Eupora climate

Eupora Frost Dates and Growing Season

NOAA 1991-2020 normals for Eupora 2 E, 3.8 km from Eupora, elevation 440 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Eupora 2 E. 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 30 and the first fall freeze around November 4, a growing season of about 218 days.

Median at 36°F
last April 12, first October 25
Median at 32°F
last March 30, first November 4
Median at 28°F
last March 16, first November 16

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 26Apr 21Apr 18Apr 14Apr 12Apr 9Apr 5Apr 1Mar 26
32°FApr 16Apr 10Apr 6Apr 3Mar 30Mar 27Mar 22Mar 17Mar 12
28°FApr 4Mar 29Mar 24Mar 19Mar 16Mar 12Mar 7Mar 2Feb 25
24°FMar 20Mar 13Mar 8Mar 4Feb 28Feb 25Feb 20Feb 13Feb 4
20°FMar 10Mar 2Feb 25Feb 18Feb 11Feb 6Jan 31Jan 26Jan 14
16°FMar 2Feb 19Feb 9Feb 1Jan 30Jan 25Jan 18Jan 11Jan 1

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 12Oct 17Oct 20Oct 22Oct 25Oct 28Oct 31Nov 2Nov 7
32°FOct 21Oct 26Oct 30Nov 1Nov 4Nov 6Nov 9Nov 14Nov 21
28°FNov 1Nov 4Nov 8Nov 12Nov 16Nov 20Nov 24Nov 30Dec 4
24°FNov 8Nov 15Nov 21Nov 25Dec 1Dec 3Dec 8Dec 16Dec 30
20°FNov 21Dec 1Dec 5Dec 12Dec 20Dec 28Jan 1Jan 7Jan 16
16°FDec 5Dec 17Dec 26Jan 1Jan 3Jan 8Jan 14Jan 20Feb 1

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°F219211205201196192188183175
32°F244234228223218214209204196
28°F273264258252246241234228218
24°F308298288282275269263255244
20°F343331322313306300293283270
16°F365363351342334329320311299

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
98% of years
16°F or colder
79% 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
2,969
Cooling degree days, base 65°F
1,890
Growing degree days, base 40°F
8,262
Growing degree days, base 45°F
6,688
Growing degree days, base 50°F
5,261
Growing degree days, base 55°F
3,979
Growing degree days, base 60°F
2,856

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January708145
February531268
March36414184
April15957361
May30189625
June0353802
July0463928
August0446911
September10281721
October14272406
November3999145
December627264

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 3.8 km from Eupora. 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 USC00222896 (Eupora 2 E). Public domain.