Weather in Monterrey in September
September in Monterrey is warm outdoor weather. Days are long enough to be useful. Shade starts to matter at midday.
In Mexico, this is how Monterrey actually wears September, not how a country centroid would. Compared with June and January, September sits in the middle of Monterrey's year.
- Average temp
- 27°C
22–32°C
- Rainfall
- 215 mm
A wet month
- Sunshine
- 6.3 h
hours per day
What to expect
Daytime
Warm days in Monterrey in September. A hat starts to earn its keep at midday. Evenings are the comfortable part of the clock.
You can walk at more hours than in the fierce months. Still build in a pause when the sun is high. Nights are easy.
Rain
September is the wet side of the year in Monterrey, the wettest stretch on these averages. Days can be heavy. Plans that cannot survive rain are the wrong plans.
This is not a reason to skip Monterrey if you like the place. It is a reason to pack for weather and to stop treating every grey hour as a failed holiday.
Evening
Evenings stay warm.
What to pack
Sun protection
Rain jacket
A layer for cooler evenings
Where to stay in Monterrey
Dates are a starting point for September.
Travel guides for Monterrey
What to read before you book.
Average weather in Monterrey
TemperatureRainfall
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FAQs about Monterrey
Climate averages for Monterrey, 1991–2020.
The best time to visit Monterrey is between February and May, the most comfortable stretch of the year on these averages.
August is the hottest month, with an average around 30°C.
September is the wettest month, with about 215 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
