Frost Dates for Warren, OH
In Warren, OH, the average last spring frost is around May 8 and the average first fall frost around Oct 12, for a growing season of about 157 days. For frost-tender plants, wait until May 25, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Warren 3 S, OH weather station, 3 miles away, elevation 900 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 25 | Sep 30 |
| 20% | May 19 | Oct 3 |
| 30% | May 15 | Oct 6 |
| 40% | May 11 | Oct 9 |
| 50% | May 8 | Oct 12 |
| 60% | May 5 | Oct 14 |
| 70% | May 1 | Oct 18 |
| 80% | Apr 29 | Oct 22 |
| 90% | Apr 23 | Oct 26 |
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 19 | Oct 2 |
| Frost / freeze (32°F) | May 8 | Oct 12 |
| Hard freeze (28°F) | Apr 27 | Oct 26 |
Planting calendar for Warren
Transplant May 15 – May 29
Transplant May 22 – Jun 5
Transplant May 22 – Jun 5
Transplant May 15 – May 29
Sow or transplant May 15 – May 29
Sow or transplant May 15 – May 29
Sow or transplant May 22 – Jun 5
Sow or transplant Apr 10 – Apr 24
Fall sowing Aug 17 – Sep 14
Fall sowing Aug 17 – Sep 7
Fall sowing Aug 3 – Aug 17
Sow or transplant Apr 10 – Apr 24
Fall sowing Aug 3 – Aug 31
Transplant Apr 24 – May 8
Fall sowing Jul 20 – Aug 3
Transplant Apr 17 – May 1
Fall sowing Jul 20 – Aug 3
Fall sowing Jul 20 – Aug 3
Fall sowing Aug 31 – Sep 21
Fall sowing Aug 3 – Aug 17
Plant Apr 10 – Apr 24
Based on the average last frost (May 8) and first frost (Oct 12). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.