Hauser climate

Hauser Frost Dates and Growing Season

NOAA 1991-2020 normals for Coeur D'alene, 20 km from Hauser, elevation 2133 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Coeur D'alene. 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 22 and the first fall freeze around October 18, a growing season of about 179 days.

Median at 36°F
last May 7, first October 6
Median at 32°F
last April 22, first October 18
Median at 28°F
last April 1, 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°FMay 21May 15May 12May 9May 7May 4May 1Apr 29Apr 25
32°FMay 6May 2Apr 29Apr 26Apr 22Apr 19Apr 14Apr 10Apr 4
28°FApr 21Apr 13Apr 7Apr 4Apr 1Mar 29Mar 24Mar 20Mar 13
24°FMar 29Mar 22Mar 19Mar 15Mar 12Mar 8Mar 5Mar 1Feb 23
20°FMar 16Mar 12Mar 8Mar 4Mar 1Feb 26Feb 21Feb 14Feb 3
16°FMar 9Mar 3Feb 28Feb 22Feb 15Feb 9Feb 2Jan 22Jan 5

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

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°F171163159154151147142138130
32°F202194188184179175170165158
28°F238229223218214208203197189
24°F274264258252246241236230221
20°F308294285276271265259251240
16°F342328318308301291282273262

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
98% 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
6,317
Cooling degree days, base 65°F
437
Growing degree days, base 40°F
4,210
Growing degree days, base 45°F
3,108
Growing degree days, base 50°F
2,202
Growing degree days, base 55°F
1,457
Growing degree days, base 60°F
864

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,04800
February87900
March78902
April557037
May3178186
June14742348
July26182621
August25165604
September15939335
October510065
November81303
December1,04800

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 20 km from Hauser. 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 USC00101956 (Coeur D'alene). Public domain.