Wallace Ridge climate

Wallace Ridge Frost Dates and Growing Season

NOAA 1991-2020 normals for Jonesville Locks, 25.5 km from Wallace Ridge, elevation 70 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Jonesville Locks. 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 6 and the first fall freeze around November 22, a growing season of about 261 days.

Median at 36°F
last March 19, first November 10
Median at 32°F
last March 6, first November 22
Median at 28°F
last February 22, first December 5

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 5Mar 31Mar 28Mar 23Mar 19Mar 15Mar 10Mar 5Feb 28
32°FMar 25Mar 19Mar 15Mar 10Mar 6Mar 2Feb 28Feb 22Feb 9
28°FMar 16Mar 8Mar 3Feb 28Feb 22Feb 14Feb 2Jan 27Jan 16
24°FMar 5Feb 26Feb 15Feb 4Jan 30Jan 22Jan 14Jan 4Dec 23
20°FFeb 26Feb 6Jan 31Jan 22Jan 16Jan 10Jan 4Dec 30Dec 21
16°FFeb 1Jan 24Jan 21Jan 15Jan 10Jan 6Jan 1Dec 29Dec 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 27Nov 1Nov 3Nov 6Nov 10Nov 13Nov 17Nov 22Nov 29
32°FNov 3Nov 8Nov 13Nov 17Nov 22Nov 26Dec 1Dec 4Dec 11
28°FNov 13Nov 21Nov 27Dec 1Dec 5Dec 10Dec 18Dec 29Jan 6
24°FNov 28Dec 5Dec 11Dec 20Dec 27Jan 1Jan 7Jan 15Feb 1
20°FDec 9Dec 21Dec 27Dec 31Jan 4Jan 8Jan 13Jan 22Feb 5
16°FDec 17Dec 27Dec 31Jan 2Jan 6Jan 10Jan 15Jan 20Jan 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°F262253246241236232226219212
32°F291281273266261255249243234
28°F332319307299292284276268258
24°F365357346339331320310300288
20°F365365365365364354345335321
16°F365365365365365365365365351

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
87% of years
20°F or colder
49% of years
16°F or colder
16% 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
2,185
Cooling degree days, base 65°F
2,289
Growing degree days, base 40°F
9,313
Growing degree days, base 45°F
7,627
Growing degree days, base 50°F
6,063
Growing degree days, base 55°F
4,642
Growing degree days, base 60°F
3,374

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January559381
February4037118
March25424269
April9182444
May11249704
June0417867
July0502967
August0501966
September3356802
October76125518
November28818223
December5026104

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 Wallace Ridge. 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 USC00164739 (Jonesville Locks). Public domain.