Blissfield climate

Blissfield Frost Dates and Growing Season

NOAA 1991-2020 normals for Adrian 2 Nne, 15.8 km from Blissfield, elevation 760 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Adrian 2 Nne. 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 1 and the first fall freeze around October 15, a growing season of about 164 days.

Median at 36°F
last May 13, first October 3
Median at 32°F
last May 1, first October 15
Median at 28°F
last April 20, first October 27

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 27May 23May 19May 16May 13May 10May 6May 2Apr 29
32°FMay 17May 12May 8May 5May 1Apr 29Apr 26Apr 22Apr 18
28°FMay 7May 1Apr 27Apr 24Apr 20Apr 18Apr 14Apr 11Apr 6
24°FApr 22Apr 18Apr 14Apr 10Apr 7Apr 5Apr 2Mar 31Mar 25
20°FApr 11Apr 6Apr 3Mar 31Mar 29Mar 26Mar 22Mar 18Mar 13
16°FApr 2Mar 29Mar 25Mar 22Mar 18Mar 16Mar 12Mar 9Mar 3

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 21Sep 25Sep 28Oct 1Oct 3Oct 5Oct 8Oct 11Oct 15
32°FOct 1Oct 5Oct 9Oct 12Oct 15Oct 17Oct 20Oct 24Oct 29
28°FOct 12Oct 18Oct 22Oct 24Oct 27Oct 31Nov 1Nov 4Nov 9
24°FOct 25Oct 30Nov 1Nov 3Nov 6Nov 9Nov 12Nov 16Nov 20
20°FNov 3Nov 8Nov 12Nov 15Nov 18Nov 21Nov 25Nov 29Dec 3
16°FNov 12Nov 19Nov 23Nov 27Nov 30Dec 3Dec 7Dec 12Dec 20

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°F160154150146143140135130124
32°F185178173169164160156150143
28°F207201196193189185181176168
24°F232225221217213209205201194
20°F258250244240235231227222216
16°F282273267262256250246239231

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
6,338
Cooling degree days, base 65°F
696
Growing degree days, base 40°F
4,978
Growing degree days, base 45°F
3,850
Growing degree days, base 50°F
2,861
Growing degree days, base 55°F
2,006
Growing degree days, base 60°F
1,279

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,23701
February1,05801
March887015
April514480
May21739300
June37150562
July6238697
August13188640
September11770407
October4217134
November755021
December1,07702

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 15.8 km from Blissfield. 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 USC00200032 (Adrian 2 Nne). Public domain.