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San Miguel de Allende Weather in September
September in San Miguel de Allende typically sees daytime highs of 27°C (81°F) and nighttime lows of 15°C (59°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in San Miguel de Allende in September
Typically, you can expect about 10 days of rain this month, with 114 mm (4.5 in) on average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in San Miguel de Allende in September
Expect highs of 27°C (81°F) in San Miguel de Allende in September, with nights dropping to around 15°C (59°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights drop to around 15°C (59°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in San Miguel de Allende in September
The days are predominantly sunny, with an estimated total of around 199 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, October, November and December typically offer the best weather for San Miguel de Allende.
San Miguel de Allende Temperature in September
Min Temperature
15°C (59°F)
Max Temperature
27°C (81°F)
Chance of Rain
32%
Precipitation
114 mm (4.5 in)
Rainy days
10 days
Sunshine
199 hours *
Percentage Sunshine
*
* Data from: Guanajuato City, Mexico (53 KM, 32 Miles).
San Miguel de Allende Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Miguel de Allende - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in San Miguel de Allende typically stay consistent throughout September, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows typically ranging from 13°C (55°F) to 15°C (59°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for San Miguel de Allende in September
Browse day-by-day weather records for San Miguel de Allende spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Miguel de Allende historical weather extremes in September
The extremes listed below come from historical weather data collected in San Miguel de Allende from 1986 through 2026.
- On September 25, 2005, temperatures climbed to 33°C (91°F), marking the warmest September day on record.
- On September 28, 1988, San Miguel de Allende saw its coldest September day with temperatures maxing out at 13°C (55°F).
- Nighttime temperatures dropped to 4°C (39°F) on September 9, 2011, marking the coldest September night on record.
Best Places in Mexico in September
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in San Miguel de Allende in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in San Miguel de Allende in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
San Miguel de Allende 3-Day Forecast
More climate data for San Miguel de Allende
See the full San Miguel de Allende climate overview or explore weather in Mexico.
Popular in September
Where to go in September - average daytime high across popular destinations.
Puerto Peñasco
34°C (93°F) Los Cabos
32°C (90°F) Tulum31°C (88°F) Cancún30°C (86°F) Playa del Carmen31°C (88°F) Puerto Vallarta29°C (84°F) San Miguel de Allende
27°C (81°F) Mexico City23°C (73°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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