Pearson climate

Pearson Frost Dates and Growing Season

NOAA 1991-2020 normals for Homerville 5 N, 25.1 km from Pearson, elevation 187 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Homerville 5 N. 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 11 and the first fall freeze around November 17, a growing season of about 253 days.

Median at 36°F
last March 27, first November 6
Median at 32°F
last March 11, first November 17
Median at 28°F
last February 22, first December 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°FApr 20Apr 10Apr 4Mar 31Mar 27Mar 22Mar 17Mar 12Mar 4
32°FApr 3Mar 26Mar 20Mar 16Mar 11Mar 7Mar 2Feb 25Feb 17
28°FMar 17Mar 10Mar 4Feb 28Feb 22Feb 16Feb 10Feb 3Jan 25
24°FMar 1Feb 23Feb 15Feb 9Feb 4Jan 31Jan 25Jan 17Jan 1
20°FFeb 21Feb 9Feb 4Jan 31Jan 25Jan 17Jan 12Jan 2Dec 24
16°FFeb 14Feb 6Jan 31Jan 24Jan 17Jan 12Jan 4Dec 30Dec 19

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 24Oct 29Nov 1Nov 3Nov 6Nov 9Nov 12Nov 17Nov 23
32°FOct 31Nov 5Nov 9Nov 13Nov 17Nov 20Nov 24Dec 1Dec 7
28°FNov 11Nov 17Nov 23Nov 28Dec 1Dec 6Dec 13Dec 24Jan 4
24°FNov 24Dec 1Dec 7Dec 14Dec 23Jan 1Jan 5Jan 13Jan 30
20°FDec 5Dec 15Dec 23Jan 1Jan 4Jan 11Jan 17Jan 29Feb 8
16°FDec 15Dec 23Jan 1Jan 4Jan 13Jan 17Jan 27Feb 1Feb 11

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°F255244237231225220214207197
32°F283273264259253246240233221
28°F321308301293285279269261252
24°F359346336329321314306297283
20°F365365365364353345337328313
16°F365365365365365365365361342

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
99% of years
24°F or colder
92% of years
20°F or colder
60% of years
16°F or colder
21% 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
1,847
Cooling degree days, base 65°F
2,299
Growing degree days, base 40°F
9,619
Growing degree days, base 45°F
7,882
Growing degree days, base 50°F
6,254
Growing degree days, base 55°F
4,767
Growing degree days, base 60°F
3,442

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January4815115
February3388146
March20934310
April8188459
May13244696
June0413862
July0498962
August0480945
September2353801
October60139546
November24529261
December4189150

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 25.1 km from Pearson. 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 USC00094429 (Homerville 5 N). Public domain.