Nye County climate

Nye County Frost Dates and Growing Season

NOAA 1991-2020 normals for Twin Spring Fallini, 31.5 km from Nye County, elevation 5300 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Twin Spring Fallini. 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 10 and the first fall freeze around September 30, a growing season of about 141 days.

Median at 36°F
last May 26, first September 17
Median at 32°F
last May 10, first September 30
Median at 28°F
last April 25, first October 11

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 15Jun 7Jun 2May 30May 26May 22May 18May 15May 9
32°FJun 2May 24May 17May 13May 10May 6May 3Apr 30Apr 24
28°FMay 12May 4May 1Apr 28Apr 25Apr 22Apr 18Apr 13Apr 7
24°FApr 30Apr 23Apr 18Apr 15Apr 10Apr 6Apr 2Mar 30Mar 21
20°FApr 15Apr 8Apr 3Mar 31Mar 27Mar 20Mar 13Mar 6Feb 26
16°FApr 1Mar 25Mar 15Mar 9Mar 2Feb 26Feb 20Feb 15Feb 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°FSep 4Sep 8Sep 12Sep 15Sep 17Sep 20Sep 23Sep 27Oct 1
32°FSep 15Sep 20Sep 24Sep 27Sep 30Oct 2Oct 5Oct 8Oct 12
28°FSep 28Oct 2Oct 5Oct 7Oct 11Oct 14Oct 16Oct 19Oct 24
24°FOct 11Oct 15Oct 18Oct 20Oct 22Oct 25Oct 28Oct 31Nov 3
20°FOct 19Oct 24Oct 27Oct 30Nov 1Nov 3Nov 5Nov 8Nov 12
16°FOct 28Nov 1Nov 4Nov 7Nov 9Nov 13Nov 16Nov 19Nov 22

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°F1351281221171131091059889
32°F163156149145141136131126118
28°F191184179173169164159154145
24°F219211205201196191187181171
20°F248239232226220214209204195
16°F277269263257251245238230220

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
5,861
Cooling degree days, base 65°F
701
Growing degree days, base 40°F
5,009
Growing degree days, base 45°F
3,828
Growing degree days, base 50°F
2,818
Growing degree days, base 55°F
1,964
Growing degree days, base 60°F
1,261

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,11300
February81500
March673015
April459083
May22422280
June53131530
July1295759
August7220679
September11432370
October4440100
November83103
December1,12800

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 31.5 km from Nye County. 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 USC00268443 (Twin Spring Fallini). Public domain.