Quinby climate

Quinby Frost Dates and Growing Season

NOAA 1991-2020 normals for Florence 8 Ne, 6.3 km from Quinby, elevation 120 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Florence 8 Ne. 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 March 22 and the first fall freeze around November 10, a growing season of about 235 days.

Median at 36°F
last April 4, first November 1
Median at 32°F
last March 22, first November 10
Median at 28°F
last March 6, first November 24

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°FApr 18Apr 13Apr 9Apr 6Apr 4Apr 1Mar 28Mar 23Mar 18
32°FApr 8Apr 3Mar 31Mar 27Mar 22Mar 18Mar 14Mar 8Feb 28
28°FMar 29Mar 21Mar 16Mar 11Mar 6Mar 3Feb 27Feb 20Feb 10
24°FMar 14Mar 5Feb 28Feb 23Feb 16Feb 10Feb 4Jan 31Jan 21
20°FFeb 28Feb 17Feb 8Feb 1Jan 29Jan 23Jan 17Jan 11Dec 31
16°FFeb 6Jan 31Jan 27Jan 22Jan 18Jan 14Jan 10Jan 3Dec 28

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 21Oct 25Oct 28Oct 31Nov 1Nov 4Nov 6Nov 10Nov 14
32°FOct 31Nov 2Nov 5Nov 7Nov 10Nov 13Nov 16Nov 22Dec 1
28°FNov 6Nov 11Nov 15Nov 18Nov 24Nov 29Dec 2Dec 7Dec 19
24°FNov 15Nov 23Nov 30Dec 3Dec 8Dec 16Dec 27Jan 4Jan 13
20°FDec 1Dec 8Dec 19Dec 26Jan 1Jan 6Jan 11Jan 17Jan 29
16°FDec 18Dec 28Jan 1Jan 7Jan 11Jan 14Jan 18Jan 22Jan 31

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°F235227221217213209205199193
32°F263252246241235231226220213
28°F295286277269262256249242234
24°F334324312305298291284275264
20°F365359348340334328319310301
16°F365365365365365359348338328

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
99% of years
20°F or colder
87% of years
16°F or colder
52% 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
2,487
Cooling degree days, base 65°F
2,238
Growing degree days, base 40°F
8,974
Growing degree days, base 45°F
7,320
Growing degree days, base 50°F
5,809
Growing degree days, base 55°F
4,458
Growing degree days, base 60°F
3,265

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January605263
February473376
March31321225
April11880417
May21234677
June1424873
July05471,012
August0490955
September5317762
October9997467
November32518193
December528689

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 6.3 km from Quinby. 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 USC00383111 (Florence 8 Ne). Public domain.