Manning climate

Manning Frost Dates and Growing Season

NOAA 1991-2020 normals for Dickinson Rch Hq, 6.7 km from Manning, elevation 2380 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Dickinson Rch Hq. 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 18 and the first fall freeze around September 24, a growing season of about 127 days.

Median at 36°F
last May 28, first September 16
Median at 32°F
last May 18, first September 24
Median at 28°F
last May 9, first October 3

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 11Jun 5Jun 2May 30May 28May 25May 23May 19May 15
32°FMay 31May 27May 24May 21May 18May 15May 13May 10May 5
28°FMay 21May 17May 14May 12May 9May 6May 3Apr 30Apr 24
24°FMay 13May 9May 5May 2Apr 29Apr 25Apr 21Apr 18Apr 13
20°FMay 3Apr 29Apr 24Apr 20Apr 18Apr 15Apr 12Apr 9Apr 6
16°FApr 24Apr 19Apr 16Apr 13Apr 10Apr 7Apr 5Apr 2Mar 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 3Sep 7Sep 11Sep 14Sep 16Sep 19Sep 21Sep 24Sep 28
32°FSep 11Sep 16Sep 19Sep 22Sep 24Sep 26Sep 30Oct 2Oct 6
28°FSep 20Sep 24Sep 27Sep 30Oct 3Oct 5Oct 8Oct 11Oct 16
24°FSep 27Oct 2Oct 6Oct 9Oct 12Oct 15Oct 18Oct 21Oct 25
20°FOct 7Oct 12Oct 15Oct 19Oct 21Oct 24Oct 27Oct 29Nov 3
16°FOct 14Oct 20Oct 23Oct 27Oct 30Nov 1Nov 5Nov 9Nov 14

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°F1271221181141101061029789
32°F146139135131127123119115108
28°F165159153150146142138134126
24°F185179174169165161156152144
20°F204198193189185180176171163
16°F223215209205201197193188180

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
8,705
Cooling degree days, base 65°F
414
Growing degree days, base 40°F
3,846
Growing degree days, base 45°F
2,906
Growing degree days, base 50°F
2,088
Growing degree days, base 55°F
1,394
Growing degree days, base 60°F
829

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,57500
February1,31200
March1,11303
April714030
May3839166
June11757394
July29169604
August47146565
September23830273
October674149
November1,06204
December1,44100

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 6.7 km from Manning. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00322193 (Dickinson Rch Hq). Public domain.