Schlusser climate

Schlusser Frost Dates and Growing Season

NOAA 1991-2020 normals for Carlisle Wtp, 2.1 km from Schlusser, elevation 430 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Carlisle Wtp. 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 April 23 and the first fall freeze around October 18, a growing season of about 177 days.

Median at 36°F
last May 3, first October 6
Median at 32°F
last April 23, first October 18
Median at 28°F
last April 10, first November 1

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°FMay 19May 14May 10May 6May 3Apr 30Apr 28Apr 25Apr 20
32°FMay 9May 3Apr 30Apr 26Apr 23Apr 20Apr 17Apr 14Apr 9
28°FApr 24Apr 18Apr 15Apr 13Apr 10Apr 7Apr 4Apr 1Mar 28
24°FApr 10Apr 5Apr 2Mar 31Mar 29Mar 26Mar 22Mar 18Mar 13
20°FMar 31Mar 26Mar 23Mar 19Mar 16Mar 13Mar 9Mar 6Feb 28
16°FMar 22Mar 16Mar 12Mar 9Mar 6Mar 2Feb 28Feb 24Feb 17

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 25Sep 30Oct 2Oct 4Oct 6Oct 9Oct 12Oct 16Oct 21
32°FOct 4Oct 8Oct 11Oct 15Oct 18Oct 21Oct 24Oct 29Nov 2
28°FOct 14Oct 20Oct 24Oct 28Nov 1Nov 3Nov 5Nov 9Nov 14
24°FOct 28Nov 1Nov 5Nov 8Nov 12Nov 15Nov 18Nov 22Nov 29
20°FNov 9Nov 14Nov 18Nov 22Nov 27Nov 30Dec 3Dec 6Dec 15
16°FNov 21Nov 29Dec 2Dec 5Dec 9Dec 14Dec 19Dec 24Dec 30

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°F173166162158155151146141135
32°F198191186181177172168162155
28°F222215210206202199194188182
24°F249242236231227223219214206
20°F277270264259254249244238231
16°F305296290284279274269264256

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
5,559
Cooling degree days, base 65°F
826
Growing degree days, base 40°F
5,410
Growing degree days, base 45°F
4,214
Growing degree days, base 50°F
3,156
Growing degree days, base 55°F
2,238
Growing degree days, base 60°F
1,461

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,10701
February94403
March792022
April4395113
May17440338
June23167594
July1280744
August4230691
September8392460
October36212165
November663024
December96902

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 2.1 km from Schlusser. 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 USC00361920 (Carlisle Wtp). Public domain.