Cedarville climate

Cedarville Frost Dates and Growing Season

NOAA 1991-2020 normals for Cedarville, 0.5 km from Cedarville, elevation 4688 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Cedarville. 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 1, a growing season of about 137 days.

Median at 36°F
last June 3, first September 20
Median at 32°F
last May 15, first October 1
Median at 28°F
last April 27, first October 13

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 19Jun 14Jun 10Jun 7Jun 3Jun 1May 27May 21May 14
32°FJun 6May 31May 26May 20May 15May 10May 6May 2Apr 28
28°FMay 16May 7May 3Apr 30Apr 27Apr 23Apr 21Apr 18Apr 12
24°FApr 29Apr 23Apr 19Apr 15Apr 12Apr 8Apr 5Mar 31Mar 23
20°FApr 11Apr 7Apr 1Mar 29Mar 23Mar 18Mar 13Mar 6Feb 28
16°FMar 22Mar 14Mar 8Mar 4Feb 28Feb 25Feb 18Feb 13Feb 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°FSep 5Sep 10Sep 13Sep 17Sep 20Sep 22Sep 25Sep 28Oct 3
32°FSep 16Sep 22Sep 26Sep 29Oct 1Oct 4Oct 6Oct 10Oct 16
28°FSep 29Oct 3Oct 6Oct 10Oct 13Oct 15Oct 18Oct 22Oct 28
24°FOct 10Oct 15Oct 18Oct 22Oct 25Oct 28Nov 1Nov 5Nov 10
20°FOct 21Oct 27Oct 30Nov 2Nov 6Nov 10Nov 14Nov 19Nov 25
16°FNov 1Nov 7Nov 12Nov 16Nov 20Nov 24Nov 28Dec 2Dec 9

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°F131123117112107103999385
32°F161154148142137132125118110
28°F189182176172167163158154145
24°F219211205200195191186180173
20°F258247240233228221216210201
16°F296285276269263257250243233

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
6,006
Cooling degree days, base 65°F
616
Growing degree days, base 40°F
4,651
Growing degree days, base 45°F
3,503
Growing degree days, base 50°F
2,548
Growing degree days, base 55°F
1,762
Growing degree days, base 60°F
1,124

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,00100
February82001
March74708
April567049
May32814197
June12080415
July12260713
August19202648
September12758388
October4433118
November780010
December1,04000

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 0.5 km from Cedarville. 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 USC00041614 (Cedarville). Public domain.