Mexico climate

Mexico Frost Dates and Growing Season

NOAA 1991-2020 normals for Logansport Cicott St, 24.4 km from Mexico, elevation 600 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Logansport Cicott St. 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 20 and the first fall freeze around October 23, a growing season of about 185 days.

Median at 36°F
last May 1, first October 14
Median at 32°F
last April 20, first October 23
Median at 28°F
last April 8, first November 3

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 16May 11May 7May 4May 1Apr 30Apr 26Apr 22Apr 17
32°FMay 6May 1Apr 27Apr 23Apr 20Apr 18Apr 15Apr 11Apr 6
28°FApr 24Apr 19Apr 15Apr 11Apr 8Apr 5Apr 2Mar 31Mar 25
24°FApr 13Apr 7Apr 3Mar 31Mar 29Mar 25Mar 21Mar 17Mar 11
20°FApr 2Mar 30Mar 24Mar 20Mar 17Mar 13Mar 10Mar 6Feb 28
16°FMar 25Mar 18Mar 13Mar 10Mar 6Mar 3Mar 1Feb 24Feb 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 30Oct 5Oct 8Oct 11Oct 14Oct 16Oct 18Oct 22Oct 25
32°FOct 11Oct 15Oct 18Oct 21Oct 23Oct 26Oct 29Nov 1Nov 5
28°FOct 22Oct 26Oct 30Nov 1Nov 3Nov 6Nov 9Nov 14Nov 19
24°FNov 1Nov 6Nov 9Nov 12Nov 15Nov 19Nov 23Nov 28Dec 3
20°FNov 8Nov 14Nov 19Nov 24Nov 28Dec 1Dec 5Dec 9Dec 17
16°FNov 18Nov 26Nov 30Dec 3Dec 6Dec 10Dec 15Dec 20Dec 26

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°F182176171167164160156151144
32°F203197192188185181177172165
28°F229222217212208203200194188
24°F257248242237232228223218209
20°F280272265260255250245239230
16°F301292286280275269264257249

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
5,952
Cooling degree days, base 65°F
888
Growing degree days, base 40°F
5,448
Growing degree days, base 45°F
4,271
Growing degree days, base 50°F
3,230
Growing degree days, base 55°F
2,317
Growing degree days, base 60°F
1,536

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,22701
February1,01602
March818128
April4506118
May18059355
June25193618
July3278741
August6232691
September83105475
October37613169
November713030
December1,05604

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 24.4 km from Mexico. 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 USC00125117 (Logansport Cicott St). Public domain.