Climate averages 1991–2020
Hermosillo weather
in August.
A very hot, moderately wet month: the 3rd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a very hot month in Hermosillo: daytime highs average 37.6°C and nights cool to about 26.6°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 51 mm of rain on roughly 10 days, which makes August a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 11 min on an average August day.
The nearest other city in this atlas is Heroica Guaymas (130 km away). In August its highs average 33.9°C, 3.6°C cooler than Hermosillo, with 26 mm of rain.
Among the 153 cities listed in Mexico, Hermosillo ranks 3rd of 153 for the warmest August highs and 27th of 153 for the driest August (rainfall, lowest first). The mean August high of those 153 cities is 27.9°C; Hermosillo is 9.6°C warmer than that mean.
From August to September, average highs fall by 1.5°C to 36.0°C, and monthly rainfall rises from 51 mm to 52 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
Hermosillo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.8°C9.4°C | 9.4°C | 12 | 1.6 | 10.511 h |
| February | 25.0°C10.3°C | 10.3°C | 15 | 2.0 | 11.111 h |
| March | 28.5°C12.3°C | 12.3°C | 6.5 | 0.8 | 12.012 h |
| April | 31.7°C14.9°C | 14.9°C | 1.4 | 0.4 | 12.813 h |
| May | 35.2°C18.1°C | 18.1°C | 0.4 | 0.1 | 13.614 h |
| June | 39.1°C23.3°C | 23.3°C | 3.3 | 1.1 | 14.014 h |
| July | 38.3°C26.6°C | 26.6°C | 40 | 7.6 | 13.814 h |
| August, selected | 37.6°C26.6°C | 26.6°C | 51 | 9.8 | 13.213 h |
| September | 36.0°C24.5°C | 24.5°C | 52 | 7.1 | 12.412 h |
| October | 33.2°C19.1°C | 19.1°C | 19 | 2.1 | 11.511 h |
| November | 27.9°C13.5°C | 13.5°C | 13 | 1.5 | 10.711 h |
| December | 23.1°C9.4°C | 9.4°C | 19 | 1.9 | 10.310 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
- Heroica Guaymas in AugustMexico · 130 kmHigh 33.9°C · Low 28.5°C · 26 mm rain
- Ciudad Obregón in AugustMexico · 205 kmHigh 36.4°C · Low 26.5°C · 84 mm rain
- Nogales in AugustMexico · 247 kmHigh 31.4°C · Low 19.5°C · 92 mm rain
- Navojoa in AugustMexico · 270 kmHigh 35.6°C · Low 26.2°C · 104 mm rain
- Agua Prieta in AugustMexico · 284 kmHigh 32.7°C · Low 20.6°C · 46 mm rain
- Tucson in AugustUnited States · 348 kmHigh 36.0°C · Low 24.4°C · 33 mm rain
- Cuauhtémoc in AugustMexico · 407 kmHigh 24.5°C · Low 14.4°C · 105 mm rain
- Los Mochis in AugustMexico · 415 kmHigh 34.4°C · Low 26.5°C · 92 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 Hermosillo) is explained once on the Hermosillo year overview and on the Sources, method and limits page.