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August in Hermosillo brings extremely high temperatures, with highs of 39°C (102°F) and nights dropping to 27°C (81°F). It's the rainiest month of the year, so come prepared with waterproof gear.
August in Hermosillo has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Pick a month to see the average temperature, rainfall and sunshine in Hermosillo - and find the best time to visit.
46-year average (1976-2025)
Based on our historical records, temperatures in Hermosillo typically stay consistent throughout August, with daily highs averaging around 39°C (102°F). Nights are warm, with lows around 27°C (81°F).
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Hermosillo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
The extremes listed below come from historical weather data collected in Hermosillo from 2006 through 2026.
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in August →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Hot weather in August means keeping cool is the priority. Loose-fitting clothes in natural fabrics work best. Pack plenty of shorts, tank tops, and breathable shirts. Don't forget a hat, swimwear, and comfortable sandals. Rain gear is recommended, you can expect wet weather on multiple days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Hermosillo climate overview or explore weather in Mexico.
Where to go in August - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
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