Brooksville climate

Brooksville Frost Dates and Growing Season

NOAA 1991-2020 normals for Augusta 2, 10.7 km from Brooksville, elevation 508 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Augusta 2. 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 11 and the first fall freeze around October 30, a growing season of about 200 days.

Median at 36°F
last April 24, first October 18
Median at 32°F
last April 11, first October 30
Median at 28°F
last March 31, first November 9

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 12May 6May 2Apr 29Apr 24Apr 21Apr 18Apr 14Apr 9
32°FMay 2Apr 22Apr 18Apr 15Apr 11Apr 8Apr 5Apr 2Mar 30
28°FApr 15Apr 10Apr 5Apr 2Mar 31Mar 28Mar 24Mar 19Mar 13
24°FApr 4Mar 31Mar 26Mar 22Mar 19Mar 16Mar 11Mar 6Feb 28
20°FMar 25Mar 19Mar 15Mar 11Mar 7Mar 3Feb 28Feb 23Feb 14
16°FMar 16Mar 8Mar 4Feb 28Feb 25Feb 19Feb 12Feb 6Jan 30

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 5Oct 9Oct 12Oct 15Oct 18Oct 20Oct 23Oct 26Oct 31
32°FOct 16Oct 20Oct 24Oct 27Oct 30Nov 1Nov 2Nov 6Nov 10
28°FOct 28Nov 1Nov 3Nov 6Nov 9Nov 12Nov 15Nov 18Nov 25
24°FNov 6Nov 11Nov 14Nov 18Nov 21Nov 25Nov 29Dec 3Dec 9
20°FNov 15Nov 21Nov 26Nov 30Dec 3Dec 7Dec 12Dec 19Dec 27
16°FNov 27Dec 4Dec 9Dec 14Dec 19Dec 24Dec 29Jan 2Jan 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°F197189185180176172167162154
32°F219212208204200196190185177
28°F245238232227223218214208201
24°F273265258252247242237231224
20°F300291285279275268262255245
16°F326316307302297292286280270

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
4,700
Cooling degree days, base 65°F
1,148
Growing degree days, base 40°F
6,299
Growing degree days, base 45°F
4,952
Growing degree days, base 50°F
3,775
Growing degree days, base 55°F
2,759
Growing degree days, base 60°F
1,886

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,01603
February82705
March630049
April31414202
May10198465
June4226672
July0344809
August2299762
September57144537
October28223231
November590037
December87705

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 10.7 km from Brooksville. 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 USC00150290 (Augusta 2). Public domain.