Lakeside climate

Lakeside Frost Dates and Growing Season

NOAA 1991-2020 normals for Ashland Hanover CO Muni AP, 11.7 km from Lakeside, elevation 205 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Ashland Hanover CO Muni AP. 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 10 and the first fall freeze around October 31, a growing season of about 202 days.

Median at 36°F
last April 23, first October 21
Median at 32°F
last April 10, first October 31
Median at 28°F
last March 28, first November 11

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 10May 4Apr 30Apr 27Apr 23Apr 21Apr 17Apr 13Apr 8
32°FApr 29Apr 21Apr 16Apr 13Apr 10Apr 6Apr 3Mar 31Mar 27
28°FApr 11Apr 6Apr 2Mar 31Mar 28Mar 26Mar 22Mar 18Mar 12
24°FMar 31Mar 27Mar 23Mar 19Mar 16Mar 12Mar 7Mar 3Feb 25
20°FMar 22Mar 15Mar 10Mar 7Mar 3Feb 28Feb 24Feb 17Feb 8
16°FMar 12Mar 5Feb 28Feb 24Feb 17Feb 11Feb 4Jan 30Jan 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 8Oct 12Oct 15Oct 18Oct 21Oct 23Oct 26Oct 29Nov 2
32°FOct 17Oct 22Oct 25Oct 28Oct 31Nov 2Nov 5Nov 8Nov 13
28°FOct 29Nov 2Nov 5Nov 8Nov 11Nov 15Nov 18Nov 22Nov 30
24°FNov 7Nov 13Nov 17Nov 21Nov 25Nov 29Dec 2Dec 6Dec 16
20°FNov 21Nov 29Dec 2Dec 6Dec 10Dec 14Dec 21Dec 29Jan 5
16°FDec 4Dec 11Dec 17Dec 23Dec 28Jan 1Jan 7Jan 13Jan 21

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°F200194189185181177173168161
32°F223216211206202199194190183
28°F252244237231227222218213206
24°F281273267262256251245238229
20°F313304297290285279272265253
16°F339331324317311306300292283

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
3,957
Cooling degree days, base 65°F
1,420
Growing degree days, base 40°F
7,019
Growing degree days, base 45°F
5,586
Growing degree days, base 50°F
4,310
Growing degree days, base 55°F
3,196
Growing degree days, base 60°F
2,231

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January851020
February695127
March550691
April26436252
May87113492
June8278720
July0411876
August1357821
September30181602
October22735290
November496289
December749132

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 11.7 km from Lakeside. 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 USW00093775 (Ashland Hanover CO Muni AP). Public domain.