Woods Cross climate

Woods Cross Frost Dates and Growing Season

NOAA 1991-2020 normals for Bountiful-Val Verda, 1.9 km from Woods Cross, elevation 4540 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Bountiful-Val Verda. 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 24 and the first fall freeze around October 19, a growing season of about 178 days.

Median at 36°F
last May 9, first October 9
Median at 32°F
last April 24, first October 19
Median at 28°F
last April 7, first November 1

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°FJun 1May 23May 17May 12May 9May 5May 2Apr 29Apr 23
32°FMay 14May 6Apr 30Apr 28Apr 24Apr 20Apr 17Apr 12Apr 5
28°FApr 28Apr 22Apr 16Apr 11Apr 7Apr 3Mar 31Mar 24Mar 15
24°FApr 11Apr 4Mar 31Mar 26Mar 19Mar 13Mar 9Mar 5Feb 26
20°FMar 24Mar 13Mar 8Mar 4Mar 1Feb 25Feb 20Feb 15Feb 8
16°FMar 4Feb 27Feb 21Feb 16Feb 12Feb 8Feb 4Jan 31Jan 20

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°FSep 28Oct 1Oct 4Oct 6Oct 9Oct 12Oct 15Oct 18Oct 22
32°FOct 5Oct 9Oct 13Oct 17Oct 19Oct 23Oct 26Oct 31Nov 4
28°FOct 16Oct 22Oct 26Oct 30Nov 1Nov 4Nov 8Nov 12Nov 17
24°FOct 27Nov 1Nov 5Nov 9Nov 12Nov 16Nov 19Nov 23Nov 27
20°FNov 5Nov 11Nov 15Nov 19Nov 22Nov 25Nov 29Dec 3Dec 10
16°FNov 14Nov 20Nov 25Nov 29Dec 2Dec 7Dec 12Dec 18Dec 27

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°F173166161156152147143136127
32°F201194188183178173169163155
28°F233225218213208202197190181
24°F267257250244238232227220211
20°F296287279273267262256249238
16°F325315307301294288282275266

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
100% 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
5,725
Cooling degree days, base 65°F
989
Growing degree days, base 40°F
5,388
Growing degree days, base 45°F
4,194
Growing degree days, base 50°F
3,174
Growing degree days, base 55°F
2,309
Growing degree days, base 60°F
1,587

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,08600
February85802
March682025
April489387
May23636288
June63159547
July4375837
August6317776
September9293457
October4075140
November749015
December1,05401

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 1.9 km from Woods Cross. 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 USC00420820 (Bountiful-Val Verda). Public domain.