Frost Dates for Hammond, IN
In Hammond, IN, the average last spring frost is around Apr 23 and the average first fall frost around Oct 20, for a growing season of about 179 days. For frost-tender plants, wait until May 11, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Park Forest, IL weather station, 13 miles away, elevation 710 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 11 | Oct 6 |
| 20% | May 5 | Oct 12 |
| 30% | Apr 30 | Oct 15 |
| 40% | Apr 27 | Oct 18 |
| 50% | Apr 23 | Oct 20 |
| 60% | Apr 20 | Oct 23 |
| 70% | Apr 18 | Oct 25 |
| 80% | Apr 14 | Oct 28 |
| 90% | Apr 9 | Nov 1 |
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 10 |
| Frost / freeze (32°F) | Apr 23 | Oct 20 |
| Hard freeze (28°F) | Apr 12 | Oct 30 |
Planting calendar for Hammond
Transplant Apr 30 – May 14
Transplant May 7 – May 21
Transplant May 7 – May 21
Transplant Apr 30 – May 14
Sow or transplant Apr 30 – May 14
Sow or transplant Apr 30 – May 14
Sow or transplant May 7 – May 21
Sow or transplant Mar 26 – Apr 9
Fall sowing Aug 25 – Sep 22
Fall sowing Aug 25 – Sep 15
Fall sowing Aug 11 – Aug 25
Sow or transplant Mar 26 – Apr 9
Fall sowing Aug 11 – Sep 8
Transplant Apr 9 – Apr 23
Fall sowing Jul 28 – Aug 11
Transplant Apr 2 – Apr 16
Fall sowing Jul 28 – Aug 11
Fall sowing Jul 28 – Aug 11
Fall sowing Sep 8 – Sep 29
Fall sowing Aug 11 – Aug 25
Plant Mar 26 – Apr 9
Based on the average last frost (Apr 23) and first frost (Oct 20). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.