Sep 21 – Oct 12
Fall sowing Aug 24 – Sep 7
Plant Mar 7 – Mar 21
Based on the average last frost (Apr 4) and first frost (Nov 2). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.