Providence climate

Providence Frost Dates and Growing Season

NOAA 1991-2020 normals for Logan Utah St Univ, 4.5 km from Providence, elevation 4790 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Logan Utah St Univ. 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 30 and the first fall freeze around October 16, a growing season of about 166 days.

Median at 36°F
last May 17, first October 5
Median at 32°F
last April 30, first October 16
Median at 28°F
last April 15, first October 27

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 7Jun 2May 28May 22May 17May 13May 9May 4Apr 30
32°FMay 19May 11May 6May 2Apr 30Apr 26Apr 22Apr 19Apr 14
28°FMay 2Apr 26Apr 21Apr 18Apr 15Apr 11Apr 7Apr 2Mar 28
24°FApr 17Apr 10Apr 6Apr 2Mar 31Mar 27Mar 20Mar 15Mar 10
20°FApr 2Mar 29Mar 23Mar 17Mar 13Mar 10Mar 7Mar 3Feb 25
16°FMar 20Mar 13Mar 9Mar 6Mar 3Feb 28Feb 25Feb 19Feb 12

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 22Sep 26Sep 29Oct 2Oct 5Oct 7Oct 10Oct 14Oct 18
32°FOct 1Oct 6Oct 10Oct 13Oct 16Oct 19Oct 22Oct 25Oct 29
28°FOct 12Oct 17Oct 21Oct 24Oct 27Oct 30Nov 1Nov 5Nov 11
24°FOct 23Oct 28Nov 1Nov 3Nov 6Nov 10Nov 13Nov 17Nov 22
20°FOct 31Nov 5Nov 9Nov 12Nov 16Nov 19Nov 22Nov 25Nov 29
16°FNov 7Nov 13Nov 17Nov 20Nov 24Nov 27Nov 30Dec 4Dec 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°F162154149144139135130123114
32°F188182175170166163157152143
28°F219211205201196191186181172
24°F247238232226222217211206197
20°F269262256251246241235228219
16°F291282275270265261256251241

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
6,693
Cooling degree days, base 65°F
720
Growing degree days, base 40°F
4,716
Growing degree days, base 45°F
3,627
Growing degree days, base 50°F
2,690
Growing degree days, base 55°F
1,903
Growing degree days, base 60°F
1,249

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,24300
February1,00800
March806010
April563151
May30615215
June9794451
July8293750
August11252705
September13064395
October4762104
November84308
December1,20100

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 4.5 km from Providence. 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 USC00425186 (Logan Utah St Univ). Public domain.