Wagoner climate

Wagoner Frost Dates and Growing Season

NOAA 1991-2020 normals for Wagoner, 0.9 km from Wagoner, elevation 590 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Wagoner. 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 29 and the first fall freeze around November 5, a growing season of about 223 days.

Median at 36°F
last April 10, first October 27
Median at 32°F
last March 29, first November 5
Median at 28°F
last March 15, first November 16

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 25Apr 21Apr 17Apr 13Apr 10Apr 6Apr 3Mar 31Mar 25
32°FApr 14Apr 8Apr 4Apr 1Mar 29Mar 25Mar 20Mar 16Mar 10
28°FApr 3Mar 28Mar 23Mar 19Mar 15Mar 11Mar 6Mar 2Feb 25
24°FMar 22Mar 15Mar 11Mar 7Mar 3Feb 28Feb 24Feb 19Feb 10
20°FMar 13Mar 6Mar 2Feb 26Feb 21Feb 17Feb 11Feb 4Jan 28
16°FMar 6Feb 28Feb 20Feb 13Feb 7Feb 1Jan 27Jan 20Jan 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 12Oct 18Oct 22Oct 25Oct 27Oct 30Nov 1Nov 5Nov 10
32°FOct 21Oct 28Oct 31Nov 3Nov 5Nov 8Nov 12Nov 16Nov 22
28°FOct 31Nov 4Nov 8Nov 12Nov 16Nov 21Nov 26Nov 30Dec 4
24°FNov 7Nov 13Nov 18Nov 24Nov 28Dec 1Dec 4Dec 9Dec 16
20°FNov 19Nov 26Nov 30Dec 4Dec 9Dec 14Dec 19Dec 24Jan 1
16°FNov 29Dec 7Dec 14Dec 19Dec 24Dec 30Jan 3Jan 10Jan 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°F223215211205202197193187181
32°F247238232228223218214209200
28°F272264256250246240233228220
24°F297287279273268263256250241
20°F322313305299293288280273263
16°F351339330324317309302294284

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
3,298
Cooling degree days, base 65°F
2,025
Growing degree days, base 40°F
8,180
Growing degree days, base 45°F
6,654
Growing degree days, base 50°F
5,279
Growing degree days, base 55°F
4,048
Growing degree days, base 60°F
2,961

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January808018
February597143
March40112169
April15951353
May30180615
June1375825
July0535999
August0517982
September15279714
October15265389
November4209138
December717135

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 0.9 km from Wagoner. 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 USC00349247 (Wagoner). Public domain.