Frost dates for 44839Huron, OH
The average last spring frost in Huron is April 25 and the average first fall frost is October 25, giving a typical growing season of about 183 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 25
- Average first fall frost
- Oct 25
- Growing season
- 183 days
Safer after May 9 (1-in-10 risk)
Possible by Oct 11 (1-in-10 risk)
Last frost typically in 175 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 21 · May 4 · May 20 | Sep 30 · Oct 13 · Oct 27 | 160 days | 100% |
| Frost / freeze (32°F) | Apr 11 · Apr 25 · May 9 | Oct 11 · Oct 25 · Nov 7 | 183 days | 100% |
| Hard freeze (28°F) | Mar 31 · Apr 12 · Apr 28 | Oct 22 · Nov 5 · Nov 20 | 206 days | 100% |
Planting calendar for Huron
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 25 – May 31 |
| Tomatoes | Transplant outdoors | May 11 – Jul 5 |
| Peppers | Start seeds indoors | Mar 25 – Apr 25 |
| Peppers | Transplant outdoors | May 25 – Jun 25 |
| Eggplant | Start seeds indoors | Apr 11 – May 10 |
| Eggplant | Transplant outdoors | May 25 – Jun 25 |
| Cucumbers | Sow outdoors | May 25 – Jul 15 |
| Summer squash | Sow outdoors | May 11 – Jun 25 |
| Winter squash & pumpkins | Sow outdoors | May 25 – Jun 25 |
| Snap beans | Sow outdoors | May 11 – Aug 7 |
| Sweet corn | Sow outdoors | May 11 – Jul 5 |
| Watermelon & cantaloupe | Sow outdoors | May 25 – Jun 25 |
| Okra | Sow outdoors | May 18 – Jun 10 |
| Peas | Sow outdoors (spring) | Mar 25 – May 10 |
| Potatoes | Plant outdoors (spring) | Mar 25 – May 25 |
| Onions | Start seeds indoors (spring) | Feb 11 – Mar 10 |
| Onions | Transplant outdoors (spring) | Apr 11 – May 10 |
| Broccoli | Start seeds indoors (spring) | Mar 7 – Apr 10 |
| Broccoli | Transplant outdoors (spring) | Apr 11 – May 10 |
| Broccoli | Start seeds indoors (fall) | Jun 25 – Jul 5 |
| Broccoli | Transplant outdoors (fall) | Jul 25 – Aug 5 |
| Cabbage | Start seeds indoors (spring) | Feb 25 – Mar 25 |
| Cabbage | Transplant outdoors (spring) | Mar 25 – Apr 25 |
| Cabbage | Start seeds indoors (fall) | Jun 15 – Jul 15 |
| Cabbage | Transplant outdoors (fall) | Jul 15 – Aug 15 |
| Leaf lettuce | Sow outdoors (spring) | Mar 25 – Jun 10 |
| Leaf lettuce | Sow outdoors (fall) | Jul 15 – Aug 31 |
| Spinach | Sow outdoors (spring) | Mar 18 – May 1 |
| Spinach | Sow outdoors (fall) | Aug 1 – Sep 5 |
| Radishes | Sow outdoors (spring) | Mar 25 – May 15 |
| Radishes | Sow outdoors (fall) | Jul 15 – Sep 15 |
| Kale | Sow outdoors (spring) | Apr 11 – May 1 |
| Kale | Sow outdoors (fall) | Jul 8 – Aug 15 |
| Carrots | Sow outdoors (spring) | Apr 25 – Jun 10 |
| Carrots | Sow outdoors (fall) | Jun 15 – Jul 31 |
| Garlic | Plant outdoors (fall) | Oct 15 – Nov 15 |
Where these dates come from
ZIP code 44839 is matched to the NOAA station Norwalk Wwtp, OH, 13.8 km away, at 670 ft elevation (76 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Norwalk Wwtp, OH (used) | 670 ft | Apr 25 | Oct 25 |
| Sandusky, OH | 584 ft | Apr 10 | Nov 5 |
| Oberlin, OH | 816 ft | Apr 27 | Oct 22 |
| Elyria Lorain Co Ap, OH | 794 ft | Apr 24 | Oct 24 |
Frost dates near Huron
- Berlin Heights, OH 44814 · last Apr 25, first Oct 25
- Milan, OH 44846 · last Apr 25, first Oct 25
- Collins, OH 44826 · last Apr 25, first Oct 25
- Sandusky, OH 44870 · last Apr 10, first Nov 5
- Vermilion, OH 44089 · last Apr 24, first Oct 24
- Birmingham, OH 44816 · last Apr 27, first Oct 22
- Norwalk, OH 44857 · last Apr 25, first Oct 25
- Wakeman, OH 44889 · last Apr 27, first Oct 22
Frequently asked questions
- When is the last frost in Huron, OH?
- For ZIP code 44839, the average last spring frost (32°F) is April 25, based on NOAA 1991-2020 climate normals for the Norwalk Wwtp, OH weather station. There is a 1-in-10 chance of a frost after May 9.
- When is the first frost in Huron, OH?
- The average first fall frost (32°F) is October 25. There is a 1-in-10 chance of frost by October 11, so tender plants are at risk from that point on.
- How long is the growing season in 44839?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 183 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.