September · Mexico
Best time to visit Monterrey in September Weather, crowds & prices
Weather in Monterrey in September
Average temperature 21°C, 106 mm of rain, about 25 days with 6+ hours of sunshine and 70% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.1/10
Ranked #11 of 12 months
- Avg temp
- 21°C
- Rainfall
- 106 mm
- Humidity
- 70%
- Days with 6h+ sun
- 25
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Monterrey scores 8.1/10 for sightseeing and cultural travel - ranked #11 of 12. Expect around 21°C, 106 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Monterrey is Mexico’s northern industrial capital framed by Cerro de la Silla-mountain parks and a modern business core. Best window: cooler months from late autumn through early spring.
September in Monterrey: strong conditions, 11th of 12
At 21°C (69°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
106 mm of rain makes this a wet month here, though with about 25 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 8.1/10 on the same scale — 11th of 12 months, versus 9.9/10 for the best month here.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
Budget for low-season pricing, and crowds are light for this destination.
If your dates are flexible, March is materially better in Monterrey — 1.8 points higher on the same scale.
Frequently asked
- What is the weather like in Monterrey in September?
- In September, Monterrey averages 21°C, 106 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 8.1/10.
- Is September a good time to visit Monterrey?
- September earns a 8.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Monterrey in September?
- Expect about 106 mm of rain in September. Average humidity is 70% and there are about 25 days with 6+ hours of sunshine.
Curated in Monterrey
Tickets & experiences
Things to do in Monterrey
Monterrey, Mexico. Live activities and tours from GetYourGuide, matched to this destination.