Celina climate

Celina Frost Dates and Growing Season

NOAA 1991-2020 normals for Celina 3 Ne, 3.6 km from Celina, elevation 866 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Celina 3 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 April 27 and the first fall freeze around October 19, a growing season of about 175 days.

Median at 36°F
last May 5, first October 5
Median at 32°F
last April 27, first October 19
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 20May 15May 10May 7May 5May 2Apr 30Apr 27Apr 22
32°FMay 10May 6May 2Apr 29Apr 27Apr 23Apr 20Apr 17Apr 12
28°FMay 2Apr 25Apr 21Apr 18Apr 15Apr 12Apr 9Apr 5Apr 1
24°FApr 18Apr 14Apr 9Apr 5Apr 2Mar 31Mar 28Mar 24Mar 18
20°FApr 7Apr 2Mar 30Mar 27Mar 24Mar 20Mar 18Mar 13Mar 7
16°FMar 30Mar 24Mar 20Mar 17Mar 14Mar 10Mar 6Mar 1Feb 21

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 22Sep 27Sep 30Oct 3Oct 5Oct 9Oct 12Oct 14Oct 19
32°FOct 3Oct 9Oct 13Oct 16Oct 19Oct 21Oct 24Oct 27Nov 1
28°FOct 17Oct 22Oct 25Oct 28Oct 31Nov 2Nov 5Nov 7Nov 13
24°FOct 29Nov 2Nov 5Nov 7Nov 11Nov 14Nov 17Nov 22Nov 27
20°FNov 7Nov 11Nov 15Nov 18Nov 22Nov 26Nov 29Dec 4Dec 11
16°FNov 13Nov 19Nov 25Nov 28Dec 1Dec 5Dec 9Dec 16Dec 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°F171165160157153149145140132
32°F195188183180175171166162154
28°F218212207203199195190185179
24°F245237231227222218214208201
20°F269261253249243238233228222
16°F290280274269264258253248238

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
5,789
Cooling degree days, base 65°F
865
Growing degree days, base 40°F
5,537
Growing degree days, base 45°F
4,341
Growing degree days, base 50°F
3,272
Growing degree days, base 55°F
2,334
Growing degree days, base 60°F
1,528

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,20302
February98804
March799134
April4239137
May16070383
June24191616
July4262724
August10213668
September83105474
October34914192
November702036
December1,04504

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 3.6 km from Celina. 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 USC00331390 (Celina 3 Ne). Public domain.