Lander County climate

Lander County Frost Dates and Growing Season

NOAA 1991-2020 normals for Beowawe 49S - U Of N Rch, 38.6 km from Lander County, elevation 5740 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Beowawe 49S - U Of N Rch. 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 28 and the first fall freeze around September 21, a growing season of about 114 days.

Median at 36°F
last June 11, first September 9
Median at 32°F
last May 28, first September 21
Median at 28°F
last May 12, first October 1

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

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°FAug 26Sep 1Sep 3Sep 6Sep 9Sep 12Sep 15Sep 19Sep 22
32°FSep 6Sep 10Sep 15Sep 18Sep 21Sep 24Sep 26Sep 29Oct 3
28°FSep 18Sep 23Sep 26Sep 29Oct 1Oct 3Oct 6Oct 9Oct 14
24°FSep 27Sep 30Oct 3Oct 7Oct 10Oct 13Oct 16Oct 19Oct 24
20°FOct 5Oct 10Oct 14Oct 16Oct 19Oct 23Oct 26Oct 30Nov 4
16°FOct 14Oct 19Oct 23Oct 27Oct 31Nov 3Nov 7Nov 12Nov 19

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°F10910397938985817569
32°F1371301241201141091059991
28°F161155149144140136130125116
24°F188180174170165160156150142
20°F220210204199192187181175166
16°F254244236230224218212203193

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
6,613
Cooling degree days, base 65°F
406
Growing degree days, base 40°F
4,186
Growing degree days, base 45°F
3,077
Growing degree days, base 50°F
2,169
Growing degree days, base 55°F
1,437
Growing degree days, base 60°F
849

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,11800
February89601
March78605
April615030
May3694160
June13352377
July12195648
August24132574
September18022304
October524067
November82205
December1,13600

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 38.6 km from Lander County. 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 USC00260800 (Beowawe 49S - U Of N Rch). Public domain.