Muskogee County climate

Muskogee County Frost Dates and Growing Season

NOAA 1991-2020 normals for Muskogee Davis Fld, 4.8 km from Muskogee County, elevation 610 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Muskogee Davis Fld. 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 2, a growing season of about 216 days.

Median at 36°F
last April 13, first October 24
Median at 32°F
last April 2, first November 2
Median at 28°F
last March 18, first November 12

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 28Apr 24Apr 20Apr 17Apr 13Apr 11Apr 7Apr 2Mar 27
32°FApr 20Apr 13Apr 9Apr 5Apr 2Mar 30Mar 25Mar 20Mar 13
28°FApr 6Apr 2Mar 28Mar 23Mar 18Mar 14Mar 11Mar 5Feb 28
24°FMar 23Mar 15Mar 11Mar 8Mar 5Mar 2Feb 27Feb 22Feb 16
20°FMar 11Mar 6Mar 2Feb 27Feb 23Feb 19Feb 14Feb 7Jan 29
16°FMar 5Feb 27Feb 20Feb 15Feb 9Feb 1Jan 27Jan 20Jan 5

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 16Oct 19Oct 22Oct 24Oct 27Oct 30Nov 1Nov 6
32°FOct 20Oct 24Oct 28Oct 31Nov 2Nov 5Nov 8Nov 12Nov 17
28°FOct 28Nov 2Nov 6Nov 8Nov 12Nov 15Nov 20Nov 25Dec 1
24°FNov 5Nov 10Nov 15Nov 19Nov 24Nov 29Dec 1Dec 6Dec 12
20°FNov 16Nov 24Nov 29Dec 1Dec 6Dec 9Dec 14Dec 20Dec 30
16°FNov 27Dec 3Dec 8Dec 14Dec 20Dec 27Jan 2Jan 9Jan 19

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°F216207202198194191186181175
32°F237229224220216211206201194
28°F263256249244239233228222213
24°F289280275269263258252245236
20°F317307300294288282277269258
16°F349338330321315308302293282

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
96% 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
3,412
Cooling degree days, base 65°F
1,920
Growing degree days, base 40°F
7,991
Growing degree days, base 45°F
6,479
Growing degree days, base 50°F
5,116
Growing degree days, base 55°F
3,901
Growing degree days, base 60°F
2,835

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January811022
February612246
March41012157
April18144328
May42155579
June1362811
July0515979
August0494959
September15261696
October16168384
November4446124
December735132

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 4.8 km from Muskogee County. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

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Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USW00093953 (Muskogee Davis Fld). Public domain.