Teec Nos Pos climate

Teec Nos Pos Frost Dates and Growing Season

NOAA 1991-2020 normals for Teec Nos Pos, 0.4 km from Teec Nos Pos, elevation 5290 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Teec Nos Pos. 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 11 and the first fall freeze around November 1, a growing season of about 200 days.

Median at 36°F
last April 27, first October 21
Median at 32°F
last April 11, first November 1
Median at 28°F
last March 26, first November 9

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 17May 10May 4May 1Apr 27Apr 24Apr 20Apr 15Apr 10
32°FMay 2Apr 24Apr 19Apr 15Apr 11Apr 7Apr 4Mar 31Mar 24
28°FApr 13Apr 7Apr 2Mar 30Mar 26Mar 20Mar 16Mar 11Mar 4
24°FMar 31Mar 22Mar 15Mar 10Mar 6Mar 2Feb 27Feb 21Feb 14
20°FMar 10Mar 4Feb 28Feb 23Feb 17Feb 12Feb 6Feb 1Jan 25
16°FFeb 25Feb 15Feb 8Feb 2Jan 29Jan 24Jan 17Jan 9Jan 1

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 5Oct 10Oct 14Oct 18Oct 21Oct 23Oct 26Oct 30Nov 2
32°FOct 16Oct 22Oct 25Oct 29Nov 1Nov 3Nov 5Nov 8Nov 12
28°FOct 27Nov 1Nov 4Nov 7Nov 9Nov 11Nov 14Nov 17Nov 21
24°FNov 6Nov 10Nov 13Nov 16Nov 18Nov 20Nov 23Nov 27Dec 1
20°FNov 15Nov 19Nov 22Nov 25Nov 28Dec 1Dec 4Dec 8Dec 14
16°FNov 22Nov 29Dec 2Dec 6Dec 9Dec 12Dec 17Dec 20Dec 29

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°F196189183178174169164159151
32°F222215210205200195189183173
28°F253244237232226222216211201
24°F280274268262257252246239229
20°F312302295290284278273267258
16°F344334328321314309302295284

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
99% 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
4,326
Cooling degree days, base 65°F
1,521
Growing degree days, base 40°F
6,824
Growing degree days, base 45°F
5,452
Growing degree days, base 50°F
4,243
Growing degree days, base 55°F
3,193
Growing degree days, base 60°F
2,286

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January94701
February69205
March510058
April2778205
May8991470
June5332777
July0494959
August0403868
September21180609
October23512259
November606033
December94401

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 0.4 km from Teec Nos Pos. 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 USC00028468 (Teec Nos Pos). Public domain.