Hainesville climate

Hainesville Frost Dates and Growing Season

NOAA 1991-2020 normals for Lake Villa 2NE, 9.6 km from Hainesville, elevation 840 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lake Villa 2NE. 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 24 and the first fall freeze around October 23, a growing season of about 180 days.

Median at 36°F
last May 5, first October 11
Median at 32°F
last April 24, first October 23
Median at 28°F
last April 13, first November 3

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 21May 15May 11May 7May 5May 2Apr 30Apr 26Apr 22
32°FMay 9May 4Apr 30Apr 27Apr 24Apr 21Apr 19Apr 16Apr 11
28°FApr 28Apr 22Apr 19Apr 16Apr 13Apr 10Apr 7Apr 4Mar 31
24°FApr 16Apr 10Apr 7Apr 4Apr 2Mar 31Mar 28Mar 23Mar 17
20°FApr 5Apr 1Mar 30Mar 26Mar 22Mar 19Mar 15Mar 12Mar 7
16°FMar 28Mar 23Mar 19Mar 16Mar 13Mar 10Mar 7Mar 3Feb 25

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 2Oct 6Oct 9Oct 11Oct 14Oct 17Oct 20Oct 25
32°FOct 8Oct 13Oct 17Oct 20Oct 23Oct 25Oct 28Oct 31Nov 4
28°FOct 20Oct 26Oct 29Nov 1Nov 3Nov 6Nov 9Nov 12Nov 16
24°FNov 1Nov 4Nov 7Nov 10Nov 13Nov 15Nov 17Nov 22Nov 26
20°FNov 7Nov 11Nov 14Nov 17Nov 20Nov 23Nov 27Dec 1Dec 5
16°FNov 12Nov 18Nov 22Nov 26Nov 29Dec 1Dec 5Dec 10Dec 17

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°F178172166162157154149144138
32°F200193187183180175171166159
28°F221215210205202198194188181
24°F244237232227223220216211205
20°F264257252247243239234229223
16°F285277271265260256251245238

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
6,653
Cooling degree days, base 65°F
722
Growing degree days, base 40°F
4,927
Growing degree days, base 45°F
3,826
Growing degree days, base 50°F
2,852
Growing degree days, base 55°F
2,009
Growing degree days, base 60°F
1,296

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,32500
February1,09901
March908015
April547572
May24537276
June53147544
July5244703
August10202657
September11278421
October4198141
November780020
December1,15002

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 Hainesville. 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 USC00114837 (Lake Villa 2NE). Public domain.