Frost Dates for Inver Grove Heights, MN
In Inver Grove Heights, MN, the average last spring frost is around Apr 24 and the average first fall frost around Oct 16, for a growing season of about 174 days. For frost-tender plants, wait until May 10, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the St Paul Downtown Airport, MN weather station, 7 miles away, elevation 700 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 10 | Oct 2 |
| 20% | May 4 | Oct 6 |
| 30% | Apr 30 | Oct 10 |
| 40% | Apr 27 | Oct 13 |
| 50% | Apr 24 | Oct 16 |
| 60% | Apr 21 | Oct 19 |
| 70% | Apr 18 | Oct 22 |
| 80% | Apr 15 | Oct 25 |
| 90% | Apr 9 | Oct 29 |
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 4 | Oct 5 |
| Frost / freeze (32°F) | Apr 24 | Oct 16 |
| Hard freeze (28°F) | Apr 13 | Oct 27 |
Planting calendar for Inver Grove Heights
Transplant May 1 – May 15
Transplant May 8 – May 22
Transplant May 8 – May 22
Transplant May 1 – May 15
Sow or transplant May 1 – May 15
Sow or transplant May 1 – May 15
Sow or transplant May 8 – May 22
Sow or transplant Mar 27 – Apr 10
Fall sowing Aug 21 – Sep 18
Fall sowing Aug 21 – Sep 11
Fall sowing Aug 7 – Aug 21
Sow or transplant Mar 27 – Apr 10
Fall sowing Aug 7 – Sep 4
Transplant Apr 10 – Apr 24
Fall sowing Jul 24 – Aug 7
Transplant Apr 3 – Apr 17
Fall sowing Jul 24 – Aug 7
Fall sowing Jul 24 – Aug 7
Fall sowing Sep 4 – Sep 25
Fall sowing Aug 7 – Aug 21
Plant Mar 27 – Apr 10
Based on the average last frost (Apr 24) and first frost (Oct 16). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.