Senath climate

Senath Frost Dates and Growing Season

NOAA 1991-2020 normals for Kennett Radio Kboa, 12.7 km from Senath, elevation 270 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Kennett Radio Kboa. 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 31 and the first fall freeze around November 1, a growing season of about 215 days.

Median at 36°F
last April 9, first October 22
Median at 32°F
last March 31, first November 1
Median at 28°F
last March 19, first November 13

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 26Apr 21Apr 16Apr 12Apr 9Apr 6Apr 3Mar 31Mar 23
32°FApr 15Apr 9Apr 6Apr 3Mar 31Mar 27Mar 23Mar 19Mar 12
28°FApr 4Mar 31Mar 27Mar 23Mar 19Mar 16Mar 12Mar 6Feb 28
24°FMar 27Mar 20Mar 16Mar 12Mar 8Mar 4Feb 28Feb 23Feb 16
20°FMar 17Mar 11Mar 5Mar 1Feb 26Feb 21Feb 16Feb 9Jan 31
16°FMar 8Feb 28Feb 23Feb 17Feb 11Feb 5Jan 31Jan 25Jan 13

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 10Oct 14Oct 17Oct 20Oct 22Oct 24Oct 27Oct 31Nov 4
32°FOct 18Oct 23Oct 27Oct 30Nov 1Nov 4Nov 6Nov 10Nov 16
28°FOct 30Nov 3Nov 6Nov 9Nov 13Nov 17Nov 21Nov 26Dec 2
24°FNov 8Nov 14Nov 18Nov 23Nov 26Dec 1Dec 4Dec 9Dec 17
20°FNov 18Nov 27Dec 1Dec 7Dec 12Dec 18Dec 24Dec 29Jan 5
16°FDec 2Dec 10Dec 17Dec 23Dec 27Jan 1Jan 4Jan 12Jan 24

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°F215208203199195192187181174
32°F239230225220215212207202195
28°F264255249242238234230224215
24°F290280274269263258252246236
20°F320308301294288283276269259
16°F349337329321314307302294284

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
97% 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
3,803
Cooling degree days, base 65°F
1,819
Growing degree days, base 40°F
7,620
Growing degree days, base 45°F
6,181
Growing degree days, base 50°F
4,883
Growing degree days, base 55°F
3,726
Growing degree days, base 60°F
2,702

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January887015
February689126
March4927118
April20347316
May42174597
June2386834
July0474939
August0433897
September21239667
October18654349
November4906104
December790021

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 12.7 km from Senath. 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 USC00234417 (Kennett Radio Kboa). Public domain.