Grove City climate

Grove City Frost Dates and Growing Season

NOAA 1991-2020 normals for Litchfield, 11.9 km from Grove City, elevation 1120 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Litchfield. 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 May 6 and the first fall freeze around October 2, a growing season of about 147 days.

Median at 36°F
last May 15, first September 24
Median at 32°F
last May 6, first October 2
Median at 28°F
last April 27, first October 10

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

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 12Sep 16Sep 19Sep 22Sep 24Sep 27Sep 29Oct 2Oct 5
32°FSep 20Sep 24Sep 26Sep 29Oct 2Oct 5Oct 7Oct 10Oct 15
28°FSep 27Oct 1Oct 5Oct 7Oct 10Oct 14Oct 17Oct 20Oct 24
24°FOct 6Oct 11Oct 16Oct 19Oct 21Oct 24Oct 27Nov 1Nov 5
20°FOct 15Oct 21Oct 25Oct 27Oct 31Nov 2Nov 4Nov 9Nov 15
16°FOct 22Oct 29Nov 1Nov 4Nov 7Nov 10Nov 14Nov 17Nov 22

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°F148143138134130126122117111
32°F166159155151147143139134125
28°F186180175171167162158152146
24°F205200195191187183179173166
20°F226219214209205201196192185
16°F241234229224219215211207199

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
8,760
Cooling degree days, base 65°F
494
Growing degree days, base 40°F
4,146
Growing degree days, base 45°F
3,191
Growing degree days, base 50°F
2,343
Growing degree days, base 55°F
1,605
Growing degree days, base 60°F
984

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,70600
February1,42200
March1,17304
April677140
May31425223
June64106493
July13190642
August32131564
September19940308
October613366
November1,04104
December1,50500

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 11.9 km from Grove City. 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 USC00214778 (Litchfield). Public domain.