Millersburg climate

Millersburg Frost Dates and Growing Season

NOAA 1991-2020 normals for Goshen Muni AP, 8.2 km from Millersburg, elevation 827 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Goshen Muni 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 28 and the first fall freeze around October 19, a growing season of about 171 days.

Median at 36°F
last May 7, first October 6
Median at 32°F
last April 28, first October 19
Median at 28°F
last April 17, first October 31

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 21May 17May 13May 10May 7May 4May 1Apr 28Apr 23
32°FMay 13May 8May 3May 1Apr 28Apr 25Apr 22Apr 18Apr 14
28°FMay 2Apr 27Apr 22Apr 19Apr 17Apr 15Apr 11Apr 6Apr 2
24°FApr 20Apr 16Apr 11Apr 7Apr 4Apr 1Mar 30Mar 25Mar 19
20°FApr 8Apr 2Mar 31Mar 27Mar 24Mar 21Mar 17Mar 12Mar 6
16°FMar 30Mar 25Mar 21Mar 17Mar 14Mar 10Mar 6Mar 2Feb 24

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 27Oct 1Oct 3Oct 6Oct 9Oct 11Oct 15Oct 20
32°FOct 4Oct 9Oct 12Oct 16Oct 19Oct 21Oct 24Oct 28Nov 1
28°FOct 16Oct 22Oct 25Oct 28Oct 31Nov 1Nov 4Nov 8Nov 12
24°FNov 1Nov 3Nov 5Nov 9Nov 12Nov 15Nov 18Nov 22Nov 28
20°FNov 6Nov 12Nov 16Nov 19Nov 23Nov 26Nov 30Dec 3Dec 11
16°FNov 15Nov 22Nov 26Nov 29Dec 2Dec 5Dec 11Dec 16Dec 23

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°F170164159155151148143139132
32°F191185180175171168164159152
28°F217209204200195191187181175
24°F244235229224220216211205199
20°F267259252247242238234228220
16°F290279273267263258254248241

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
6,178
Cooling degree days, base 65°F
766
Growing degree days, base 40°F
5,191
Growing degree days, base 45°F
4,038
Growing degree days, base 50°F
3,021
Growing degree days, base 55°F
2,136
Growing degree days, base 60°F
1,382

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,24001
February1,04002
March847228
April4836104
May20355333
June30176595
July5245705
August12191645
September10878423
October40012155
November735028
December1,07604

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 8.2 km from Millersburg. 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 USW00014829 (Goshen Muni AP). Public domain.