Groveport climate

Groveport Frost Dates and Growing Season

NOAA 1991-2020 normals for Columbus-Valley Crossing, 4.3 km from Groveport, elevation 760 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Columbus-Valley Crossing. 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 23 and the first fall freeze around October 19, a growing season of about 177 days.

Median at 36°F
last May 2, first October 8
Median at 32°F
last April 23, first October 19
Median at 28°F
last April 12, first October 30

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 17May 12May 8May 5May 2Apr 30Apr 28Apr 25Apr 20
32°FMay 8May 3Apr 29Apr 26Apr 23Apr 21Apr 18Apr 15Apr 11
28°FApr 25Apr 21Apr 18Apr 15Apr 12Apr 9Apr 6Apr 3Mar 31
24°FApr 14Apr 9Apr 5Apr 2Mar 31Mar 29Mar 25Mar 21Mar 16
20°FApr 3Mar 30Mar 27Mar 24Mar 21Mar 19Mar 16Mar 11Mar 5
16°FMar 28Mar 22Mar 19Mar 15Mar 11Mar 8Mar 4Mar 1Feb 24

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 25Sep 30Oct 3Oct 6Oct 8Oct 11Oct 14Oct 18Oct 22
32°FOct 6Oct 10Oct 13Oct 16Oct 19Oct 21Oct 24Oct 28Nov 1
28°FOct 16Oct 20Oct 24Oct 27Oct 30Nov 1Nov 4Nov 7Nov 12
24°FOct 27Nov 1Nov 3Nov 5Nov 9Nov 12Nov 15Nov 19Nov 25
20°FNov 4Nov 10Nov 13Nov 17Nov 21Nov 25Nov 29Dec 3Dec 10
16°FNov 13Nov 20Nov 25Nov 30Dec 2Dec 6Dec 12Dec 18Dec 25

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°F176170165162159155151146138
32°F196189184181177173169164158
28°F218212207204200196193188181
24°F243235230227222219215210204
20°F268260254249244240235230222
16°F293285278272267261256250242

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
5,358
Cooling degree days, base 65°F
1,017
Growing degree days, base 40°F
5,886
Growing degree days, base 45°F
4,640
Growing degree days, base 50°F
3,529
Growing degree days, base 55°F
2,554
Growing degree days, base 60°F
1,714

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,13304
February93005
March751139
April38810154
May13079417
June16220654
July1317781
August3260722
September58116509
October33115195
November659040
December96107

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 4.3 km from Groveport. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00331783 (Columbus-Valley Crossing). Public domain.