Orderville climate

Orderville Frost Dates and Growing Season

NOAA 1991-2020 normals for Orderville, 0.4 km from Orderville, elevation 5460 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Orderville. 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 15 and the first fall freeze around October 8, a growing season of about 144 days.

Median at 36°F
last May 31, first September 28
Median at 32°F
last May 15, first October 8
Median at 28°F
last April 30, first October 18

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 13Jun 8Jun 4Jun 2May 31May 27May 22May 19May 14
32°FJun 4May 29May 23May 19May 15May 11May 8May 4Apr 30
28°FMay 18May 12May 7May 3Apr 30Apr 28Apr 23Apr 20Apr 14
24°FMay 4Apr 26Apr 22Apr 18Apr 13Apr 10Apr 5Apr 1Mar 24
20°FApr 13Apr 6Apr 3Mar 30Mar 23Mar 17Mar 12Mar 7Feb 28
16°FMar 29Mar 14Mar 8Mar 5Mar 2Feb 26Feb 21Feb 15Feb 6

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 15Sep 20Sep 23Sep 26Sep 28Oct 1Oct 3Oct 6Oct 10
32°FSep 26Sep 30Oct 2Oct 5Oct 8Oct 10Oct 13Oct 17Oct 21
28°FOct 4Oct 10Oct 13Oct 16Oct 18Oct 22Oct 25Oct 28Nov 2
24°FOct 15Oct 20Oct 24Oct 28Oct 30Nov 2Nov 5Nov 8Nov 12
20°FOct 26Oct 31Nov 4Nov 7Nov 10Nov 13Nov 15Nov 18Nov 22
16°FNov 5Nov 10Nov 15Nov 17Nov 20Nov 22Nov 26Nov 30Dec 4

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°F140134128124120116112107101
32°F164158154149144140135130121
28°F192184179175170166161156149
24°F222213207202197193189183175
20°F256247240234229223218210201
16°F290279272267261256251242230

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
5,403
Cooling degree days, base 65°F
634
Growing degree days, base 40°F
5,040
Growing degree days, base 45°F
3,820
Growing degree days, base 50°F
2,791
Growing degree days, base 55°F
1,925
Growing degree days, base 60°F
1,203

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January97800
February79701
March676012
April489061
May24910244
June48105507
July1254718
August4207668
September7355433
October3892135
November713012
December98600

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 0.4 km from Orderville. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00426534 (Orderville). Public domain.