Osgood climate

Osgood Frost Dates and Growing Season

NOAA 1991-2020 normals for Greensburg, 29.6 km from Osgood, elevation 937 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Greensburg. 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 26, a growing season of about 194 days.

Median at 36°F
last April 26, first October 16
Median at 32°F
last April 15, first October 26
Median at 28°F
last April 2, first November 5

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 12May 6May 3Apr 30Apr 26Apr 23Apr 20Apr 16Apr 10
32°FMay 2Apr 26Apr 21Apr 18Apr 15Apr 10Apr 7Apr 4Mar 31
28°FApr 19Apr 13Apr 8Apr 5Apr 2Mar 31Mar 29Mar 25Mar 20
24°FApr 6Apr 1Mar 30Mar 27Mar 23Mar 20Mar 16Mar 12Mar 7
20°FMar 28Mar 23Mar 19Mar 15Mar 13Mar 10Mar 5Feb 28Feb 22
16°FMar 19Mar 14Mar 10Mar 6Mar 2Feb 27Feb 22Feb 15Feb 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 6Oct 10Oct 13Oct 16Oct 18Oct 21Oct 24Oct 28
32°FOct 12Oct 18Oct 21Oct 24Oct 26Oct 28Oct 30Nov 2Nov 7
28°FOct 23Oct 28Oct 31Nov 2Nov 5Nov 7Nov 11Nov 14Nov 21
24°FNov 2Nov 6Nov 10Nov 13Nov 16Nov 20Nov 25Nov 30Dec 6
20°FNov 10Nov 15Nov 20Nov 24Nov 29Dec 2Dec 6Dec 11Dec 19
16°FNov 18Nov 26Dec 1Dec 5Dec 9Dec 14Dec 19Dec 24Dec 29

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°F191184180176172168163159151
32°F212205201198194190185179172
28°F238230225220216212208202195
24°F266257250244239234229225218
20°F288279272267262256250244235
16°F310301294287282277271264254

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
5,253
Cooling degree days, base 65°F
1,121
Growing degree days, base 40°F
6,094
Growing degree days, base 45°F
4,836
Growing degree days, base 50°F
3,710
Growing degree days, base 55°F
2,712
Growing degree days, base 60°F
1,849

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,11905
February91408
March721354
April35817187
May12597443
June15238673
July1323787
August4279741
September63138526
October31224225
November649151
December973010

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 29.6 km from Osgood. 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 USC00123547 (Greensburg). Public domain.