Monthly climate guide
Hermosillo weather in December
With highs near 24°C (75°F) and lows around 10°C (51°F), December feels warm in Hermosillo. Rainfall averages about 15 mm (very dry) and the sky is mostly sunny. Daytime highs are 5°C cooler than November and about the same as January.
What stands out in December
- Hermosillo is usually about 2°C cooler than Ciudad Obregón, 210 km away, in December.
- It's one of the drier months, with about 54% less rain than Hermosillo's average.
- Seasonally, December counts as early winter in Hermosillo.
- Afternoons and nights feel like different seasons, roughly 14°C apart.
December is typically Hermosillo's coolest month.
Avg high
24°C
75°F
Avg low
10°C
51°F
Rainfall
15 mm
very dry
Humidity
47%
relative
Sky
34%
cloud · mostly sunny
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 December
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- Sunglasses
Is December 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 December
Cite or embed this data
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Hermosillo weather in December. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/mexico/hermosillo/december
<a href="https://weathercompare.eu/weather/mexico/hermosillo/december">Hermosillo weather in December</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 December"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/mexico/hermosillo/december">Hermosillo weather in December</a> – WeatherCompare</p>
Hermosillo in December: quick answers
Is December a good time to visit Hermosillo?
Yes. December is one of the best months for Hermosillo, with highs around 24°C and about 15 mm of rain.
How warm is Hermosillo in December?
Average highs are about 24°C (75°F) and average lows about 10°C (51°F), based on 10 years of daily data.
Does it rain a lot in Hermosillo in December?
Hermosillo typically gets around 15 mm of rain in December — very dry.
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.