Sneedville climate

Sneedville Frost Dates and Growing Season

NOAA 1991-2020 normals for Rogersville 1 Ne, 24.4 km from Sneedville, elevation 1355 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Rogersville 1 Ne. 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 April 14 and the first fall freeze around October 24, a growing season of about 192 days.

Median at 36°F
last April 27, first October 15
Median at 32°F
last April 14, first October 24
Median at 28°F
last April 2, first November 1

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

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°FOct 5Oct 8Oct 10Oct 13Oct 15Oct 18Oct 21Oct 24Oct 29
32°FOct 11Oct 15Oct 19Oct 21Oct 24Oct 26Oct 29Nov 1Nov 4
28°FOct 20Oct 24Oct 27Oct 30Nov 1Nov 4Nov 7Nov 11Nov 16
24°FOct 31Nov 3Nov 6Nov 9Nov 13Nov 15Nov 19Nov 24Dec 1
20°FNov 8Nov 14Nov 17Nov 22Nov 26Nov 30Dec 3Dec 9Dec 18
16°FNov 20Nov 27Dec 1Dec 5Dec 10Dec 17Dec 22Dec 29Jan 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°F190184179175171168163158151
32°F211204199196192188184178171
28°F236228222218214210206201194
24°F263254248241236232227222215
20°F292283275270263258252246237
16°F324313306299292286278272261

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
4,217
Cooling degree days, base 65°F
1,080
Growing degree days, base 40°F
6,531
Growing degree days, base 45°F
5,126
Growing degree days, base 50°F
3,883
Growing degree days, base 55°F
2,798
Growing degree days, base 60°F
1,863

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January91809
February716016
March559175
April27414226
May8882462
June7210652
July0316781
August1286750
September31150569
October24820264
November554164
December822014

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 24.4 km from Sneedville. 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 USC00407884 (Rogersville 1 Ne). Public domain.