Beulah climate

Beulah Frost Dates and Growing Season

NOAA 1991-2020 normals for Frankfort 2NE, 9.6 km from Beulah, elevation 948 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Frankfort 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 May 2 and the first fall freeze around October 26, a growing season of about 175 days.

Median at 36°F
last May 16, first October 12
Median at 32°F
last May 2, first October 26
Median at 28°F
last April 20, first November 7

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 31May 27May 23May 20May 16May 13May 9May 4Apr 30
32°FMay 20May 14May 9May 6May 2Apr 30Apr 27Apr 23Apr 19
28°FMay 6Apr 30Apr 27Apr 23Apr 20Apr 17Apr 13Apr 9Apr 4
24°FApr 21Apr 16Apr 13Apr 9Apr 7Apr 4Apr 2Mar 30Mar 24
20°FApr 10Apr 5Apr 2Mar 31Mar 29Mar 26Mar 21Mar 17Mar 13
16°FApr 2Mar 29Mar 26Mar 22Mar 18Mar 15Mar 12Mar 7Feb 28

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 26Oct 1Oct 5Oct 8Oct 12Oct 15Oct 18Oct 23Oct 28
32°FOct 7Oct 14Oct 19Oct 22Oct 26Oct 30Nov 1Nov 4Nov 9
28°FOct 24Oct 29Nov 1Nov 4Nov 7Nov 9Nov 13Nov 17Nov 23
24°FNov 4Nov 8Nov 12Nov 16Nov 19Nov 22Nov 26Nov 30Dec 4
20°FNov 14Nov 19Nov 23Nov 27Nov 30Dec 3Dec 6Dec 12Dec 18
16°FNov 25Nov 30Dec 4Dec 7Dec 12Dec 16Dec 20Dec 24Jan 1

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°F170162157152148144139132126
32°F195188183178175170164159151
28°F223215211206203197192187179
24°F248241235230226222218212206
20°F271263257252248243239233226
16°F291283277273268264259254247

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
7,107
Cooling degree days, base 65°F
396
Growing degree days, base 40°F
4,173
Growing degree days, base 45°F
3,148
Growing degree days, base 50°F
2,257
Growing degree days, base 55°F
1,496
Growing degree days, base 60°F
870

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,28500
February1,12400
March1,00908
April655138
May34314186
June9666421
July22143586
August24126567
September15043349
October482394
November79809
December1,12100

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 9.6 km from Beulah. 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 USC00202984 (Frankfort 2NE). Public domain.