Frost Dates for Oak Creek, WI
In Oak Creek, WI, the average last spring frost is around Apr 22 and the average first fall frost around Oct 26, for a growing season of about 184 days. For frost-tender plants, wait until May 8, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the South Milwaukee Wwtp, WI weather station, 3 miles away, elevation 650 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% | May 8 | Oct 10 |
| 20% | May 1 | Oct 16 |
| 30% | Apr 29 | Oct 20 |
| 40% | Apr 25 | Oct 24 |
| 50% | Apr 22 | Oct 26 |
| 60% | Apr 19 | Oct 28 |
| 70% | Apr 16 | Oct 31 |
| 80% | Apr 13 | Nov 3 |
| 90% | Apr 9 | Nov 8 |
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) | May 5 | Oct 16 |
| Frost / freeze (32°F) | Apr 22 | Oct 26 |
| Hard freeze (28°F) | Apr 9 | Nov 5 |
Planting calendar for Oak Creek
Transplant Apr 29 – May 13
Transplant May 6 – May 20
Transplant May 6 – May 20
Transplant Apr 29 – May 13
Sow or transplant Apr 29 – May 13
Sow or transplant Apr 29 – May 13
Sow or transplant May 6 – May 20
Sow or transplant Mar 25 – Apr 8
Fall sowing Aug 31 – Sep 28
Fall sowing Aug 31 – Sep 21
Fall sowing Aug 17 – Aug 31
Sow or transplant Mar 25 – Apr 8
Fall sowing Aug 17 – Sep 14
Transplant Apr 8 – Apr 22
Fall sowing Aug 3 – Aug 17
Transplant Apr 1 – Apr 15
Fall sowing Aug 3 – Aug 17
Fall sowing Aug 3 – Aug 17
Fall sowing Sep 14 – Oct 5
Fall sowing Aug 17 – Aug 31
Plant Mar 25 – Apr 8
Based on the average last frost (Apr 22) and first frost (Oct 26). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.