Campbellsburg climate

Campbellsburg Frost Dates and Growing Season

NOAA 1991-2020 normals for Vevay, 26.8 km from Campbellsburg, elevation 495 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Vevay. 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 9 and the first fall freeze around November 1, a growing season of about 204 days.

Median at 36°F
last April 22, first October 21
Median at 32°F
last April 9, first November 1
Median at 28°F
last March 29, first November 10

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 7May 2Apr 28Apr 25Apr 22Apr 19Apr 16Apr 12Apr 6
32°FApr 25Apr 19Apr 16Apr 13Apr 9Apr 6Apr 3Mar 31Mar 26
28°FApr 12Apr 6Apr 2Mar 31Mar 29Mar 25Mar 22Mar 18Mar 13
24°FApr 1Mar 28Mar 23Mar 20Mar 17Mar 13Mar 9Mar 5Feb 28
20°FMar 22Mar 17Mar 14Mar 10Mar 6Mar 3Feb 27Feb 22Feb 12
16°FMar 14Mar 7Mar 3Feb 28Feb 24Feb 19Feb 12Feb 6Jan 31

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 8Oct 13Oct 16Oct 19Oct 21Oct 23Oct 25Oct 29Nov 1
32°FOct 20Oct 23Oct 26Oct 30Nov 1Nov 2Nov 5Nov 9Nov 14
28°FOct 30Nov 1Nov 5Nov 7Nov 10Nov 13Nov 17Nov 22Nov 30
24°FNov 7Nov 11Nov 15Nov 18Nov 22Nov 27Dec 1Dec 5Dec 11
20°FNov 15Nov 21Nov 27Dec 1Dec 4Dec 9Dec 14Dec 20Dec 26
16°FNov 27Dec 3Dec 9Dec 14Dec 20Dec 23Dec 26Jan 1Jan 9

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°F199193188185181178173168161
32°F224217212208204201196191184
28°F251243236232228222218213206
24°F276268262256252247242236229
20°F303294287281275270263256247
16°F327315309303299293286280270

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
4,410
Cooling degree days, base 65°F
1,381
Growing degree days, base 40°F
6,767
Growing degree days, base 45°F
5,410
Growing degree days, base 50°F
4,193
Growing degree days, base 55°F
3,114
Growing degree days, base 60°F
2,175

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January98109
February787010
March597266
April27024240
May72117510
June7272715
July0397862
August0363828
September30180600
October24326272
November569267
December856014

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 26.8 km from Campbellsburg. 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 USC00129080 (Vevay). Public domain.