Wagener climate

Wagener Frost Dates and Growing Season

NOAA 1991-2020 normals for Wagener 1SW, 1.7 km from Wagener, elevation 380 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Wagener 1SW. 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 26 and the first fall freeze around November 9, a growing season of about 230 days.

Median at 36°F
last April 6, first November 1
Median at 32°F
last March 26, first November 9
Median at 28°F
last March 12, first November 23

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 23Apr 17Apr 13Apr 9Apr 6Apr 3Mar 31Mar 27Mar 21
32°FApr 10Apr 5Apr 1Mar 29Mar 26Mar 22Mar 18Mar 14Mar 7
28°FMar 30Mar 25Mar 21Mar 16Mar 12Mar 7Mar 1Feb 24Feb 15
24°FMar 19Mar 13Mar 6Feb 28Feb 22Feb 15Feb 7Jan 31Jan 21
20°FMar 8Feb 27Feb 15Feb 5Jan 31Jan 28Jan 21Jan 14Jan 1
16°FFeb 25Feb 9Feb 2Jan 30Jan 24Jan 19Jan 13Jan 8Dec 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 17Oct 23Oct 26Oct 30Nov 1Nov 3Nov 5Nov 8Nov 13
32°FOct 27Nov 1Nov 3Nov 6Nov 9Nov 12Nov 15Nov 20Nov 27
28°FNov 5Nov 10Nov 14Nov 18Nov 23Nov 27Dec 1Dec 6Dec 16
24°FNov 19Nov 27Dec 2Dec 6Dec 12Dec 20Dec 26Jan 1Jan 9
20°FDec 5Dec 12Dec 21Dec 28Jan 1Jan 6Jan 11Jan 17Jan 30
16°FDec 17Dec 28Jan 2Jan 6Jan 10Jan 14Jan 19Jan 29Feb 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°F229222216211207203198193186
32°F256246239234230225221215208
28°F291279270262257251245238231
24°F329316306299293286279270258
20°F365351341334328319309301290
16°F365365365365362352341333313

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
88% of years
16°F or colder
55% 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
2,562
Cooling degree days, base 65°F
1,837
Growing degree days, base 40°F
8,492
Growing degree days, base 45°F
6,816
Growing degree days, base 50°F
5,283
Growing degree days, base 55°F
3,935
Growing degree days, base 60°F
2,794

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January606161
February445061
March34111188
April11437377
May29167603
June0361811
July0468933
August0440905
September9267708
October10572434
November35813144
December555058

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 1.7 km from Wagener. 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 USC00388879 (Wagener 1SW). Public domain.