Tremont climate

Tremont Frost Dates and Growing Season

NOAA 1991-2020 normals for New York Laguardia AP, 8.1 km from Tremont, elevation 11 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for New York Laguardia 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 March 26 and the first fall freeze around November 25, a growing season of about 244 days.

Median at 36°F
last April 3, first November 13
Median at 32°F
last March 26, first November 25
Median at 28°F
last March 15, first December 5

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°FApr 15Apr 10Apr 7Apr 5Apr 3Apr 2Mar 31Mar 28Mar 23
32°FApr 6Apr 3Apr 1Mar 29Mar 26Mar 23Mar 20Mar 17Mar 12
28°FMar 30Mar 25Mar 21Mar 18Mar 15Mar 13Mar 10Mar 7Mar 2
24°FMar 21Mar 17Mar 13Mar 10Mar 7Mar 4Mar 1Feb 25Feb 18
20°FMar 13Mar 7Mar 4Mar 1Feb 26Feb 22Feb 17Feb 11Feb 4
16°FMar 3Feb 27Feb 21Feb 17Feb 11Feb 6Feb 1Jan 27Jan 15

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°FNov 1Nov 5Nov 8Nov 10Nov 13Nov 16Nov 19Nov 23Nov 30
32°FNov 10Nov 14Nov 17Nov 21Nov 25Nov 28Dec 1Dec 4Dec 10
28°FNov 19Nov 24Nov 29Dec 1Dec 5Dec 8Dec 12Dec 18Dec 24
24°FNov 30Dec 4Dec 8Dec 13Dec 17Dec 21Dec 25Dec 31Jan 6
20°FDec 9Dec 17Dec 21Dec 26Dec 29Jan 2Jan 6Jan 12Jan 20
16°FDec 18Dec 28Jan 1Jan 5Jan 9Jan 13Jan 18Jan 25Feb 2

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°F242237232228224220216212205
32°F265258253249244240235231224
28°F285278272268264259255250244
24°F305299293288283279274268261
20°F328318312306302298293287281
16°F351339333328324318313307301

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
94% 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
4,376
Cooling degree days, base 65°F
1,408
Growing degree days, base 40°F
6,719
Growing degree days, base 45°F
5,334
Growing degree days, base 50°F
4,121
Growing degree days, base 55°F
3,064
Growing degree days, base 60°F
2,161

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January94804
February80406
March681131
April35110157
May11172427
June11263702
July0439904
August0396860
September21195624
October19832309
November478184
December774016

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 8.1 km from Tremont. 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 USW00014732 (New York Laguardia AP). Public domain.