Monthly climate guide
Hermosillo weather in August
Expect very hot weather in Hermosillo in August: afternoons reach about 37°C (99°F), while nights drop to around 26°C (79°F). Around 95 mm of rain falls over the month (wet), and skies are a mix of sun and cloud. Daytime highs are about the same as July and about the same as September.
What stands out in August
- Rain is above Hermosillo's usual level, by about 190%.
- Expect more cloud than at any other time of year.
- Only 2 months are warmer in Hermosillo than August.
- Nights stay warm, rarely below 26°C — air-conditioning helps.
Avg high
37°C
99°F
Avg low
26°C
79°F
Rainfall
95 mm
wet
Humidity
58%
relative
Sky
51%
cloud · a mix of sun and cloud
Hermosillo weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 25°C / 78°F | 10°C / 50°F | 15 mm | 42% | 29% |
| February | 27°C / 80°F | 11°C / 51°F | 10 mm | 41% | 33% |
| March | 30°C / 86°F | 13°C / 56°F | 13 mm | 36% | 31% |
| April | 33°C / 91°F | 15°C / 60°F | 2 mm | 31% | 22% |
| May | 35°C / 95°F | 18°C / 64°F | 1 mm | 30% | 14% |
| June | 40°C / 105°F | 24°C / 75°F | 11 mm | 33% | 21% |
| July | 38°C / 100°F | 26°C / 79°F | 107 mm | 53% | 60% |
| August | 37°C / 99°F | 26°C / 79°F | 95 mm | 58% | 51% |
| September | 37°C / 98°F | 24°C / 76°F | 90 mm | 58% | 34% |
| October | 34°C / 94°F | 20°C / 67°F | 10 mm | 46% | 19% |
| November | 29°C / 84°F | 15°C / 59°F | 24 mm | 43% | 30% |
| December | 24°C / 75°F | 10°C / 51°F | 15 mm | 47% | 34% |
What to pack for August
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is August a good time to visit Hermosillo?
Compare the months in the chart above to find your ideal window.
Best time to visit Hermosillo →Other Mexico cities in August
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Hermosillo weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/mexico/hermosillo/august
<a href="https://weathercompare.eu/weather/mexico/hermosillo/august">Hermosillo weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/mexico/hermosillo" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Hermosillo weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/mexico/hermosillo/august">Hermosillo weather in August</a> – WeatherCompare</p>
Hermosillo in August: quick answers
Is August a good time to visit Hermosillo?
It can be, if you like heat: August highs in Hermosillo are around 37°C. Good for the beach; plan sightseeing for early morning and evening.
How warm is Hermosillo in August?
Average highs are about 37°C (99°F) and average lows about 26°C (79°F), based on 10 years of daily data.
Does it rain a lot in Hermosillo in August?
Hermosillo typically gets around 95 mm of rain in August — wet.
Figures are long-term averages for the area around Hermosillo (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.