Aguascalientes, Aguascalientes, Mexico

Frost dates for Aguascalientes

The full distribution rather than a single date. Every figure below is a percentile of 30 years of daily minimum temperatures at this location, expressed as the date it fell on.

Median last spring frost

5 February

Half of years are later than this. Not a planting date.

Median first autumn frost

28 November

The far end of the outdoor season.

Frost-free season

296 days

Between those two dates in a median year.

Last and first frost by severity

Read a row as: in this fraction of years, the last frost of spring had already happened by this date. The 90% column is the cautious planting date; the 10% column is the gamble.

Light frost — nights at or below 0°C (32°F). Air temperature reaches freezing. Kills basil, beans and unhardened tomatoes; hardy crops shrug it off.
Frost 1 year in 10 Median 9 years in 10 Earliest Latest
Last of spring 11 Jan 5 Feb 4 Mar 2 Jan 20 Mar
First of autumn 8 Nov 28 Nov 19 Dec 6 Nov 26 Dec
Frost-free days 341 296 249 8 of 30 years saw none at all
Moderate frost — nights at or below -2.2°C (28°F). Damages half-hardy plants and most blossom. This is the threshold that decides a fruit crop.
Frost 1 year in 10 Median 9 years in 10 Earliest Latest
Last of spring 4 Jan 8 Feb 27 Feb 3 Jan 3 Mar
First of autumn 28 Nov 13 Dec 21 Dec 28 Nov 25 Dec
Frost-free days 352 308 274 16 of 30 years saw none at all
Hard frost — nights at or below -4.4°C (24.1°F). Ground freezes and even hardy crops check their growth. Effectively the end of the outdoor year.
Frost 1 year in 10 Median 9 years in 10 Earliest Latest
Last of spring — — — — —
First of autumn 10 Dec 12 Dec 14 Dec 9 Dec 14 Dec
Frost-free days — — — 28 of 30 years saw none at all

Dates in the southern hemisphere are computed on a growing year that starts in July, which is why "last of spring" falls where it should rather than in the middle of the calendar.

Chance of frost, week by week

Jan Mar Apr Jul Sep Oct Dec
Chance of at least one air frost during each week of the year, measured across the full record. The flat stretch in the middle is your frost-free season.

Temperature through the year

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Mean monthly temperature across the record. Months shown in blue average at least one air frost.

Monthly means and average number of frost nights.
Month Mean low Mean high Frost nights
January 4.9°C 20.8°C 1.3
February 5.8°C 23.1°C 0.7
March 7.4°C 25.8°C 0.1
April 9.9°C 28.6°C 0
May 12.7°C 30.3°C 0
June 14.2°C 28.9°C 0
July 13.2°C 27.1°C 0
August 13°C 27.2°C 0
September 12.7°C 26.2°C 0
October 10.5°C 25.4°C 0
November 7.6°C 23.3°C 0.5
December 5.7°C 21.1°C 1

Turn these dates into a planting calendar →

Nearby

Compare with places close by

Lagos de Moreno Zone 10a 69 km Last frost 5 Feb First 28 Nov Guadalupe Zone 9b 99 km Last frost 14 Feb First 27 Nov Zacatecas Zone 9b 103 km Last frost 20 Feb First 29 Nov León de los Aldama Zone 10a 105 km Last frost 17 Jan First 12 Dec San Francisco del Rincón Zone 10a 106 km Last frost 17 Jan First 12 Dec Tepatitlán de Morelos Zone 10a 128 km Last frost 28 Jan First 11 Dec Arandas Zone 10b 131 km Last frost 24 Jan First 20 Dec Silao de la Victoria Zone 10a 137 km Last frost 10 Feb First 11 Dec

Seasonal context

Rainfall and the growing season in Aguascalientes

July has the highest average precipitation (131 mm); April has the lowest (4 mm). Compare this pattern with the planting windows and your water supply.

Jan 12 mm
Feb 17 mm
Mar 10 mm
Apr 4 mm
May 22 mm
Jun 90 mm
Jul 131 mm
Aug 106 mm
Sep 101 mm
Oct 34 mm
Nov 12 mm
Dec 8 mm

During wetter months, check that beds and containers drain after heavy rain. During drier months, plan how you will keep seeds and new transplants watered. Monthly averages can hide long dry spells and intense storms; they do not show soil moisture, humidity or this week's weather.

Source: NASA POWER, corrected MERRA-2 precipitation, 2001–2020. Values are approximate monthly totals, including the water equivalent of snow, from the nearest 0.5° × 0.625° grid cell. This reference period differs from the temperature record. Rainfall provides context and does not change the calculated planting dates. Method and limitations.

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