Farina climate

Farina Frost Dates and Growing Season

NOAA 1991-2020 normals for Flora 5 Nw, 21.9 km from Farina, elevation 500 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Flora 5 Nw. 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 23, a growing season of about 196 days.

Median at 36°F
last April 23, first October 13
Median at 32°F
last April 10, first October 23
Median at 28°F
last March 31, first November 2

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 8May 2Apr 29Apr 26Apr 23Apr 19Apr 16Apr 13Apr 7
32°FApr 26Apr 21Apr 17Apr 13Apr 10Apr 7Apr 4Mar 31Mar 26
28°FApr 16Apr 9Apr 5Apr 2Mar 31Mar 29Mar 25Mar 19Mar 13
24°FApr 4Mar 31Mar 27Mar 23Mar 19Mar 16Mar 12Mar 6Feb 28
20°FMar 26Mar 20Mar 15Mar 12Mar 9Mar 5Mar 1Feb 25Feb 16
16°FMar 18Mar 12Mar 8Mar 4Feb 28Feb 24Feb 18Feb 11Feb 3

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 24Oct 1Oct 6Oct 10Oct 13Oct 16Oct 19Oct 22Oct 26
32°FOct 7Oct 13Oct 17Oct 20Oct 23Oct 26Oct 28Nov 1Nov 5
28°FOct 18Oct 24Oct 28Oct 31Nov 2Nov 5Nov 8Nov 12Nov 17
24°FNov 1Nov 4Nov 8Nov 11Nov 14Nov 18Nov 22Nov 26Dec 3
20°FNov 9Nov 14Nov 18Nov 23Nov 27Dec 1Dec 4Dec 8Dec 15
16°FNov 19Nov 26Nov 30Dec 4Dec 7Dec 11Dec 16Dec 22Dec 28

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°F193186181176172167164158149
32°F215209204200196191187180172
28°F242234228221217213208202196
24°F268258251246241236230225216
20°F290281275268263257251245237
16°F314303296291284278273266256

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
4,568
Cooling degree days, base 65°F
1,340
Growing degree days, base 40°F
6,706
Growing degree days, base 45°F
5,366
Growing degree days, base 50°F
4,159
Growing degree days, base 55°F
3,083
Growing degree days, base 60°F
2,141

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,03107
February805014
March592582
April27131250
May79116503
June6285729
July0375840
August2326789
September43165572
October24736283
November582377
December912013

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 21.9 km from Farina. 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 USC00113109 (Flora 5 Nw). Public domain.