Fremont Hills climate

Fremont Hills Frost Dates and Growing Season

NOAA 1991-2020 normals for Ozark, 5.2 km from Fremont Hills, elevation 1134 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Ozark. 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 15 and the first fall freeze around October 23, a growing season of about 189 days.

Median at 36°F
last April 27, first October 14
Median at 32°F
last April 15, first October 23
Median at 28°F
last April 3, 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 10May 6May 2Apr 30Apr 27Apr 24Apr 20Apr 17Apr 12
32°FApr 30Apr 26Apr 22Apr 19Apr 15Apr 12Apr 10Apr 5Mar 31
28°FApr 18Apr 13Apr 9Apr 6Apr 3Mar 31Mar 28Mar 23Mar 18
24°FApr 7Apr 2Mar 30Mar 26Mar 22Mar 19Mar 14Mar 10Mar 4
20°FMar 29Mar 22Mar 17Mar 13Mar 10Mar 6Mar 3Feb 28Feb 22
16°FMar 18Mar 12Mar 7Mar 4Mar 1Feb 26Feb 21Feb 16Feb 8

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 1Oct 5Oct 9Oct 11Oct 14Oct 16Oct 19Oct 22Oct 27
32°FOct 10Oct 14Oct 18Oct 20Oct 23Oct 25Oct 28Oct 31Nov 4
28°FOct 19Oct 23Oct 26Oct 29Nov 1Nov 3Nov 5Nov 10Nov 15
24°FOct 28Nov 1Nov 4Nov 7Nov 11Nov 14Nov 17Nov 21Nov 26
20°FNov 5Nov 10Nov 13Nov 17Nov 21Nov 25Nov 29Dec 2Dec 7
16°FNov 13Nov 20Nov 24Nov 28Dec 2Dec 6Dec 10Dec 17Dec 24

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°F187181175172168164161157151
32°F211202197193189185180175168
28°F234225220215211206202197191
24°F259250245239234229224217210
20°F282272266260256250245239231
16°F305295289283277271265258250

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
4,554
Cooling degree days, base 65°F
1,346
Growing degree days, base 40°F
6,644
Growing degree days, base 45°F
5,296
Growing degree days, base 50°F
4,096
Growing degree days, base 55°F
3,044
Growing degree days, base 60°F
2,127

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January99906
February787015
March589271
April29518218
May9592466
June5260705
July0401866
August1368832
September35173588
October26130266
November599256
December88807

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 5.2 km from Fremont Hills. 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 USC00236452 (Ozark). Public domain.