Hempstead County climate

Hempstead County Frost Dates and Growing Season

NOAA 1991-2020 normals for Hope 3 Ne, 10.7 km from Hempstead County, elevation 375 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Hope 3 Ne. 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 March 26 and the first fall freeze around November 6, a growing season of about 226 days.

Median at 36°F
last April 7, first October 29
Median at 32°F
last March 26, first November 6
Median at 28°F
last March 11, first November 17

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 24Apr 19Apr 14Apr 10Apr 7Apr 4Apr 1Mar 28Mar 21
32°FApr 13Apr 7Apr 3Mar 31Mar 26Mar 23Mar 18Mar 13Mar 5
28°FMar 31Mar 25Mar 20Mar 15Mar 11Mar 7Mar 3Feb 27Feb 20
24°FMar 14Mar 8Mar 4Feb 28Feb 24Feb 19Feb 15Feb 6Jan 28
20°FMar 4Feb 26Feb 18Feb 12Feb 6Feb 1Jan 27Jan 19Jan 8
16°FFeb 21Feb 11Feb 4Jan 30Jan 24Jan 18Jan 13Jan 5Dec 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°FOct 16Oct 20Oct 23Oct 26Oct 29Nov 1Nov 2Nov 6Nov 12
32°FOct 23Oct 29Nov 1Nov 3Nov 6Nov 9Nov 13Nov 18Nov 26
28°FNov 1Nov 6Nov 9Nov 13Nov 17Nov 22Nov 27Dec 1Dec 6
24°FNov 10Nov 16Nov 21Nov 27Dec 1Dec 5Dec 11Dec 20Dec 29
20°FNov 21Nov 29Dec 5Dec 12Dec 20Dec 27Jan 1Jan 6Jan 15
16°FDec 6Dec 16Dec 25Jan 1Jan 4Jan 9Jan 14Jan 19Feb 2

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°F226218212207203199195189183
32°F253243236231226221217210203
28°F281272265260254248242236226
24°F317305297290282277270263252
20°F353338331324317310302294281
16°F365365365356347340332324311

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
95% 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
2,952
Cooling degree days, base 65°F
2,040
Growing degree days, base 40°F
8,411
Growing degree days, base 45°F
6,834
Growing degree days, base 50°F
5,402
Growing degree days, base 55°F
4,119
Growing degree days, base 60°F
2,998

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January702240
February529365
March36213184
April15553357
May28188625
June1383832
July0512976
August0496961
September11297736
October13680417
November39512153
December634255

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 10.7 km from Hempstead 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 USC00033428 (Hope 3 Ne). Public domain.