Galion climate

Galion Frost Dates and Growing Season

NOAA 1991-2020 normals for Galion Wtr Wks, 1.5 km from Galion, elevation 1170 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Galion Wtr Wks. 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 26 and the first fall freeze around October 20, a growing season of about 176 days.

Median at 36°F
last May 5, first October 9
Median at 32°F
last April 26, first October 20
Median at 28°F
last April 15, first October 31

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 22May 17May 12May 9May 5May 3Apr 30Apr 26Apr 21
32°FMay 11May 6May 2Apr 29Apr 26Apr 23Apr 19Apr 16Apr 11
28°FMay 1Apr 25Apr 20Apr 17Apr 15Apr 11Apr 7Apr 4Mar 31
24°FApr 18Apr 13Apr 8Apr 5Apr 3Apr 1Mar 29Mar 25Mar 20
20°FApr 8Apr 2Mar 31Mar 28Mar 24Mar 21Mar 18Mar 14Mar 9
16°FMar 31Mar 26Mar 21Mar 17Mar 15Mar 11Mar 8Mar 4Feb 25

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 28Oct 1Oct 4Oct 6Oct 9Oct 11Oct 14Oct 17Oct 22
32°FOct 7Oct 11Oct 14Oct 18Oct 20Oct 23Oct 25Oct 28Nov 2
28°FOct 17Oct 22Oct 25Oct 28Oct 31Nov 2Nov 5Nov 9Nov 15
24°FOct 29Nov 1Nov 4Nov 8Nov 11Nov 15Nov 18Nov 23Dec 1
20°FNov 6Nov 12Nov 16Nov 20Nov 25Nov 29Dec 2Dec 6Dec 13
16°FNov 16Nov 23Nov 28Dec 1Dec 5Dec 9Dec 14Dec 20Dec 26

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°F173166162159155152147143137
32°F196189185180176172168163157
28°F218211206201197194189185178
24°F244236230225221216212206199
20°F269261254249244240235230221
16°F291284277271266261256250241

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
6,142
Cooling degree days, base 65°F
759
Growing degree days, base 40°F
5,206
Growing degree days, base 45°F
4,049
Growing degree days, base 50°F
3,028
Growing degree days, base 55°F
2,138
Growing degree days, base 60°F
1,378

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,22402
February1,04604
March865128
April4836111
May20551329
June32160578
July8233690
August10207662
September10388438
October40513155
November729028
December1,03204

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 1.5 km from Galion. 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 USC00333021 (Galion Wtr Wks). Public domain.