Mazatlán weather in December
December in Mazatlán: hot, dry, with clean air — an excellent time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#5 of 12 months in Mazatlán · #39 of 1413 destinations to visit in December · comfort 92/100 (tier S)
- Days
- 28°C
- Nights
- 16°C
- Wet days
- 1
- Sun
- 9.5 h
- Humidity
- 76%
- Daylight
- 11 h

Traveller notes on Mazatlán in December
Other months in Mazatlán
Forum posters consistently rate November as one of Mazatlan's best months, some rating it even nicer than February, with warm days, warm evenings and humidity finally easing off after running high most of the year. Posters do flag that hurricane season technically extends into November, recommending keeping an eye on tropical weather updates and having travel insurance in place just in case. Posters cite the eight-month dry stretch from November through June as averaging only about 4.4 inches of rain total, underscoring how reliably dry this window runs. Posters generally rate November as close to perfect for Mazatlan, pairing great weather with lower crowds and a town gearing up for the holiday season.
Forum posters describe early May as close to ideal - daytime temperatures typically 80-90F, clear skies, essentially no rain and few bugs, with evenings called genuinely perfect. Posters note February through May counts as an almost completely rain-free stretch (barely a tenth of an inch of precipitation a month), and locals reportedly run an informal betting pool each year on which day the rainy season's first real storm lands - nobody who actually lives in Mazatlan picks a date before mid-June. Beyond the weather, posters call May a noticeably quiet month for foreign tourists specifically, though weekend visitor numbers from elsewhere in Mexico have picked up in recent years thanks to improved highway access.
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Mazatlán climate normals — December
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Mazatlán in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Mazatlán's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherMazatlán's weather peaks March–May, best around April.
Best weatherFair weatherToughest weather
What's on in Mazatlán in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Humpback whale season
15 Dec – 5 Apr · usuallyHumpbacks come down the Pacific coast to calve and the boats run out past Isla de Chivos most mornings. January and February are the reliable weeks; the shoulders are a lottery.
Where is Mazatlán?
Mazatlán in December — FAQ
- Is December a good time to visit Mazatlán?
- December in Mazatlán: hot, dry, with clean air — an excellent time to visit. It ranks #5 of 12 months for Mazatlán on SeasonMap's comfort score (92/100).
- What is the weather like in Mazatlán in December?
- In December, Mazatlán averages a daily high of 28.2°C and a low of 16.4°C, with about 8.7 mm of rain over roughly 1 rainy days.
- What is the air quality in Mazatlán in December?
- Mazatlán has a mean US Air Quality Index of about 42 in December.