Cedar Grove climate

Cedar Grove Frost Dates and Growing Season

NOAA 1991-2020 normals for Stanley 2 Nne, 22.4 km from Cedar Grove, elevation 6375 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Stanley 2 Nne. 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 9 and the first fall freeze around October 7, a growing season of about 150 days.

Median at 36°F
last May 21, first September 29
Median at 32°F
last May 9, first October 7
Median at 28°F
last April 30, first October 17

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

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 17Sep 21Sep 24Sep 27Sep 29Oct 1Oct 3Oct 6Oct 10
32°FSep 25Sep 30Oct 2Oct 5Oct 7Oct 10Oct 13Oct 16Oct 20
28°FOct 2Oct 7Oct 11Oct 14Oct 17Oct 19Oct 22Oct 25Oct 30
24°FOct 11Oct 16Oct 20Oct 23Oct 26Oct 29Nov 1Nov 4Nov 9
20°FOct 20Oct 24Oct 28Nov 1Nov 3Nov 6Nov 10Nov 14Nov 18
16°FOct 27Nov 1Nov 5Nov 10Nov 14Nov 17Nov 21Nov 24Nov 29

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°F147141137133129126122117110
32°F167162157153150146142138130
28°F187180176172168164161156149
24°F209202197193189186182175169
20°F237227221216211206202196188
16°F266257251245238233226219210

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
5,732
Cooling degree days, base 65°F
493
Growing degree days, base 40°F
4,845
Growing degree days, base 45°F
3,652
Growing degree days, base 50°F
2,625
Growing degree days, base 55°F
1,757
Growing degree days, base 60°F
1,045

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,07100
February83201
March708013
April482074
May23714261
June38110522
July4194656
August9139595
September10336385
October4270113
November75907
December1,06300

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 22.4 km from Cedar Grove. 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 USC00298518 (Stanley 2 Nne). Public domain.