Cokeville climate

Cokeville Frost Dates and Growing Season

NOAA 1991-2020 normals for Lifton Pumping Stn, 29.9 km from Cokeville, elevation 5935 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lifton Pumping Stn. 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 19 and the first fall freeze around September 21, a growing season of about 123 days.

Median at 36°F
last June 6, first September 9
Median at 32°F
last May 19, first September 21
Median at 28°F
last May 3, first October 3

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

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 25Aug 31Sep 2Sep 6Sep 9Sep 11Sep 15Sep 18Sep 22
32°FSep 5Sep 10Sep 15Sep 18Sep 21Sep 24Sep 27Oct 1Oct 5
28°FSep 19Sep 24Sep 27Oct 1Oct 3Oct 6Oct 10Oct 14Oct 19
24°FSep 29Oct 3Oct 7Oct 11Oct 15Oct 18Oct 22Oct 25Oct 31
20°FOct 11Oct 18Oct 22Oct 25Oct 28Oct 31Nov 2Nov 6Nov 11
16°FOct 24Oct 29Nov 1Nov 5Nov 7Nov 11Nov 14Nov 17Nov 21

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°F114107101969288837768
32°F146138132127123119115109100
28°F172164159155151147143137130
24°F198192186182177172168163156
20°F223216212208204201196190183
16°F245238232228224220215211204

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
8,857
Cooling degree days, base 65°F
133
Growing degree days, base 40°F
3,068
Growing degree days, base 45°F
2,198
Growing degree days, base 50°F
1,470
Growing degree days, base 55°F
875
Growing degree days, base 60°F
421

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,45400
February1,27100
March1,11300
April76507
May492182
June21811258
July4676496
August7643433
September3142174
October690020
November1,03700
December1,38300

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 29.9 km from Cokeville. 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 USC00105275 (Lifton Pumping Stn). Public domain.