New Bloomfield climate

New Bloomfield Frost Dates and Growing Season

NOAA 1991-2020 normals for Columbia Rgnl AP, 15.4 km from New Bloomfield, elevation 893 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Columbia Rgnl 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 7 and the first fall freeze around October 29, a growing season of about 205 days.

Median at 36°F
last April 19, first October 19
Median at 32°F
last April 7, first October 29
Median at 28°F
last March 28, first November 6

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 2Apr 29Apr 25Apr 21Apr 19Apr 16Apr 13Apr 9Apr 4
32°FApr 21Apr 16Apr 13Apr 10Apr 7Apr 4Apr 1Mar 30Mar 23
28°FApr 11Apr 7Apr 3Mar 31Mar 28Mar 24Mar 20Mar 16Mar 10
24°FApr 3Mar 29Mar 25Mar 20Mar 17Mar 14Mar 9Mar 5Feb 28
20°FMar 25Mar 18Mar 14Mar 11Mar 7Mar 4Feb 28Feb 25Feb 18
16°FMar 16Mar 11Mar 7Mar 3Feb 28Feb 25Feb 20Feb 14Feb 5

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°FOct 5Oct 9Oct 13Oct 16Oct 19Oct 21Oct 23Oct 26Oct 31
32°FOct 16Oct 20Oct 23Oct 26Oct 29Oct 31Nov 2Nov 5Nov 11
28°FOct 24Oct 29Nov 1Nov 3Nov 6Nov 9Nov 12Nov 16Nov 21
24°FNov 2Nov 6Nov 9Nov 13Nov 16Nov 20Nov 23Nov 29Dec 5
20°FNov 9Nov 15Nov 20Nov 23Nov 27Dec 1Dec 4Dec 9Dec 16
16°FNov 19Nov 25Nov 29Dec 2Dec 6Dec 11Dec 17Dec 21Dec 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°F202195190186182178174169162
32°F226219213209205201197192185
28°F248240235230226222217213204
24°F270261256251247243237232224
20°F291281275270265260254248240
16°F310300294287281276272265256

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
4,681
Cooling degree days, base 65°F
1,448
Growing degree days, base 40°F
6,756
Growing degree days, base 45°F
5,423
Growing degree days, base 50°F
4,226
Growing degree days, base 55°F
3,165
Growing degree days, base 60°F
2,238

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,05405
February819017
March596587
April28527238
May90114491
June7294738
July0419883
August1379843
September47173577
October26734268
November592367
December925012

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 15.4 km from New Bloomfield. 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 USW00003945 (Columbia Rgnl AP). Public domain.