Perrysburg climate

Perrysburg Frost Dates and Growing Season

NOAA 1991-2020 normals for Toledo Express AP, 14.9 km from Perrysburg, elevation 669 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Toledo Express AP. A median date has an even chance of a later freeze in spring, or an earlier one in fall.

The last spring freeze typically comes around April 22 and the first fall freeze around October 24, a growing season of about 188 days.

Median at 36°F
last May 1, first October 13
Median at 32°F
last April 22, first October 24
Median at 28°F
last April 8, first November 4

Last freeze in spring

The chance of a later freeze than the date shown. At 10 percent, one spring in ten still freezes after the date; planting after the 10 percent date for 32°F is the cautious choice.

Threshold10%20%30%40%50%60%70%80%90%
36°FMay 16May 11May 7May 4May 1Apr 30Apr 26Apr 22Apr 17
32°FMay 7May 3Apr 29Apr 25Apr 22Apr 18Apr 15Apr 11Apr 6
28°FApr 25Apr 19Apr 15Apr 12Apr 8Apr 5Apr 3Mar 31Mar 26
24°FApr 13Apr 6Apr 3Apr 1Mar 30Mar 27Mar 23Mar 19Mar 15
20°FApr 3Mar 30Mar 27Mar 23Mar 19Mar 17Mar 14Mar 9Mar 4
16°FMar 28Mar 22Mar 17Mar 14Mar 11Mar 7Mar 4Feb 27Feb 20

First freeze in fall

The chance of an earlier freeze than the date shown. At 10 percent, one fall in ten freezes before the date.

Threshold10%20%30%40%50%60%70%80%90%
36°FSep 30Oct 3Oct 6Oct 10Oct 13Oct 15Oct 18Oct 21Oct 26
32°FOct 11Oct 16Oct 20Oct 22Oct 24Oct 27Oct 30Nov 2Nov 8
28°FOct 23Oct 28Oct 31Nov 2Nov 4Nov 7Nov 11Nov 15Nov 20
24°FNov 3Nov 7Nov 10Nov 13Nov 16Nov 19Nov 23Nov 27Dec 2
20°FNov 11Nov 16Nov 21Nov 25Nov 28Dec 1Dec 4Dec 9Dec 16
16°FNov 21Nov 28Dec 1Dec 4Dec 8Dec 12Dec 16Dec 20Dec 27

Growing season length

Days between the last spring and first fall freeze at each threshold, with the chance of a season at least that long.

Threshold10%20%30%40%50%60%70%80%90%
36°F183177172168164160156150143
32°F206200196192188184179174168
28°F230223218214210207202197191
24°F255246241237232228224219213
20°F278269262257253248244237230
16°F296288283277272268262257249

How often it gets that cold

The share of years with at least one night at or below each temperature.

36°F or colder
100% of years
32°F or colder
100% of years
28°F or colder
100% of years
24°F or colder
100% of years
20°F or colder
100% of years
16°F or colder
100% of years

Degree days

A degree day is one degree of the daily mean temperature beyond a base, for one day. Heating degree days count cold (the fuel a house burns), cooling degree days heat, growing degree days the warmth a crop needs; each crop has its own base.

Heating degree days, base 65°F
5,641
Cooling degree days, base 65°F
1,019
Growing degree days, base 40°F
5,717
Growing degree days, base 45°F
4,506
Growing degree days, base 50°F
3,434
Growing degree days, base 55°F
2,497
Growing degree days, base 60°F
1,693

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,16203
February98103
March803130
April43310126
May16070381
June20218648
July1322786
August4266727
September73115493
October33817192
November667140
December1,00006

What this means

NOAA computes these from the daily lows at the station over 1991-2020, fitting the dates of each year's last and first freeze to a distribution, so a date can be stated at any level of risk. 36°F is a frost risk for tender plants on a clear, calm night, since the ground cools below the air above it; 32°F is a freeze; 28°F is a hard freeze that kills most annuals.

The station is 14.9 km from Perrysburg. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USW00094830 (Toledo Express AP). Public domain.