Monterrey weather in August

August in Monterrey: sweltering, dry — fine if you can take 37°C afternoons.

Updated September 2026 · climate normals from ERA5 reanalysis

Monterrey🇲🇽 Mexico · Baja & Northern Mexico · City72
  1. 87Jan
  2. 95Feb
  3. 90Mar
  4. 83Apr
  5. 74May
  6. 69Jun
  7. 70Jul
  8. 72Aug
  9. 73Sep
  10. 84Oct
  11. 92Nov
  12. 89Dec

#10 of 12 months in Monterrey · #902 of 1413 destinations to visit in August · comfort 72/100 (tier B)

Days
34°C
Nights
24°C
Wet days
3
Sun
11.7 h
Humidity
58%
Daylight
13 h
Monterrey, Mexico
Photo: Dante Muñoz · Pexels

Traveller notes on Monterrey in August

Forum posters describe Monterrey summer weather as capable of reaching up to 100F, making August one of the hottest, most intense stretches of the year in this northern Mexican city. Posters discussing Mexico's August weather more broadly describe high humidity as a common feature across the country's warmer regions this time of year, with daytime highs elsewhere in the low 30sC and overnight lows staying warm as well. Given the limited destination-specific detail available for Monterrey in August specifically, this note leans on that broader pattern: expect serious heat, real humidity, and the need to plan around air-conditioned spaces during the hottest parts of the day. Posters generally recommend visiting Monterrey outside the peak summer months if avoiding intense heat is a priority.
Tripadvisor community · August · 1 month ago · Read more on Tripadvisor ↗

Other months in Monterrey

Forum posters describe February across much of Mexico as generally dry and dusty, with real heat not arriving in earnest until closer to May, before the rains set in - placing February in the milder, drier stretch of the year for inland cities like Monterrey. Posters do flag that nights can still be genuinely chilly this time of year even where days turn pleasant. Posters comparing regions note Mexico's Pacific coast resorts get the warmest, sunniest February weather with the least rain risk, a useful contrast that implies Monterrey itself, being inland and further from the coast's moderating influence, likely runs cooler and more variable than those beach destinations at the same time of year.
Tripadvisor community · February · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Monterrey's card on the map.

Monterrey climate normals — August

Daytime high34°C / 94°F🔥 sweltering
Nighttime low24°C / 75°F
Feels like (high)37°C / 99°F
Rainfall16 mm / 0.6 in☀️ dry
Rainy days3 days
Humidity58%🍃 comfortable
Dew point18°C / 65°F
Sunshine11.7 h/day
Daylight13 h
Wind14 km/h / 9 mph
Air quality (US AQI)52🙂 moderate

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Monterrey in August

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Quietschool holidays in 3 of the markets that fill it, one of its worst months for weather(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Monterrey's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Toughest weatherMonterrey's best weather comes in February, March and November — separate windows, not one continuous season.

August coincides with Summer heat.

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Best weatherFair weatherToughest weather

What's on in Monterrey in August

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Hazard

    Summer heat

    15 May – 5 Sep · usuallyExtreme heat

    The city sits in a bowl of the Sierra Madre and holds its heat well into the night. Outdoor plans move to the early morning, and the reservoirs the city drinks from have run dry in the worst of these summers. Source ↗

  • Hazard

    Tropical rain and flooding

    1 Jul – 15 Oct · usuallyFlood season

    Gulf storms that cross the coast dump their rain on the Sierra Madre behind the city, and the Santa Catarina riverbed fills within hours. Gilbert and Alex both did serious damage this way. Source ↗

What's on around the world in August →

Where is Monterrey?

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Monterrey in August — FAQ

Is August a good time to visit Monterrey?
August in Monterrey: sweltering, dry — fine if you can take 37°C afternoons. It ranks #10 of 12 months for Monterrey on SeasonMap's comfort score (72/100).
What is the weather like in Monterrey in August?
In August, Monterrey averages a daily high of 34.2°C and a low of 23.8°C, with about 15.7 mm of rain over roughly 3.3 rainy days.
What is the air quality in Monterrey in August?
Monterrey has a mean US Air Quality Index of about 52 in August.