Frisco climate

Frisco Frost Dates and Growing Season

NOAA 1991-2020 normals for Richardson, 18.8 km from Frisco, elevation 678 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Richardson. 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 7 and the first fall freeze around November 21, a growing season of about 259 days.

Median at 36°F
last March 21, first November 10
Median at 32°F
last March 7, first November 21
Median at 28°F
last February 24, first December 4

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 11Apr 4Mar 31Mar 26Mar 21Mar 16Mar 12Mar 7Mar 2
32°FMar 29Mar 19Mar 14Mar 10Mar 7Mar 3Feb 28Feb 25Feb 18
28°FMar 12Mar 7Mar 3Feb 28Feb 24Feb 19Feb 12Feb 6Jan 27
24°FMar 4Feb 26Feb 18Feb 12Feb 7Jan 31Jan 25Jan 17Jan 4
20°FFeb 23Feb 13Feb 7Jan 30Jan 23Jan 17Jan 8Dec 31Dec 20
16°FFeb 16Feb 8Feb 2Jan 25Jan 19Jan 13Jan 5Dec 31Dec 19

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 23Oct 30Nov 2Nov 6Nov 10Nov 13Nov 17Nov 21Nov 27
32°FNov 2Nov 9Nov 13Nov 17Nov 21Nov 24Nov 29Dec 3Dec 9
28°FNov 14Nov 20Nov 25Nov 30Dec 4Dec 7Dec 11Dec 18Dec 26
24°FNov 26Dec 3Dec 10Dec 16Dec 23Dec 28Jan 2Jan 8Jan 19
20°FDec 6Dec 15Dec 23Dec 29Jan 2Jan 8Jan 15Jan 22Feb 5
16°FDec 16Dec 24Dec 31Jan 4Jan 11Jan 18Jan 23Feb 1Feb 11

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°F258251244239233227222215205
32°F285276270265259253248240232
28°F318307299293288280274267256
24°F355343334327320314305297286
20°F365365365358349341333322311
16°F365365365365365365364350333

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
96% of years
20°F or colder
70% of years
16°F or colder
33% 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
2,294
Cooling degree days, base 65°F
2,612
Growing degree days, base 40°F
9,566
Growing degree days, base 45°F
7,903
Growing degree days, base 50°F
6,359
Growing degree days, base 55°F
4,953
Growing degree days, base 60°F
3,700

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January595264
February4336119
March24731284
April9093457
May13264716
June0468918
July06141,079
August06091,074
September3369816
October78134524
November29520223
December542485

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 18.8 km from Frisco. 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 USC00417588 (Richardson). Public domain.