Killbuck climate

Killbuck Frost Dates and Growing Season

NOAA 1991-2020 normals for Millersburg, 7.3 km from Killbuck, elevation 819 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Millersburg. 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 May 2 and the first fall freeze around October 14, a growing season of about 164 days.

Median at 36°F
last May 13, first October 3
Median at 32°F
last May 2, first October 14
Median at 28°F
last April 21, first October 26

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 30May 25May 21May 17May 13May 9May 5May 1Apr 27
32°FMay 21May 15May 10May 6May 2Apr 29Apr 26Apr 23Apr 18
28°FMay 10May 3Apr 28Apr 24Apr 21Apr 19Apr 16Apr 11Apr 5
24°FApr 25Apr 18Apr 13Apr 9Apr 6Apr 3Mar 31Mar 29Mar 23
20°FApr 9Apr 3Apr 1Mar 30Mar 25Mar 22Mar 19Mar 15Mar 10
16°FMar 31Mar 27Mar 22Mar 18Mar 15Mar 12Mar 8Mar 4Feb 27

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 22Sep 26Sep 29Oct 1Oct 3Oct 5Oct 8Oct 12Oct 16
32°FOct 1Oct 4Oct 7Oct 11Oct 14Oct 16Oct 19Oct 22Oct 27
28°FOct 11Oct 16Oct 20Oct 23Oct 26Oct 29Nov 1Nov 3Nov 7
24°FOct 21Oct 28Nov 1Nov 3Nov 5Nov 9Nov 12Nov 16Nov 22
20°FNov 3Nov 7Nov 11Nov 14Nov 18Nov 22Nov 26Nov 30Dec 6
16°FNov 12Nov 19Nov 24Nov 27Nov 30Dec 3Dec 8Dec 15Dec 22

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°F164156151146142138133128120
32°F184177172168164160155149141
28°F209202196191187182178172165
24°F235227222218214210204198187
20°F259251245241237233228223215
16°F287277271266262256250244235

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
6,046
Cooling degree days, base 65°F
664
Growing degree days, base 40°F
5,084
Growing degree days, base 45°F
3,913
Growing degree days, base 50°F
2,884
Growing degree days, base 55°F
1,998
Growing degree days, base 60°F
1,253

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,18603
February1,00703
March840026
April4774105
May21342311
June41140549
July6223682
August13179631
September11366407
October4108139
November719025
December1,02104

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 7.3 km from Killbuck. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

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Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00335297 (Millersburg). Public domain.