Checking current alerts… View NWS forecast and alerts.
Will it freeze in Bucyrus in the next 7 nights?
No overnight lows at or below 32°F are forecast in Bucyrus during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 45°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
5 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 45°F Above 36°F · Mostly Cloudy then Chance Light Rain
- Fri, Nov 6 36°F Frost possible · Slight Chance Light Rain then Mostly Cloudy
- Sat, Nov 7 33°F Frost possible · Partly Cloudy
- Sun, Nov 8 34°F Frost possible · Mostly Clear
- Mon, Nov 9 39°F Above 36°F · Mostly Clear
- Tue, Nov 10 35°F Frost possible · Mostly Clear
- Wed, Nov 11 35°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 Bucyrus
The median first fall hard-freeze date (28°F) is November 6, from NOAA’s 1991–2020 Climate Normals at Bucyrus. 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 16 · Apr 30 · May 16 | Oct 2 · Oct 15 · Oct 29 | 168 days |
| 32°F freeze | Apr 5 · Apr 19 · May 6 | Oct 14 · Oct 27 · Nov 10 | 190 days |
| 28°F hard freeze | Mar 23 · Apr 7 · Apr 22 | Oct 26 · Nov 6 · Nov 24 | 214 days |
Average high temperature by month
1991–2020 normals at Bucyrus
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 Bucyrus, OH come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Bucyrus (station USC00331072, elevation 955 ft), 0.5 mi from Bucyrus. 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 Bucyrus
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Galion, OH | 11 mi | Apr 26 | Oct 20 |
| Upper Sandusky, OH | 16 mi | Apr 29 | Oct 17 |
| Marion, OH | 16 mi | Apr 25 | Oct 20 |
| Shelby, OH | 17 mi | Apr 30 | Oct 15 |
| Ontario, OH | 19 mi | Apr 30 | Oct 15 |
| Willard, OH | 21 mi | Apr 25 | Oct 25 |
| Mansfield, OH | 23 mi | Apr 26 | Oct 22 |
| Tiffin, OH | 24 mi | Apr 23 | Oct 23 |
| Bellevue, OH | 33 mi | Apr 25 | Oct 25 |
| Fostoria, OH | 34 mi | Apr 23 | Oct 23 |
Frequently asked questions
When is the last frost in Bucyrus?
On average, the last spring frost (32°F) in Bucyrus is around April 19. In about 1 year in 10 it comes after May 6, and in 9 years in 10 it comes after April 5.
When is the first frost in Bucyrus?
The first fall frost (32°F) usually arrives around October 27. There’s a 10% chance of a freeze by October 14 and a 90% chance by November 10.
Can it frost in Bucyrus 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 April 30.
What growing zone is Bucyrus?
Bucyrus 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 44820. See growing zones in Ohio.
More: all Ohio frost dates · Ohio growing zones · frost vs. freeze