Victor climate

Victor Frost Dates and Growing Season

NOAA 1991-2020 normals for Victor 2NW, 3.9 km from Victor, elevation 588 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Victor 2NW. 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 May 2 and the first fall freeze around October 17, a growing season of about 167 days.

Median at 36°F
last May 12, first October 4
Median at 32°F
last May 2, first October 17
Median at 28°F
last April 20, 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 25May 21May 18May 15May 12May 9May 6May 2Apr 29
32°FMay 18May 11May 7May 4May 2Apr 29Apr 27Apr 23Apr 19
28°FMay 6May 1Apr 27Apr 23Apr 20Apr 18Apr 15Apr 11Apr 6
24°FApr 21Apr 17Apr 13Apr 10Apr 7Apr 4Apr 2Mar 31Mar 26
20°FApr 10Apr 5Apr 2Apr 1Mar 30Mar 27Mar 23Mar 19Mar 14
16°FApr 3Mar 31Mar 27Mar 24Mar 21Mar 18Mar 15Mar 11Mar 6

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 22Sep 27Sep 30Oct 2Oct 4Oct 7Oct 10Oct 14Oct 19
32°FOct 2Oct 6Oct 10Oct 14Oct 17Oct 21Oct 24Oct 28Nov 1
28°FOct 14Oct 21Oct 26Oct 29Nov 1Nov 3Nov 6Nov 9Nov 14
24°FOct 30Nov 4Nov 7Nov 10Nov 12Nov 15Nov 17Nov 21Nov 28
20°FNov 10Nov 14Nov 17Nov 20Nov 24Nov 27Dec 1Dec 4Dec 9
16°FNov 19Nov 24Nov 28Dec 1Dec 3Dec 6Dec 11Dec 16Dec 21

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°F163157152148144140136131125
32°F188180176171167162158153147
28°F213205200197192188183178169
24°F237230225221217214209204197
20°F260252247242238233230226220
16°F276269264259255251247242235

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
6,457
Cooling degree days, base 65°F
476
Growing degree days, base 40°F
4,546
Growing degree days, base 45°F
3,456
Growing degree days, base 50°F
2,498
Growing degree days, base 55°F
1,674
Growing degree days, base 60°F
1,000

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,16800
February1,06900
March97800
April600031
May23917257
June4891493
July4190651
August9150605
September13827341
October417195
November734025
December1,05300

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 3.9 km from Victor. 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 USC00308839 (Victor 2NW). Public domain.