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Will it freeze in Cortland in the next 7 nights?
No overnight lows at or below 32°F are forecast in Cortland during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 46°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 46°F Above 36°F · Mostly Cloudy
- Fri, Nov 6 37°F Above 36°F · Light Rain Likely
- Sat, Nov 7 35°F Frost possible · Chance Light Rain then Mostly Cloudy
- Sun, Nov 8 34°F Frost possible · Slight Chance Light Rain
- Mon, Nov 9 37°F Above 36°F · Mostly Clear
- Tue, Nov 10 34°F Frost possible · Mostly Clear
- Wed, Nov 11 34°F Frost possible · Partly Cloudy
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Cortland
The median first fall hard-freeze date (28°F) is November 5, from NOAA’s 1991–2020 Climate Normals at Mosquito Creek Lake. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Apr 26 · May 11 · May 27 | Sep 28 · Oct 10 · Oct 25 | 154 days |
| 32°F freeze | Apr 16 · Apr 30 · May 16 | Oct 7 · Oct 23 · Nov 7 | 176 days |
| 28°F hard freeze | Apr 4 · Apr 18 · May 2 | Oct 23 · Nov 5 · Nov 20 | 201 days |
Average high temperature by month
1991–2020 normals at Mosquito Creek Lake
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Cortland, OH come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Mosquito Creek Lake (station USC00335505, elevation 910 ft), 3.3 mi from Cortland. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Cortland
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Warren, OH | 8.1 mi | May 8 | Oct 12 |
| Niles, OH | 9.9 mi | May 8 | Oct 12 |
| Girard, OH | 12 mi | May 1 | Oct 17 |
| Sharon, PA | 13 mi | May 1 | Oct 17 |
| Hubbard, OH | 14 mi | May 1 | Oct 17 |
| Hermitage, PA | 16 mi | May 15 | Oct 3 |
| Youngstown, OH | 17 mi | May 1 | Oct 17 |
| Greenville, PA | 18 mi | May 4 | Oct 14 |
| Campbell, OH | 19 mi | Apr 30 | Oct 23 |
| Struthers, OH | 21 mi | Apr 30 | Oct 23 |
Frequently asked questions
When is the last frost in Cortland?
On average, the last spring frost (32°F) in Cortland is around April 30. In about 1 year in 10 it comes after May 16, and in 9 years in 10 it comes after April 16.
When is the first frost in Cortland?
The first fall frost (32°F) usually arrives around October 23. There’s a 10% chance of a freeze by October 7 and a 90% chance by November 7.
Can it frost in Cortland after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after May 11.
What growing zone is Cortland?
Cortland is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 44410. See growing zones in Ohio.
More: all Ohio frost dates · Ohio growing zones · frost vs. freeze