Conway climate

Conway Frost Dates and Growing Season

NOAA 1991-2020 normals for Murfreesboro, 13.4 km from Conway, elevation 100 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Murfreesboro. 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 6 and the first fall freeze around November 1, a growing season of about 208 days.

Median at 36°F
last April 21, first October 24
Median at 32°F
last April 6, first November 1
Median at 28°F
last March 26, first November 10

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

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°F205199193189184180176172164
32°F227221216212208204199195187
28°F255245241236231227223218212
24°F291279271265260254248242234
20°F323311304297291285277268260
16°F362347336330323314307302291

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
99% of years
16°F or colder
90% 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
3,717
Cooling degree days, base 65°F
1,386
Growing degree days, base 40°F
7,129
Growing degree days, base 45°F
5,652
Growing degree days, base 50°F
4,341
Growing degree days, base 55°F
3,195
Growing degree days, base 60°F
2,210

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January800023
February647129
March538390
April24930259
May84108489
June8279721
July0400865
August1338803
September22186613
October20137313
November470398
December697138

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 13.4 km from Conway. 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 USC00315996 (Murfreesboro). Public domain.