Page climate

Page Frost Dates and Growing Season

NOAA 1991-2020 normals for Page, 0.9 km from Page, elevation 4270 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Page. 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 27 and the first fall freeze around November 9, a growing season of about 226 days.

Median at 36°F
last April 13, first October 30
Median at 32°F
last March 27, first November 9
Median at 28°F
last March 4, first November 19

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 30Apr 25Apr 20Apr 17Apr 13Apr 10Apr 7Apr 3Mar 29
32°FApr 16Apr 9Apr 4Mar 31Mar 27Mar 21Mar 17Mar 12Mar 8
28°FMar 26Mar 16Mar 11Mar 8Mar 4Mar 1Feb 26Feb 23Feb 16
24°FMar 6Mar 1Feb 25Feb 21Feb 16Feb 12Feb 8Feb 4Jan 28
20°FFeb 23Feb 16Feb 10Feb 5Feb 2Jan 27Jan 21Jan 13Jan 2
16°FFeb 13Feb 5Jan 31Jan 24Jan 17Jan 9Jan 4Dec 28Dec 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 16Oct 21Oct 24Oct 27Oct 30Nov 1Nov 4Nov 7Nov 11
32°FOct 26Oct 31Nov 3Nov 6Nov 9Nov 11Nov 14Nov 17Nov 20
28°FNov 5Nov 10Nov 14Nov 17Nov 19Nov 21Nov 24Nov 26Dec 1
24°FNov 14Nov 20Nov 22Nov 25Nov 28Dec 2Dec 6Dec 10Dec 15
20°FNov 26Dec 1Dec 5Dec 8Dec 12Dec 16Dec 20Dec 26Jan 3
16°FDec 6Dec 11Dec 17Dec 22Dec 27Jan 1Jan 6Jan 15Jan 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°F220213206202197193189184175
32°F250242236231226221216209202
28°F279271266262257253249243233
24°F310300295289285280274268260
20°F347336329321315309303296288
16°F365365359353346340333327314

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
98% of years
16°F or colder
78% 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
4,127
Cooling degree days, base 65°F
1,829
Growing degree days, base 40°F
7,235
Growing degree days, base 45°F
5,860
Growing degree days, base 50°F
4,647
Growing degree days, base 55°F
3,574
Growing degree days, base 60°F
2,636

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January91400
February67604
March475079
April24114242
May66133532
June4388834
July05611,026
August0482947
September15229665
October21322288
November605029
December91900

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 Page. 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 USC00026180 (Page). Public domain.