Climate averages 1991–2020
Monterrey weather
in August.
A hot, fairly dry month: the warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Monterrey: daytime highs average 32.6°C and nights cool to about 22.6°C. By daytime temperature it is the warmest month of the year.
Expect about 31 mm of rain on roughly 5 days, which makes August a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 02 min on an average August day.
The nearest other city in this atlas is San Pedro Garza García (9 km away). In August its highs average 31.8°C, 0.8°C cooler than Monterrey, with 36 mm of rain.
Among the 153 cities listed in Mexico, Monterrey ranks joint 32nd of 153 for the warmest August highs and joint 12th of 153 for the driest August (rainfall, lowest first). The mean August high of those 153 cities is 27.9°C; Monterrey is 4.6°C warmer than that mean.
From August to September, average highs fall by 3.9°C to 28.7°C, and monthly rainfall rises from 31 mm to 117 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Monterrey climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.3°C9.5°C | 9.5°C | 37 | 6.3 | 10.711 h |
| February | 21.9°C11.4°C | 11.4°C | 33 | 5.8 | 11.311 h |
| March | 25.0°C14.0°C | 14.0°C | 46 | 7.1 | 12.012 h |
| April | 28.1°C17.1°C | 17.1°C | 46 | 6.7 | 12.713 h |
| May | 30.3°C20.0°C | 20.0°C | 52 | 7.7 | 13.413 h |
| June | 32.0°C21.8°C | 21.8°C | 39 | 5.4 | 13.714 h |
| July | 32.3°C22.3°C | 22.3°C | 41 | 4.6 | 13.614 h |
| August, selected | 32.6°C22.6°C | 22.6°C | 31 | 4.5 | 13.013 h |
| September | 28.7°C20.6°C | 20.6°C | 117 | 10.4 | 12.312 h |
| October | 26.2°C17.5°C | 17.5°C | 59 | 7.2 | 11.612 h |
| November | 22.3°C13.4°C | 13.4°C | 38 | 6.3 | 10.911 h |
| December | 19.7°C10.4°C | 10.4°C | 32 | 5.7 | 10.611 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- San Pedro Garza García in AugustMexico · 9 kmHigh 31.8°C · Low 22.4°C · 36 mm rain
- Ciudad General Escobedo in AugustMexico · 12 kmHigh 32.7°C · Low 22.3°C · 31 mm rain
- Santa Catarina in AugustMexico · 14 kmHigh 31.7°C · Low 22.5°C · 36 mm rain
- Ciudad Apodaca in AugustMexico · 17 kmHigh 33.6°C · Low 22.7°C · 31 mm rain
- Ciudad Benito Juárez in AugustMexico · 23 kmHigh 33.1°C · Low 22.4°C · 48 mm rain
- García in AugustMexico · 30 kmHigh 31.8°C · Low 22.3°C · 36 mm rain
- Saltillo in AugustMexico · 72 kmHigh 26.8°C · Low 16.8°C · 86 mm rain
- Linares in AugustMexico · 119 kmHigh 34.2°C · Low 22.5°C · 57 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Monterrey) is explained once on the Monterrey year overview and on the Sources, method and limits page.
Ciudad Apodaca and Ciudad General Escobedo lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.