Frost Dates for Gary, IN
In Gary, IN, the average last spring frost is around Apr 22 and the average first fall frost around Oct 27, for a growing season of about 188 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 Indiana Dunes Nl, IN weather station, 14 miles away, elevation 680 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 15 |
| 20% | May 2 | Oct 20 |
| 30% | Apr 29 | Oct 22 |
| 40% | Apr 25 | Oct 25 |
| 50% | Apr 22 | Oct 27 |
| 60% | Apr 19 | Oct 30 |
| 70% | Apr 16 | Nov 1 |
| 80% | Apr 12 | Nov 4 |
| 90% | Apr 7 | Nov 9 |
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 16 |
| Frost / freeze (32°F) | Apr 22 | Oct 27 |
| Hard freeze (28°F) | Apr 8 | Nov 7 |
Planting calendar for Gary
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 Sep 1 – Sep 29
Fall sowing Sep 1 – Sep 22
Fall sowing Aug 18 – Sep 1
Sow or transplant Mar 25 – Apr 8
Fall sowing Aug 18 – Sep 15
Transplant Apr 8 – Apr 22
Fall sowing Aug 4 – Aug 18
Transplant Apr 1 – Apr 15
Fall sowing Aug 4 – Aug 18
Fall sowing Aug 4 – Aug 18
Fall sowing Sep 15 – Oct 6
Fall sowing Aug 18 – Sep 1
Plant Mar 25 – Apr 8
Based on the average last frost (Apr 22) and first frost (Oct 27). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.