Uniontown climate

Uniontown Frost Dates and Growing Season

NOAA 1991-2020 normals for Jt Myers Locks & Dam, 5.9 km from Uniontown, elevation 340 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Jt Myers Locks & Dam. 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 5 and the first fall freeze around October 31, a growing season of about 209 days.

Median at 36°F
last April 15, first October 21
Median at 32°F
last April 5, first October 31
Median at 28°F
last March 24, first November 8

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 5Apr 28Apr 23Apr 19Apr 15Apr 13Apr 9Apr 6Apr 2
32°FApr 21Apr 14Apr 11Apr 8Apr 5Apr 2Mar 31Mar 26Mar 21
28°FApr 9Apr 3Mar 31Mar 28Mar 24Mar 21Mar 17Mar 12Mar 6
24°FMar 30Mar 24Mar 20Mar 17Mar 13Mar 8Mar 5Mar 1Feb 24
20°FMar 19Mar 14Mar 8Mar 5Mar 2Feb 28Feb 23Feb 17Feb 9
16°FMar 12Mar 5Mar 1Feb 24Feb 20Feb 15Feb 10Feb 4Jan 27

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 17Oct 19Oct 21Oct 24Oct 26Oct 29Nov 1
32°FOct 19Oct 23Oct 26Oct 29Oct 31Nov 1Nov 4Nov 7Nov 11
28°FOct 30Nov 1Nov 3Nov 5Nov 8Nov 10Nov 14Nov 18Nov 26
24°FNov 4Nov 8Nov 11Nov 14Nov 18Nov 22Nov 27Dec 1Dec 7
20°FNov 12Nov 17Nov 22Nov 27Dec 1Dec 4Dec 8Dec 15Dec 22
16°FNov 22Nov 30Dec 4Dec 9Dec 15Dec 20Dec 24Dec 30Jan 7

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°F206200195191188183178172165
32°F230223217212209205201196189
28°F251244239235230226221215209
24°F275267261256252246242236228
20°F302293286279274268263258249
16°F329319311304298292286278269

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
4,374
Cooling degree days, base 65°F
1,437
Growing degree days, base 40°F
6,857
Growing degree days, base 45°F
5,486
Growing degree days, base 50°F
4,262
Growing degree days, base 55°F
3,186
Growing degree days, base 60°F
2,242

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January96507
February774018
March579478
April26121245
May79123511
June3296742
July1404868
August1368832
September31184603
October23937285
November576262
December865011

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 5.9 km from Uniontown. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00128967 (Jt Myers Locks & Dam). Public domain.