Monterrey weather in September 2025

Expect 31°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Monterrey in September. Check more long-term weather averages for Monterrey in September before you book your next holiday to Mexico in 2025/2026.

  • 31°C maximum daytime temperature in September in Monterrey31
    31°C max day temperature
  • 5 hours of sunshine per day
  • 8 days with some rainfall in September in Monterrey8
    8 days with some rainfall
  • 21°C minimum night-time temperature in September in Monterrey21
    21°C min night temperature
  • 12 hours of daylight per day in September in Monterrey12
    12 hours of daylight per day
  • High heat & humidity in September in MonterreyH
    High heat & humidity
  • 156 mm monthly rainfall in September in Monterrey156
    156 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Monterrey11
    11 (Extreme) UV index

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The September weather guide for Mexico (Monterrey) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Mexico

How hot is it in Monterrey in September?

Daytime temperatures usually reach 31°C in Monterrey in September with high heat and humidity, falling to 21°C at night.

How sunny is it in Monterrey in September?

There are normally 5 hours of bright sunshine each day in Monterrey in September - that's 41% of daylight hours.

Does it rain in Monterrey in September?

There are usually 8 days with some rain in Monterrey in September and the average monthly rainfall is 156mm.

What is the chance of a hurricane in Monterrey in September?

On average less than 1 day in September in Monterrey is likely to be affected by the passage of one or more tropical storms.

Monterrey September sunrise & sunset times

Browse the sunrise and sunset times for Monterrey in September 2025. Select a month to view Monterrey sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:22 19:00
Monday, 15th September 2025 06:27 18:45
Tuesday, 30th September 2025 06:33 18:29

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