Huron climate

Huron Frost Dates and Growing Season

NOAA 1991-2020 normals for Lemoore Reeves Nas, 20 km from Huron, elevation 232 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lemoore Reeves Nas. 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 February 24 and the first fall freeze around November 22, a growing season of about 265 days.

Median at 36°F
last April 2, first November 8
Median at 32°F
last February 24, first November 22
Median at 28°F
last January 20, first December 4

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°FApr 23Apr 17Apr 11Apr 7Apr 2Mar 27Mar 19Mar 10Feb 28
32°FMar 30Mar 17Mar 8Mar 1Feb 24Feb 17Feb 10Feb 2Jan 21
28°FFeb 25Feb 13Feb 3Jan 28Jan 20Jan 12Jan 6Dec 30Dec 19
24°FJan 28Jan 16Jan 9Jan 2Dec 31Dec 26Dec 20Dec 15Dec 5
20°FJan 16Jan 7Dec 31Dec 30Dec 27Dec 22Dec 19Dec 14Dec 11
16°F–––––––––

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 24Oct 29Nov 2Nov 5Nov 8Nov 11Nov 14Nov 19Nov 25
32°FNov 3Nov 9Nov 13Nov 18Nov 22Nov 26Nov 30Dec 4Dec 10
28°FNov 19Nov 24Nov 28Dec 1Dec 4Dec 9Dec 15Dec 26Jan 8
24°FNov 28Dec 1Dec 5Dec 9Dec 15Dec 19Dec 25Jan 1Jan 11
20°FDec 5Dec 10Dec 14Dec 18Dec 21Dec 25Dec 29Jan 1Jan 11
16°F–––––––––

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°F254240232226219213208201192
32°F308293283274265258250241230
28°F354342334327321312306294281
24°F365365365364357349343336328
20°F365365365365365365365365353
16°F365365365365365365365365365

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
93% of years
24°F or colder
56% of years
20°F or colder
17% of years
16°F or colder
2% 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
2,485
Cooling degree days, base 65°F
1,778
Growing degree days, base 40°F
8,434
Growing degree days, base 45°F
6,705
Growing degree days, base 50°F
5,150
Growing degree days, base 55°F
3,817
Growing degree days, base 60°F
2,697

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January574024
February398072
March2793203
April15534331
May42157580
June4307753
July0476941
August0431896
September6289734
October8380462
November3562131
December589024

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 20 km from Huron. 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 USW00023110 (Lemoore Reeves Nas). Public domain.