Rosepine climate

Rosepine Frost Dates and Growing Season

NOAA 1991-2020 normals for Rosepine Rsch Stn, 2.9 km from Rosepine, elevation 238 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Rosepine Rsch 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 March 8 and the first fall freeze around November 21, a growing season of about 259 days.

Median at 36°F
last March 24, first November 8
Median at 32°F
last March 8, first November 21
Median at 28°F
last February 19, first December 7

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°FApr 13Apr 5Apr 1Mar 29Mar 24Mar 19Mar 15Mar 9Mar 1
32°FMar 31Mar 23Mar 18Mar 14Mar 8Mar 2Feb 26Feb 21Feb 12
28°FMar 17Mar 8Mar 2Feb 26Feb 19Feb 11Feb 3Jan 30Jan 20
24°FMar 5Feb 25Feb 12Feb 4Jan 30Jan 25Jan 18Jan 9Dec 29
20°FFeb 20Feb 4Jan 29Jan 25Jan 18Jan 13Jan 8Jan 2Dec 26
16°FFeb 7Jan 29Jan 24Jan 18Jan 12Jan 9Jan 6Jan 2Dec 31

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 25Oct 30Nov 2Nov 5Nov 8Nov 12Nov 16Nov 20Nov 28
32°FNov 3Nov 8Nov 13Nov 17Nov 21Nov 27Dec 1Dec 4Dec 11
28°FNov 15Nov 24Nov 29Dec 3Dec 7Dec 12Dec 20Dec 28Jan 6
24°FDec 4Dec 12Dec 19Dec 26Jan 1Jan 3Jan 8Jan 16Jan 31
20°FDec 16Dec 27Jan 1Jan 3Jan 7Jan 10Jan 16Jan 26Feb 4
16°FDec 27Jan 1Jan 3Jan 6Jan 10Jan 14Jan 19Jan 26Feb 3

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°F257248242236231226220213205
32°F291279270264259252245239228
28°F333320309301294286277269258
24°F365357347338333325314304291
20°F365365365365365358348336323
16°F365365365365365365365365355

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
99% of years
24°F or colder
86% of years
20°F or colder
49% of years
16°F or colder
18% 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
1,904
Cooling degree days, base 65°F
2,476
Growing degree days, base 40°F
9,746
Growing degree days, base 45°F
8,023
Growing degree days, base 50°F
6,410
Growing degree days, base 55°F
4,938
Growing degree days, base 60°F
3,621

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January5026106
February34711147
March21537311
April81106478
May9265721
June0440889
July0527992
August0528993
September2371819
October63147551
November24329267
December44311136

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 2.9 km from Rosepine. 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 USC00168046 (Rosepine Rsch Stn). Public domain.