Springview climate

Springview Frost Dates and Growing Season

NOAA 1991-2020 normals for Springview 2NW, 2.9 km from Springview, elevation 2388 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Springview 2NW. 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 May 10 and the first fall freeze around October 1, a growing season of about 143 days.

Median at 36°F
last May 19, first September 24
Median at 32°F
last May 10, first October 1
Median at 28°F
last May 1, first October 9

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 2May 29May 25May 22May 19May 17May 14May 11May 7
32°FMay 23May 19May 16May 12May 10May 7May 5May 2Apr 28
28°FMay 12May 8May 5May 3May 1Apr 30Apr 26Apr 22Apr 17
24°FMay 5May 1Apr 28Apr 24Apr 20Apr 17Apr 14Apr 11Apr 6
20°FApr 26Apr 21Apr 17Apr 14Apr 10Apr 7Apr 4Apr 1Mar 26
16°FApr 19Apr 13Apr 9Apr 6Apr 3Mar 31Mar 27Mar 21Mar 15

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 10Sep 15Sep 18Sep 21Sep 24Sep 26Sep 29Oct 1Oct 6
32°FSep 18Sep 23Sep 26Sep 29Oct 1Oct 3Oct 6Oct 10Oct 14
28°FSep 27Oct 1Oct 3Oct 6Oct 9Oct 12Oct 15Oct 17Oct 22
24°FOct 4Oct 9Oct 13Oct 16Oct 18Oct 20Oct 23Oct 26Oct 30
20°FOct 13Oct 18Oct 21Oct 23Oct 26Oct 29Nov 1Nov 4Nov 9
16°FOct 19Oct 24Oct 28Oct 30Nov 2Nov 5Nov 9Nov 12Nov 18

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°F143137133129125122117111104
32°F160154150146143139136131124
28°F179173168164161157153149143
24°F199194187183179175170165159
20°F219212207203198194190185177
16°F237230224219215210206201192

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
7,225
Cooling degree days, base 65°F
750
Growing degree days, base 40°F
4,769
Growing degree days, base 45°F
3,705
Growing degree days, base 50°F
2,770
Growing degree days, base 55°F
1,968
Growing degree days, base 60°F
1,292

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,34100
February1,13002
March930019
April607161
May28927246
June62132522
July10287742
August23217659
September14880394
October5236110
November903015
December1,26000

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 2.9 km from Springview. 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 USC00258090 (Springview 2NW). Public domain.