Liberty climate

Liberty Frost Dates and Growing Season

NOAA 1991-2020 normals for Quincy Rgnl AP, 9.6 km from Liberty, elevation 769 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Quincy Rgnl AP. 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 14 and the first fall freeze around October 23, a growing season of about 191 days.

Median at 36°F
last April 25, first October 13
Median at 32°F
last April 14, first October 23
Median at 28°F
last April 4, 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 10May 6May 2Apr 29Apr 25Apr 22Apr 19Apr 16Apr 11
32°FMay 1Apr 25Apr 21Apr 18Apr 14Apr 11Apr 8Apr 4Mar 30
28°FApr 20Apr 14Apr 10Apr 7Apr 4Apr 1Mar 29Mar 25Mar 18
24°FApr 9Apr 4Apr 1Mar 28Mar 25Mar 21Mar 16Mar 12Mar 6
20°FApr 1Mar 26Mar 21Mar 17Mar 14Mar 10Mar 7Mar 3Feb 25
16°FMar 22Mar 17Mar 12Mar 9Mar 6Mar 3Feb 28Feb 24Feb 16

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 28Oct 4Oct 7Oct 10Oct 13Oct 16Oct 18Oct 22Oct 25
32°FOct 10Oct 15Oct 17Oct 20Oct 23Oct 25Oct 28Oct 31Nov 4
28°FOct 20Oct 24Oct 27Oct 30Nov 1Nov 4Nov 6Nov 10Nov 14
24°FOct 31Nov 2Nov 5Nov 8Nov 11Nov 14Nov 18Nov 23Nov 29
20°FNov 8Nov 12Nov 16Nov 19Nov 22Nov 25Nov 29Dec 3Dec 9
16°FNov 15Nov 20Nov 25Nov 28Dec 1Dec 4Dec 8Dec 13Dec 19

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°F189182177173169165161155149
32°F211205200195191187182177171
28°F234226220216212208202197191
24°F254247241237232227223217211
20°F276266260256251246241236228
16°F294286280274269264259253244

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
5,486
Cooling degree days, base 65°F
1,153
Growing degree days, base 40°F
6,032
Growing degree days, base 45°F
4,796
Growing degree days, base 50°F
3,691
Growing degree days, base 55°F
2,715
Growing degree days, base 60°F
1,866

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,19001
February94608
March714252
April36714173
May13087426
June13245682
July1350814
August4298759
September73133512
October33123214
November682146
December1,03505

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 9.6 km from Liberty. 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 USW00093989 (Quincy Rgnl AP). Public domain.