Beatty climate

Beatty Frost Dates and Growing Season

NOAA 1991-2020 normals for Beatty 8 N, 10.2 km from Beatty, elevation 3550 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Beatty 8 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 12 and the first fall freeze around November 3, a growing season of about 204 days.

Median at 36°F
last April 28, first October 23
Median at 32°F
last April 12, first November 3
Median at 28°F
last March 27, first November 13

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 22May 10May 4Apr 30Apr 28Apr 25Apr 22Apr 18Apr 13
32°FApr 30Apr 24Apr 19Apr 16Apr 12Apr 10Apr 7Apr 4Mar 28
28°FApr 15Apr 9Apr 4Apr 1Mar 27Mar 20Mar 14Mar 7Feb 28
24°FApr 2Mar 20Mar 12Mar 6Feb 28Feb 22Feb 17Feb 11Feb 4
20°FMar 5Feb 22Feb 15Feb 8Feb 2Jan 27Jan 19Jan 11Dec 31
16°FFeb 5Jan 26Jan 17Jan 11Jan 6Dec 31Dec 25Dec 17Dec 9

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 5Oct 11Oct 16Oct 19Oct 23Oct 25Oct 30Nov 3Nov 7
32°FOct 18Oct 23Oct 27Oct 30Nov 3Nov 6Nov 8Nov 11Nov 16
28°FOct 28Nov 1Nov 6Nov 10Nov 13Nov 16Nov 19Nov 22Nov 27
24°FNov 5Nov 13Nov 17Nov 20Nov 23Nov 27Dec 1Dec 3Dec 9
20°FNov 17Nov 24Nov 28Dec 1Dec 5Dec 8Dec 12Dec 19Dec 27
16°FNov 28Dec 3Dec 8Dec 14Dec 20Dec 26Jan 1Jan 6Jan 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°F198191186180177171166159147
32°F223217212208204199194188179
28°F260250242237231224219211201
24°F299287280271264257250240229
20°F340330322314306300291281268
16°F365365364356349343337330316

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
74% 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
3,430
Cooling degree days, base 65°F
1,576
Growing degree days, base 40°F
7,412
Growing degree days, base 45°F
5,856
Growing degree days, base 50°F
4,506
Growing degree days, base 55°F
3,355
Growing degree days, base 60°F
2,383

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January71506
February554022
March4310102
April26310216
May81103488
June11289728
July0491956
August0433897
September12212650
October14939361
November475177
December73904

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 10.2 km from Beatty. 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 USC00260718 (Beatty 8 N). Public domain.