Milltown climate

Milltown Frost Dates and Growing Season

NOAA 1991-2020 normals for English, 18.2 km from Milltown, elevation 510 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for English. 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 17 and the first fall freeze around October 19, a growing season of about 184 days.

Median at 36°F
last April 28, first October 10
Median at 32°F
last April 17, first October 19
Median at 28°F
last April 3, 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 14May 8May 5May 1Apr 28Apr 25Apr 21Apr 18Apr 12
32°FMay 4Apr 28Apr 23Apr 20Apr 17Apr 14Apr 10Apr 6Mar 31
28°FApr 18Apr 13Apr 9Apr 5Apr 3Mar 31Mar 28Mar 24Mar 19
24°FApr 7Apr 2Mar 30Mar 26Mar 22Mar 19Mar 15Mar 11Mar 4
20°FMar 29Mar 22Mar 18Mar 15Mar 11Mar 6Mar 2Feb 27Feb 21
16°FMar 18Mar 12Mar 6Mar 2Feb 28Feb 23Feb 18Feb 12Feb 6

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 29Oct 2Oct 5Oct 7Oct 10Oct 12Oct 15Oct 18Oct 21
32°FOct 6Oct 11Oct 14Oct 17Oct 19Oct 22Oct 24Oct 28Oct 31
28°FOct 15Oct 21Oct 24Oct 28Oct 31Nov 2Nov 5Nov 10Nov 16
24°FOct 30Nov 2Nov 5Nov 9Nov 12Nov 15Nov 20Nov 25Dec 2
20°FNov 7Nov 13Nov 17Nov 22Nov 26Nov 30Dec 2Dec 7Dec 14
16°FNov 17Nov 24Nov 30Dec 3Dec 7Dec 12Dec 17Dec 22Dec 28

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°F181176173169165162157153146
32°F205198193189184180176171164
28°F235225220215210206201196186
24°F261252245240235230225220212
20°F286278271266260255250242232
16°F312302295289283277271264254

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
4,436
Cooling degree days, base 65°F
1,302
Growing degree days, base 40°F
6,680
Growing degree days, base 45°F
5,316
Growing degree days, base 50°F
4,097
Growing degree days, base 55°F
3,018
Growing degree days, base 60°F
2,088

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January984011
February784014
March587474
April27824237
May85102484
June7270714
July0365829
August1345809
September41168578
October26522253
November548279
December857017

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 18.2 km from Milltown. 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 USC00122660 (English). Public domain.