Konawa climate

Konawa Frost Dates and Growing Season

NOAA 1991-2020 normals for Ada, 20.3 km from Konawa, elevation 1015 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Ada. 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 2 and the first fall freeze around November 4, a growing season of about 217 days.

Median at 36°F
last April 12, first October 26
Median at 32°F
last April 2, first November 4
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 27Apr 23Apr 19Apr 15Apr 12Apr 9Apr 5Apr 2Mar 27
32°FApr 18Apr 11Apr 8Apr 5Apr 2Mar 30Mar 26Mar 21Mar 14
28°FApr 7Apr 2Mar 29Mar 24Mar 19Mar 15Mar 11Mar 6Feb 28
24°FMar 26Mar 18Mar 13Mar 10Mar 6Mar 3Feb 28Feb 23Feb 15
20°FMar 14Mar 9Mar 4Mar 1Feb 25Feb 21Feb 15Feb 9Jan 31
16°FMar 6Feb 28Feb 22Feb 15Feb 9Feb 3Jan 30Jan 24Jan 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 11Oct 17Oct 20Oct 23Oct 26Oct 28Oct 31Nov 4Nov 9
32°FOct 20Oct 26Oct 30Nov 1Nov 4Nov 7Nov 11Nov 15Nov 21
28°FOct 28Nov 2Nov 6Nov 10Nov 13Nov 16Nov 21Nov 26Dec 1
24°FNov 4Nov 12Nov 16Nov 20Nov 25Nov 29Dec 3Dec 7Dec 14
20°FNov 16Nov 24Nov 30Dec 3Dec 8Dec 13Dec 19Dec 25Jan 1
16°FNov 29Dec 6Dec 13Dec 18Dec 24Dec 30Jan 5Jan 11Jan 23

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°F217209204200196192187182175
32°F239232226221217212207201194
28°F265256251245240234228221212
24°F290281274268263258252246233
20°F319307299293286280275267259
16°F351338330322315308300293281

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
3,258
Cooling degree days, base 65°F
2,038
Growing degree days, base 40°F
8,217
Growing degree days, base 45°F
6,673
Growing degree days, base 50°F
5,278
Growing degree days, base 55°F
4,039
Growing degree days, base 60°F
2,960

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January792018
February585145
March3986157
April17036327
May30168603
June1397846
July05531,018
August0524989
September17281714
October14265396
November4148135
December710030

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 20.3 km from Konawa. 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 USC00340017 (Ada). Public domain.