Normangee climate

Normangee Frost Dates and Growing Season

NOAA 1991-2020 normals for Madisonville, 21.1 km from Normangee, elevation 252 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Madisonville. 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 16 and the first fall freeze around November 11, a growing season of about 240 days.

Median at 36°F
last March 31, first November 2
Median at 32°F
last March 16, first November 11
Median at 28°F
last March 2, first November 20

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 20Apr 12Apr 8Apr 4Mar 31Mar 27Mar 21Mar 16Mar 9
32°FApr 7Mar 31Mar 26Mar 20Mar 16Mar 12Mar 6Mar 1Feb 23
28°FMar 25Mar 17Mar 11Mar 6Mar 2Feb 25Feb 20Feb 9Jan 31
24°FMar 11Mar 3Feb 25Feb 16Feb 8Feb 1Jan 27Jan 18Jan 2
20°FMar 1Feb 14Feb 4Jan 28Jan 22Jan 15Jan 8Dec 31Dec 20
16°FFeb 14Feb 2Jan 25Jan 17Jan 11Jan 6Jan 2Dec 27Dec 15

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 18Oct 24Oct 28Oct 31Nov 2Nov 4Nov 8Nov 12Nov 18
32°FOct 25Oct 31Nov 4Nov 7Nov 11Nov 15Nov 18Nov 23Dec 1
28°FNov 2Nov 8Nov 13Nov 17Nov 20Nov 25Dec 1Dec 5Dec 18
24°FNov 11Nov 19Nov 25Dec 1Dec 5Dec 11Dec 22Jan 1Jan 7
20°FNov 22Dec 2Dec 10Dec 19Dec 27Jan 2Jan 7Jan 15Jan 30
16°FDec 8Dec 16Dec 25Jan 1Jan 4Jan 8Jan 13Jan 21Feb 2

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°F244234228222217212207201193
32°F269259252246240235229222214
28°F305291282274268261254247237
24°F341331320310303294285275262
20°F365365360352343336327315298
16°F365365365365365365360349333

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
97% of years
20°F or colder
76% of years
16°F or colder
37% 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
1,888
Cooling degree days, base 65°F
2,678
Growing degree days, base 40°F
9,971
Growing degree days, base 45°F
8,249
Growing degree days, base 50°F
6,636
Growing degree days, base 55°F
5,160
Growing degree days, base 60°F
3,837

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January4977106
February34515160
March20844324
April71116497
May8287744
June0460910
July05631,028
August05781,043
September1397846
October57166576
November24835273
December45311130

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 21.1 km from Normangee. 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 USC00415477 (Madisonville). Public domain.