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Monterrey Weather by Month
Average temperatures, rainfall and humidity for Monterrey, Mexico, month by month, built from OpenWeather’s historical records. Use it to see what a typical Monterrey month looks like before you travel — then check the live Monterrey forecast for the days ahead.
Warmest month
August
34°C average high
Coolest month
January
8°C average low
Wettest month
September
55 mm of rain
Driest month
January
7 mm of rain
Average temperature and rainfall in Monterrey by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 20°C | 8°C | -4°C / 33°C | 7 mm | 62% | 9 km/h |
| February | 25°C | 11°C | -6°C / 38°C | 7 mm | 59% | 10 km/h |
| March | 27°C | 14°C | 2°C / 39°C | 15 mm | 58% | 11 km/h |
| April | 30°C | 17°C | 2°C / 41°C | 18 mm | 60% | 11 km/h |
| May | 32°C | 20°C | 9°C / 45°C | 23 mm | 65% | 11 km/h |
| June | 33°C | 22°C | 11°C / 43°C | 25 mm | 61% | 12 km/h |
| July | 34°C | 22°C | 12°C / 40°C | 19 mm | 60% | 11 km/h |
| August | 34°C | 22°C | 12°C / 41°C | 17 mm | 60% | 11 km/h |
| September | 30°C | 21°C | 13°C / 38°C | 55 mm | 68% | 9 km/h |
| October | 28°C | 17°C | 5°C / 38°C | 15 mm | 66% | 9 km/h |
| November | 24°C | 13°C | -3°C / 36°C | 11 mm | 68% | 9 km/h |
| December | 22°C | 11°C | -3°C / 38°C | 8 mm | 64% | 9 km/h |
Best time to visit Monterrey
The most comfortable time to visit Monterrey is generally February and November to December, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around September, totalling about 221 mm a year.
Travellers who prefer heat should aim for August, when highs average 34°C. September is the month to avoid if rain would spoil your plans — it averages 55 mm, roughly 8× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Monterrey forecast for what is happening now.