New Beaver climate

New Beaver Frost Dates and Growing Season

NOAA 1991-2020 normals for New Castle 1 N, 15.7 km from New Beaver, elevation 825 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for New Castle 1 N. 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 30 and the first fall freeze around October 23, a growing season of about 175 days.

Median at 36°F
last May 11, first October 9
Median at 32°F
last April 30, first October 23
Median at 28°F
last April 20, first November 2

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 27May 23May 19May 15May 11May 8May 4Apr 30Apr 26
32°FMay 19May 12May 7May 3Apr 30Apr 28Apr 24Apr 21Apr 17
28°FMay 6Apr 30Apr 26Apr 22Apr 20Apr 17Apr 14Apr 11Apr 6
24°FApr 20Apr 16Apr 12Apr 9Apr 6Apr 4Apr 2Mar 30Mar 24
20°FApr 7Apr 3Mar 31Mar 29Mar 26Mar 23Mar 19Mar 16Mar 11
16°FMar 30Mar 26Mar 22Mar 18Mar 15Mar 12Mar 9Mar 5Feb 28

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 28Oct 1Oct 3Oct 6Oct 9Oct 12Oct 16Oct 19Oct 23
32°FOct 6Oct 11Oct 16Oct 20Oct 23Oct 25Oct 28Nov 1Nov 4
28°FOct 20Oct 26Oct 29Nov 1Nov 2Nov 5Nov 8Nov 10Nov 15
24°FNov 2Nov 5Nov 8Nov 11Nov 13Nov 16Nov 19Nov 23Nov 30
20°FNov 8Nov 12Nov 16Nov 20Nov 23Nov 27Dec 1Dec 5Dec 10
16°FNov 16Nov 24Nov 29Dec 2Dec 6Dec 10Dec 15Dec 20Dec 27

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°F171164160155151146142137131
32°F193187182178175171166161153
28°F217210205202198194189183176
24°F241234228225221217214210204
20°F266258252247243238233228222
16°F290280275269264259254247239

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
5,800
Cooling degree days, base 65°F
781
Growing degree days, base 40°F
5,335
Growing degree days, base 45°F
4,140
Growing degree days, base 50°F
3,088
Growing degree days, base 55°F
2,178
Growing degree days, base 60°F
1,407

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,14902
February99102
March842025
April4735107
May19946324
June38152564
July3256718
August7219677
September7991463
October36011169
November678031
December98105

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 15.7 km from New Beaver. 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 USC00366233 (New Castle 1 N). Public domain.