Hooven climate

Hooven Frost Dates and Growing Season

NOAA 1991-2020 normals for Cincinnati-Fernbank, 8.7 km from Hooven, elevation 500 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Cincinnati-Fernbank. 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 13 and the first fall freeze around October 31, a growing season of about 197 days.

Median at 36°F
last April 26, first October 20
Median at 32°F
last April 13, first October 31
Median at 28°F
last March 31, first November 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 13May 7May 3Apr 29Apr 26Apr 23Apr 20Apr 16Apr 12
32°FMay 2Apr 24Apr 20Apr 16Apr 13Apr 10Apr 7Apr 3Mar 31
28°FApr 15Apr 9Apr 5Apr 3Mar 31Mar 29Mar 26Mar 22Mar 16
24°FApr 3Mar 30Mar 26Mar 23Mar 20Mar 17Mar 13Mar 8Mar 2
20°FMar 25Mar 20Mar 16Mar 12Mar 8Mar 4Mar 1Feb 24Feb 15
16°FMar 17Mar 11Mar 6Mar 2Feb 28Feb 23Feb 17Feb 10Feb 2

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 7Oct 11Oct 14Oct 17Oct 20Oct 22Oct 24Oct 27Nov 1
32°FOct 17Oct 22Oct 25Oct 28Oct 31Nov 1Nov 4Nov 7Nov 13
28°FOct 30Nov 1Nov 4Nov 7Nov 10Nov 13Nov 16Nov 22Nov 29
24°FNov 6Nov 11Nov 15Nov 19Nov 24Nov 28Dec 1Dec 6Dec 12
20°FNov 17Nov 24Nov 28Dec 1Dec 5Dec 9Dec 16Dec 21Dec 26
16°FNov 29Dec 4Dec 10Dec 15Dec 20Dec 23Dec 28Jan 1Jan 10

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°F194188182178174170165161155
32°F219211206201197192187182175
28°F248239234229225220216210202
24°F275266261255251245240234227
20°F300290283278272266261254246
16°F323314306301296291284277268

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
4,773
Cooling degree days, base 65°F
1,176
Growing degree days, base 40°F
6,347
Growing degree days, base 45°F
5,026
Growing degree days, base 50°F
3,853
Growing degree days, base 55°F
2,820
Growing degree days, base 60°F
1,926

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,02109
February841010
March664362
April33717194
May11489444
June13238675
July0344809
August2313776
September47149552
October27822241
November580165
December877014

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 8.7 km from Hooven. 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 USC00331550 (Cincinnati-Fernbank). Public domain.