Frost Dates for Shawnee, OK
In Shawnee, OK, the average last spring frost is around Mar 30 and the average first fall frost around Nov 5, for a growing season of about 221 days. For frost-tender plants, wait until Apr 16, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Shawnee 3Nnw Mesonet, OK weather station, under 1 mile away, elevation 1,076 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 16 | Oct 22 |
| 20% | Apr 9 | Oct 27 |
| 30% | Apr 5 | Oct 31 |
| 40% | Apr 2 | Nov 2 |
| 50% | Mar 30 | Nov 5 |
| 60% | Mar 27 | Nov 8 |
| 70% | Mar 22 | Nov 11 |
| 80% | Mar 17 | Nov 15 |
| 90% | Mar 10 | Nov 20 |
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 12 | Oct 28 |
| Frost / freeze (32°F) | Mar 30 | Nov 5 |
| Hard freeze (28°F) | Mar 15 | Nov 14 |
Planting calendar for Shawnee
Transplant Apr 6 – Apr 20
Transplant Apr 13 – Apr 27
Transplant Apr 13 – Apr 27
Transplant Apr 6 – Apr 20
Sow or transplant Apr 6 – Apr 20
Sow or transplant Apr 6 – Apr 20
Sow or transplant Apr 13 – Apr 27
Sow or transplant Mar 2 – Mar 16
Fall sowing Sep 10 – Oct 8
Fall sowing Sep 10 – Oct 1
Fall sowing Aug 27 – Sep 10
Sow or transplant Mar 2 – Mar 16
Fall sowing Aug 27 – Sep 24
Transplant Mar 16 – Mar 30
Fall sowing Aug 13 – Aug 27
Transplant Mar 9 – Mar 23
Fall sowing Aug 13 – Aug 27
Fall sowing Aug 13 – Aug 27
Fall sowing Sep 24 – Oct 15
Fall sowing Aug 27 – Sep 10
Plant Mar 2 – Mar 16
Based on the average last frost (Mar 30) and first frost (Nov 5). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.