Manning climate

Manning Frost Dates and Growing Season

NOAA 1991-2020 normals for Manning, 1.2 km from Manning, elevation 85 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Manning. 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 25 and the first fall freeze around November 11, a growing season of about 232 days.

Median at 36°F
last April 4, first November 1
Median at 32°F
last March 25, first November 11
Median at 28°F
last March 9, first November 24

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 20Apr 15Apr 11Apr 8Apr 4Apr 2Mar 30Mar 25Mar 18
32°FApr 11Apr 4Apr 1Mar 29Mar 25Mar 21Mar 16Mar 10Mar 1
28°FMar 29Mar 23Mar 18Mar 14Mar 9Mar 5Feb 28Feb 22Feb 14
24°FMar 17Mar 9Mar 4Feb 26Feb 20Feb 14Feb 6Jan 31Jan 19
20°FMar 6Feb 25Feb 13Feb 5Jan 31Jan 26Jan 18Jan 10Dec 30
16°FFeb 28Feb 5Jan 30Jan 25Jan 20Jan 15Jan 9Jan 3Dec 22

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 19Oct 24Oct 27Oct 30Nov 1Nov 3Nov 6Nov 10Nov 16
32°FOct 30Nov 2Nov 5Nov 8Nov 11Nov 15Nov 19Nov 24Dec 1
28°FNov 7Nov 12Nov 16Nov 20Nov 24Nov 29Dec 3Dec 8Dec 20
24°FNov 18Nov 24Dec 1Dec 4Dec 10Dec 17Dec 25Jan 1Jan 10
20°FDec 1Dec 9Dec 16Dec 25Jan 1Jan 4Jan 10Jan 17Feb 1
16°FDec 12Dec 22Dec 31Jan 3Jan 9Jan 14Jan 19Jan 27Feb 8

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°F230222217212208205200196189
32°F259249243237232227221216210
28°F291281273267262255248240232
24°F335321310303296288281271260
20°F365359348337331322313303291
16°F365365365365365357345336321

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
99% of years
20°F or colder
86% of years
16°F or colder
48% 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
2,595
Cooling degree days, base 65°F
1,950
Growing degree days, base 40°F
8,600
Growing degree days, base 45°F
6,962
Growing degree days, base 50°F
5,464
Growing degree days, base 55°F
4,125
Growing degree days, base 60°F
2,949

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January615265
February479276
March33414206
April12862390
May26198637
June1376825
July0485950
August0447911
September8275717
October11575429
November34413176
December546382

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 1.2 km from Manning. 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 USC00385493 (Manning). Public domain.