Mooreville climate

Mooreville Frost Dates and Growing Season

NOAA 1991-2020 normals for Fulton 3 W, 11.1 km from Mooreville, elevation 350 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Fulton 3 W. 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 1 and the first fall freeze around October 31, a growing season of about 212 days.

Median at 36°F
last April 11, first October 22
Median at 32°F
last April 1, first October 31
Median at 28°F
last March 21, first November 9

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 27Apr 22Apr 18Apr 15Apr 11Apr 8Apr 6Apr 2Mar 28
32°FApr 16Apr 11Apr 7Apr 5Apr 1Mar 29Mar 25Mar 22Mar 16
28°FApr 6Apr 1Mar 28Mar 24Mar 21Mar 16Mar 12Mar 7Mar 1
24°FMar 25Mar 19Mar 15Mar 11Mar 7Mar 2Feb 28Feb 23Feb 15
20°FMar 15Mar 7Mar 2Feb 27Feb 22Feb 17Feb 11Feb 4Jan 26
16°FMar 5Feb 24Feb 17Feb 11Feb 4Jan 31Jan 24Jan 18Jan 8

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 9Oct 13Oct 17Oct 20Oct 22Oct 25Oct 27Oct 30Nov 3
32°FOct 17Oct 22Oct 25Oct 28Oct 31Nov 1Nov 4Nov 8Nov 14
28°FOct 25Nov 1Nov 3Nov 6Nov 9Nov 12Nov 16Nov 20Nov 27
24°FNov 4Nov 9Nov 14Nov 18Nov 22Nov 27Dec 1Dec 5Dec 14
20°FNov 14Nov 21Nov 28Dec 1Dec 6Dec 11Dec 21Dec 31Jan 8
16°FNov 28Dec 6Dec 14Dec 23Dec 30Jan 3Jan 8Jan 15Jan 29

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°F212206200196192188183178172
32°F235226221216212207203198190
28°F260252245240234229224219210
24°F289279272266261255249244234
20°F323311303296289283276268259
16°F354342334326319311304295285

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
93% 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
3,276
Cooling degree days, base 65°F
1,713
Growing degree days, base 40°F
7,858
Growing degree days, base 45°F
6,330
Growing degree days, base 50°F
4,950
Growing degree days, base 55°F
3,715
Growing degree days, base 60°F
2,635

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January763033
February582150
March4099159
April17546336
May40157583
June1331780
July0442907
August0420885
September13241678
October16957368
November4465121
December677252

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 11.1 km from Mooreville. 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 USC00223208 (Fulton 3 W). Public domain.