Passive solar house by Denise Aughtman in San Miguel de Allende Mexico (C) Daniel Friedman

Weather Conditions in San Miguel de Allende, Guanajuato, Mexico

  • Average temperature by month in San Miguel de Allende, Mexico
  • Average rainfall by month in San Miguel de Allende, Mexico
  • What is the average temperature in San Miguel de Allende? How much does it rain?
  • Suitability of San Miguel de Allende weather conditions for passive solar design

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San Miguel de Allende weather conditions: This article describes average weather conditions: average temperature and average rainfall by month for San Miguel de Allende, in Guanajuato, Mexico. Our weather table gives the temperature high and low range and average rainfrall for each month of the year.

Our page top photo shows windows admitting morning solar gain in this nearly-balanced-energy passive solar home in San Miguel de Allende, Guanajuato, Mexico. More about this home is at PASSIVE SOLAR HOME, LOW COST.

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Average Temperatures and Rainfall in San Miguel de Allende, Mexico

San Miguel de Allende is comfortable all year round, but can be chilly at night and can be as warm as the mid 80's during the day. Most days are very sunny, and even on most rainy days, the sun will shine brightly for a good part of the day. During the rainy season, afternoon rains are quite heavy. Snow and ice are extremely rare, as are traffic lights and neon signs.

We collected the average weather conditions for San Miguel de Allende (below) to explain the relation between temperature swings and the need to heat or cool a PASSIVE SOLAR HOME, LOW COST.

Simply put, when outdoor temperatures vary roughly the same amount above and below the human comfort zone (65 degF to 70 degF) then in principle, a passive solar home should need almost no additional energy source to provide heating and cooling.

Our table of average weather conditions in San Miguel de Allende, in Guanajuato, Mexico (below) shows that in that climate, while daytime highs are not much above the comfort point of 78 degF., nighttime lows average 26 degF below that number: solar heating of a thermal mass in the building is wanted for night time indoor comfort.

Readers should also see SOLAR ENERGY SYSTEMS our solar energy home page, PASSIVE SOLAR DESIGN METHOD, and SOLAR HOUSE EVALUATION. Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution. At THERMAL MASS in BUILDINGS we describe a second home in this climate and we report that its typical morning low temperature in the coldest months falls to about 61 degF inside that home when no heating source is provided other than the daytime-warmed thermal mass of the building's masonry walls and roof.

Weather Conditions, San Miguel de Allende, Guanajuato, Mexico1

  Temperature Range Amount Below/Over 78 degF Rainfall
January 44-71 degF / 7 - 24 degC 34/-7 .5 in / 13 mm
February 46-73 degF / 9 - 25 degC 32/-5 .1 in / 3 mm
March 49-78 degF / 11-27 degC 29/0 .2 in / 5 mm
April 54-82 degF / 12-29 degC 24/4 .8 in / 20 mm
May 57-85 degF / 14-31 degC 21/7 1.2 in / 30 mm
June 58-81 degF / 14-27 degC 20/3 5.1 in / 129 mm
July 57-78 degF / 13-24 degC 21/0 4.7 in / 119 mm
August 57-79 degF / 13-23 degC 21/1 4.6 in / 117 mm
September 56-77 degF / 14-24 degC 22/-1 4.7 in / 119 mm
October 52-76 degF / 12-24 degC 26/-2 4.7 in / 119 mm
November 49-74 degF / 9-23 degC 29/-4 .6 in / 15 mm
December 46-70 degF / 8 - 21 degC 32/-8 .4 in / 10 mm
Annual Average 52-77degF 26 / -1  


1. Other San Miguel de Allende weather estimates including average high and low temperatures and rainfall vary slightly around these temperature and rainfall estimates. On average the warmest month in San Miguel de Allende is May, the coolest month in San Miguel de Allende is January, and the wettest month in San Miguel de Allende is July.

More about the hilltop town of San Miguel de Allende, Mexico


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