Frost dates for 43452Port Clinton, OH
The average last spring frost in Port Clinton is April 10 and the average first fall frost is November 5, giving a typical growing season of about 209 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 10
- Average first fall frost
- Nov 5
- Growing season
- 209 days
Safer after Apr 23 (1-in-10 risk)
Possible by Oct 23 (1-in-10 risk)
First frost typically in 4 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 8 · Apr 21 · May 5 | Oct 12 · Oct 26 · Nov 9 | 186 days | 100% |
| Frost / freeze (32°F) | Mar 31 · Apr 10 · Apr 23 | Oct 23 · Nov 5 · Nov 20 | 209 days | 100% |
| Hard freeze (28°F) | Mar 16 · Apr 1 · Apr 14 | Nov 3 · Nov 16 · Dec 2 | 230 days | 100% |
Planting calendar for Port Clinton
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 10 – May 16 |
| Tomatoes | Transplant outdoors | Apr 26 – Jul 16 |
| Peppers | Start seeds indoors | Mar 10 – Apr 10 |
| Peppers | Transplant outdoors | May 10 – Jun 10 |
| Eggplant | Start seeds indoors | Mar 27 – Apr 25 |
| Eggplant | Transplant outdoors | May 10 – Jun 10 |
| Cucumbers | Sow outdoors | May 10 – Jul 26 |
| Summer squash | Sow outdoors | Apr 26 – Jun 10 |
| Winter squash & pumpkins | Sow outdoors | May 10 – Jun 10 |
| Snap beans | Sow outdoors | Apr 26 – Aug 18 |
| Sweet corn | Sow outdoors | Apr 26 – Jul 16 |
| Watermelon & cantaloupe | Sow outdoors | May 10 – Jun 10 |
| Okra | Sow outdoors | May 3 – May 26 |
| Peas | Sow outdoors (spring) | Mar 10 – Apr 25 |
| Potatoes | Plant outdoors (spring) | Mar 10 – May 10 |
| Onions | Start seeds indoors (spring) | Jan 27 – Feb 23 |
| Onions | Transplant outdoors (spring) | Mar 27 – Apr 25 |
| Broccoli | Start seeds indoors (spring) | Feb 20 – Mar 26 |
| Broccoli | Transplant outdoors (spring) | Mar 27 – Apr 25 |
| Broccoli | Start seeds indoors (fall) | Jul 6 – Jul 16 |
| Broccoli | Transplant outdoors (fall) | Aug 5 – Aug 16 |
| Cabbage | Start seeds indoors (spring) | Feb 10 – Mar 10 |
| Cabbage | Transplant outdoors (spring) | Mar 10 – Apr 10 |
| Cabbage | Start seeds indoors (fall) | Jun 26 – Jul 26 |
| Cabbage | Transplant outdoors (fall) | Jul 26 – Aug 26 |
| Leaf lettuce | Sow outdoors (spring) | Mar 10 – May 26 |
| Leaf lettuce | Sow outdoors (fall) | Jul 26 – Sep 11 |
| Spinach | Sow outdoors (spring) | Mar 3 – Apr 16 |
| Spinach | Sow outdoors (fall) | Aug 12 – Sep 16 |
| Radishes | Sow outdoors (spring) | Mar 10 – Apr 30 |
| Radishes | Sow outdoors (fall) | Jul 26 – Sep 26 |
| Kale | Sow outdoors (spring) | Mar 27 – Apr 16 |
| Kale | Sow outdoors (fall) | Jul 19 – Aug 26 |
| Carrots | Sow outdoors (spring) | Apr 10 – May 26 |
| Carrots | Sow outdoors (fall) | Jun 26 – Aug 11 |
| Garlic | Plant outdoors (fall) | Oct 26 – Nov 26 |
Where these dates come from
ZIP code 43452 is matched to the NOAA station Sandusky, OH, 19.7 km away, at 584 ft elevation (7 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Sandusky, OH (used) | 584 ft | Apr 10 | Nov 5 |
| Fremont, OH | 600 ft | Apr 26 | Oct 23 |
| Fremont Ag Stn, OH | 664 ft | Apr 21 | Oct 24 |
| Norwalk Wwtp, OH | 670 ft | Apr 25 | Oct 25 |
Frost dates near Port Clinton
- Gypsum, OH 43433 · last Apr 10, first Nov 5
- Lacarne, OH 43439 · last Apr 26, first Oct 23
- Lakeside Marblehead, OH 43440 · last Apr 10, first Nov 5
- Vickery, OH 43464 · last Apr 10, first Nov 5
- Oak Harbor, OH 43449 · last Apr 26, first Oct 23
- Castalia, OH 44824 · last Apr 10, first Nov 5
- Put In Bay, OH 43456 · last Apr 10, first Nov 5
- Sandusky, OH 44871 · last Apr 10, first Nov 5
Frequently asked questions
- When is the last frost in Port Clinton, OH?
- For ZIP code 43452, the average last spring frost (32°F) is April 10, based on NOAA 1991-2020 climate normals for the Sandusky, OH weather station. There is a 1-in-10 chance of a frost after April 23.
- When is the first frost in Port Clinton, OH?
- The average first fall frost (32°F) is November 5. There is a 1-in-10 chance of frost by October 23, so tender plants are at risk from that point on.
- How long is the growing season in 43452?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 209 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.