Sebeka climate

Sebeka Frost Dates and Growing Season

NOAA 1991-2020 normals for New York Mills, 25.5 km from Sebeka, elevation 1406 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for New York Mills. 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 10 and the first fall freeze around September 29, a growing season of about 141 days.

Median at 36°F
last May 21, first September 21
Median at 32°F
last May 10, first September 29
Median at 28°F
last May 1, first October 10

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 3May 30May 27May 24May 21May 18May 15May 12May 6
32°FMay 24May 20May 16May 13May 10May 7May 4May 1Apr 28
28°FMay 15May 11May 6May 3May 1Apr 29Apr 26Apr 23Apr 17
24°FMay 6May 1Apr 28Apr 25Apr 22Apr 19Apr 16Apr 12Apr 7
20°FApr 27Apr 22Apr 18Apr 15Apr 12Apr 9Apr 7Apr 4Mar 31
16°FApr 20Apr 15Apr 10Apr 7Apr 5Apr 3Apr 1Mar 28Mar 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°FSep 7Sep 12Sep 16Sep 19Sep 21Sep 23Sep 26Sep 28Oct 1
32°FSep 17Sep 21Sep 25Sep 27Sep 29Oct 1Oct 4Oct 7Oct 11
28°FSep 27Oct 1Oct 4Oct 7Oct 10Oct 13Oct 16Oct 19Oct 23
24°FOct 6Oct 11Oct 15Oct 19Oct 21Oct 24Oct 26Oct 30Nov 3
20°FOct 15Oct 22Oct 26Oct 29Nov 1Nov 3Nov 6Nov 9Nov 14
16°FOct 29Nov 1Nov 4Nov 7Nov 9Nov 11Nov 14Nov 17Nov 22

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°F139133129125122118114109103
32°F158152149145141138134129121
28°F179172168163160156152148142
24°F201193188184180175171167160
20°F220213207204199195191186179
16°F236229224220216212209204197

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
9,440
Cooling degree days, base 65°F
304
Growing degree days, base 40°F
3,661
Growing degree days, base 45°F
2,748
Growing degree days, base 50°F
1,948
Growing degree days, base 55°F
1,268
Growing degree days, base 60°F
706

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,78100
February1,49200
March1,23203
April756024
May3808160
June9956409
July27135573
August6181485
September24824251
October691141
November1,11301
December1,56100

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 25.5 km from Sebeka. 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 USC00215902 (New York Mills). Public domain.