Monthly climate averages for Monterrey, Mexico. Based on 10-year ERA5 reanalysis data.
BSh Hot Semi-Arid
Climate OverviewMonterrey, Mexico in September has hot conditions, with highs reaching 30°C (86°F) and afternoons the warmest part of the day.
This month falls at the beginning of Autumn.
Daily highs in September gradually drop from around 31°C (88°F) at the start to 29°C (84°F) by month's end.
Rainfall is heaviest during the first third of the month, while the middle tends to be drier.
The warmest days tend to fall around the 1th, averaging 31.9°C (89°F).
Compared to August, this month is about 3°C cooler with 6 more rainy days. Temperatures begin dropping heading into October.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 30°C (86°F) are ideal for full-day outdoor exploration.
Rain usually comes in shorter passing showers rather than all-day rain.
2 of the last 5 yearly records were warmer than this month's long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 21°C / 10°C | 19°C / 8°C | 5days (28 mm) Good | 8.8h Good | 62% Muggy | 5 Moderate | Good | View Details |
| February best | 24°C / 12°C | 23°C / 11°C | 3days (19 mm) Excellent | 9.5h Good | 60% Moderate | 6 High | Excellent | View Details |
| March best | 27°C / 15°C | 27°C / 15°C | 6days (35 mm) Good | 10.1h Excellent | 59% Moderate | 7.4 Very High | Excellent | View Details |
| April best | 29°C / 18°C | 31°C / 18°C | 6days (41 mm) Good | 10.8h Excellent | 62% Muggy | 8.1 Very High | Excellent | View Details |
| May | 32°C / 21°C | 34°C / 23°C | 8days (55 mm) Wet | 11.6h Excellent | 67% Muggy | 8.2 Very High | Good | View Details |
| June | 33°C / 23°C | 36°C / 25°C | 6days (61 mm) Good | 12.3h Excellent | 63% Muggy | 8.5 Very High | Fair | View Details |
| July | 33°C / 23°C | 36°C / 26°C | 4days (48 mm) Good | 11.7h Excellent | 61% Muggy | 8.3 Very High | Good | View Details |
| August | 34°C / 24°C | 36°C / 26°C | 3days (16 mm) Excellent | 11.8h Excellent | 58% Moderate | 8.4 Very High | Good | View Details |
| September | 30°C / 22°C | 33°C / 25°C | 9days (82 mm) Wet | 10.3h Excellent | 69% Muggy | 7.5 Very High | Good | View Details |
| October best | 27°C / 18°C | 29°C / 19°C | 6days (52 mm) Good | 9.9h Good | 69% Muggy | 6.3 High | Excellent | View Details |
| November best | 24°C / 15°C | 24°C / 14°C | 7days (42 mm) Good | 8.8h Good | 70% Muggy | 4.9 Moderate | Excellent | View Details |
| December | 22°C / 12°C | 22°C / 11°C | 5days (28 mm) Good | 8.5h Good | 66% Muggy | 4.5 Moderate | Excellent | View Details |
Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.
A waterproof jacket or compact umbrella is recommended for occasional showers.
Last updated:
We use cookies to analyze traffic and improve your experience. No personal data is sold or shared with advertisers.
We use Google Analytics to understand how visitors use WorldStats. This helps us improve content and performance. Analytics cookies track page views and session data — no personally identifiable information is collected. You can change your preference at any time from the footer.
