Frost Dates for St. Clair Shores, MI
In St. Clair Shores, MI, the average last spring frost is around Apr 29 and the average first fall frost around Oct 22, for a growing season of about 176 days. For frost-tender plants, wait until May 13, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Grosse Pointe Farms, MI weather station, 6 miles away, elevation 613 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 13 | Oct 7 |
| 20% | May 8 | Oct 12 |
| 30% | May 3 | Oct 16 |
| 40% | Apr 30 | Oct 19 |
| 50% | Apr 29 | Oct 22 |
| 60% | Apr 25 | Oct 25 |
| 70% | Apr 22 | Oct 28 |
| 80% | Apr 18 | Oct 31 |
| 90% | Apr 15 | Nov 3 |
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 8 | Oct 10 |
| Frost / freeze (32°F) | Apr 29 | Oct 22 |
| Hard freeze (28°F) | Apr 16 | Nov 1 |
Planting calendar for St. Clair Shores
Transplant May 6 – May 20
Transplant May 13 – May 27
Transplant May 13 – May 27
Transplant May 6 – May 20
Sow or transplant May 6 – May 20
Sow or transplant May 6 – May 20
Sow or transplant May 13 – May 27
Sow or transplant Apr 1 – Apr 15
Fall sowing Aug 27 – Sep 24
Fall sowing Aug 27 – Sep 17
Fall sowing Aug 13 – Aug 27
Sow or transplant Apr 1 – Apr 15
Fall sowing Aug 13 – Sep 10
Transplant Apr 15 – Apr 29
Fall sowing Jul 30 – Aug 13
Transplant Apr 8 – Apr 22
Fall sowing Jul 30 – Aug 13
Fall sowing Jul 30 – Aug 13
Fall sowing Sep 10 – Oct 1
Fall sowing Aug 13 – Aug 27
Plant Apr 1 – Apr 15
Based on the average last frost (Apr 29) and first frost (Oct 22). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.