Barton climate

Barton Frost Dates and Growing Season

NOAA 1991-2020 normals for Sutton 2NE, 15.2 km from Barton, elevation 1000 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Sutton 2NE. 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 June 1 and the first fall freeze around September 13, a growing season of about 103 days.

Median at 36°F
last June 12, first September 1
Median at 32°F
last June 1, first September 13
Median at 28°F
last May 21, first September 27

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°FJul 5Jun 25Jun 20Jun 16Jun 12Jun 9Jun 6Jun 3May 30
32°FJun 15Jun 9Jun 6Jun 3Jun 1May 30May 27May 24May 19
28°FJun 4May 31May 27May 24May 21May 18May 14May 10May 5
24°FMay 21May 16May 12May 9May 6May 3Apr 30Apr 28Apr 24
20°FMay 8May 3Apr 29Apr 26Apr 23Apr 21Apr 17Apr 14Apr 9
16°FApr 25Apr 20Apr 16Apr 13Apr 11Apr 9Apr 7Apr 4Apr 2

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°FAug 13Aug 19Aug 24Aug 28Sep 1Sep 3Sep 5Sep 9Sep 14
32°FAug 30Sep 3Sep 7Sep 10Sep 13Sep 16Sep 19Sep 24Sep 28
28°FSep 12Sep 17Sep 21Sep 24Sep 27Sep 30Oct 1Oct 5Oct 10
24°FSep 23Sep 30Oct 2Oct 4Oct 7Oct 11Oct 14Oct 19Oct 26
20°FOct 4Oct 9Oct 14Oct 18Oct 22Oct 27Nov 1Nov 3Nov 8
16°FOct 19Oct 26Oct 31Nov 2Nov 4Nov 7Nov 11Nov 14Nov 18

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°F999287837873665949
32°F122116112108103100969185
28°F149142137132127124119114107
24°F176169163159154150145140131
20°F202196190186181176171166158
16°F224218213209206202197192185

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
9,628
Cooling degree days, base 65°F
126
Growing degree days, base 40°F
3,015
Growing degree days, base 45°F
2,153
Growing degree days, base 50°F
1,414
Growing degree days, base 55°F
813
Growing degree days, base 60°F
380

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,68300
February1,45900
March1,30701
April833012
May4582105
June19426290
July8554434
August12736375
September3268173
October699024
November1,03101
December1,42800

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 15.2 km from Barton. 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 USC00438172 (Sutton 2NE). Public domain.