Hydetown climate

Hydetown Frost Dates and Growing Season

NOAA 1991-2020 normals for Titusville Wtr Wks, 3.7 km from Hydetown, elevation 1220 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Titusville Wtr Wks. 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 12 and the first fall freeze around October 10, a growing season of about 149 days.

Median at 36°F
last May 25, first September 29
Median at 32°F
last May 12, first October 10
Median at 28°F
last May 1, first October 21

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°FJun 7Jun 2May 31May 28May 25May 22May 19May 15May 10
32°FMay 28May 23May 19May 16May 12May 9May 6May 2Apr 29
28°FMay 19May 12May 8May 4May 1Apr 29Apr 26Apr 22Apr 17
24°FMay 6Apr 30Apr 27Apr 23Apr 21Apr 18Apr 15Apr 10Apr 6
20°FApr 22Apr 18Apr 15Apr 12Apr 8Apr 5Apr 3Mar 31Mar 25
16°FApr 14Apr 7Apr 4Apr 1Mar 30Mar 26Mar 23Mar 19Mar 14

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 14Sep 20Sep 24Sep 27Sep 29Oct 1Oct 3Oct 7Oct 11
32°FSep 25Oct 1Oct 3Oct 6Oct 10Oct 12Oct 15Oct 18Oct 23
28°FOct 4Oct 11Oct 15Oct 18Oct 21Oct 24Oct 28Nov 1Nov 5
24°FOct 18Oct 23Oct 28Nov 1Nov 2Nov 5Nov 8Nov 12Nov 17
20°FNov 1Nov 4Nov 7Nov 11Nov 14Nov 18Nov 21Nov 24Nov 29
16°FNov 8Nov 14Nov 18Nov 21Nov 25Nov 28Dec 1Dec 5Dec 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°F146138133128124120116111102
32°F169162158153149145141135126
28°F192186181176172168163157149
24°F218210205202197193188183174
20°F240234229225221217212207200
16°F265256250245241236231226219

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
6,966
Cooling degree days, base 65°F
402
Growing degree days, base 40°F
4,336
Growing degree days, base 45°F
3,259
Growing degree days, base 50°F
2,326
Growing degree days, base 55°F
1,529
Growing degree days, base 60°F
879

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,27402
February1,12601
March987010
April596262
May29224235
June8180450
July25145584
August38109536
September15840338
October487394
November794013
December1,10802

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 3.7 km from Hydetown. 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 USC00368888 (Titusville Wtr Wks). Public domain.