Mazatlan weather in December

In December, Mazatlan sees average daytime highs of 24°C and overnight lows near 20°C, with 9 mm of rain across 1.4 wet days and about 10.6 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 24°C by the end. The sky is clear or mostly clear about 54% of the time in December, and the air most often feels muggy.

Daylight stretches from about 10 h 42 min at the start of December to 10 h 36 min by month's end. Set against the rest of the year, December is Mazatlan's 9th-clearest and 4th-windiest month. For the whole year in context, see Mazatlan's year-round climate.

Daytime high
24°
9th warmest
Overnight low
20°
4th coldest
Rainfall
9 mm
1.4 wet days
Daylight
10 h 36 min
6:44 AM – 5:19 PM
Cloud cover
42%
9th clearest
Wind
11 km/h
4th windiest
Solar energy
4.28 kWh/m²
Travel score
8.6
out of 10

Mazatlan is municipal seat of Mazatlán, State of Sinaloa, Mexico.

Founded
1531

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 25°C in the first days to 24°C by the end.

A typical December day in Mazatlan reaches about 24°C in the afternoon and slips back to 20°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 26°C. Set against its neighbours, December runs about 2°C cooler than November and about 1°C warmer than January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12622
22522
32521
42521
52521
62521
72521
82521
92521
102521
112521
122521
132521
142521
152420
162420
172420
182420
192420
202420
212420
222420
232420
242420
252420
262420
272420
282420
292420
302420
312419

How December really feels in Mazatlan

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mazatlan weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 19°151.510.78.6
Feb23° / 19°151.211.28.7
Mar23° / 20°30.411.89.0
Apr25° / 21°10.212.59.0
May27° / 23°10.213.18.8
Jun29° / 26°253.113.47.2
Jul30° / 27°13214.313.34.5
Aug30° / 27°18418.812.83.9
Sep30° / 27°2051912.14.0
Oct29° / 26°656.711.56.3
Nov27° / 23°35210.98.3
Dec24° / 20°91.410.68.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16931
26733
36634
46535
56535
66436
76436
86436
96436
106436
116436
126436
136436
146337
156436
166436
176436
186535
196436
206436
216436
226436
236436
246337
256436
266436
276436
286337
296436
306436
316436

Chance of precipitation in December

Any precipitation

Mazatlan gets around 9 mm of rain over 1.4 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 5% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
45
55
65
74
84
94
104
114
124
134
144
155
165
175
185
195
205
215
225
235
245
255
265
275
285
295
305
315

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the muggy band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 61% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
113135627
213135726
314145724
414145922
514155921
614166019
725175818
825185817
925205815
1025215814
1125235812
1226255611
132626579
142628568
152630566
161732555
171733554
181835533
191837522
201938502
211940491
221941471
2311042461
2411043461
2511044451
2611044451
2711044440
2811044440
2911044440
3011044440
312944440

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 42 min at the start of December to 10 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:35 AM to 6:51 AM, and sunset from 5:16 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.76:355:16
210.76:365:16
310.76:375:16
410.66:375:16
510.66:385:16
610.66:385:16
710.66:395:17
810.66:405:17
910.66:405:17
1010.66:415:17
1110.66:425:18
1210.66:425:18
1310.66:435:18
1410.66:435:18
1510.66:445:19
1610.66:445:19
1710.66:455:20
1810.66:465:20
1910.66:465:20
2010.66:475:21
2110.66:475:21
2210.66:485:22
2310.66:485:22
2410.66:485:23
2510.66:495:23
2610.66:495:24
2710.66:505:24
2810.66:505:25
2910.66:505:25
3010.66:515:26
3110.66:515:27

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.28 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.28 kWh/m² to a high of 7.73 kWh/m² in May across the year — December's 4.28 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.2Bright
144.2Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in December

Hazard calendar for Mazatlan

In seasonPeak

None of Mazatlan's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Mazatlan sits in the eastern Pacific hurricane zone; the season peaks August–September.

Mazatlan's monsoon runs July–September, when most of the year's rain falls.

Pacific hurricane
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Mazatlan?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.6
Sightseeing
5th-best month of the year
7.5
Beach & pool
6th-best month of the year

December is one of the better times to visit Mazatlan for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mazatlan in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Mazatlan sees daytime highs around 24°C and nights near 20°C. Worth packing: light clothes.

light clothes

Sea temperature near Mazatlan in December

The nearest coast averages about 25°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 30°C and coldest in March near 22°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar22Refreshing
Apr23Refreshing
May26Warm
Jun28Warm
Jul29Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov27Warm
Dec25Warm

UV index in Mazatlan in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mazatlan peaks around May 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighMay 16UV 12Dec 20UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep11Extreme
Oct8Very high
Nov6High
Dec6High
Location & terrain

Where is Mazatlan?

Mazatlan sits at 23.2°N, 106.4°W, 1 m above sea level, in Mexico. The nearest listed city is El Rosario, 63 km away.

Costa RicaTuxpan

Topography around Mazatlan

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mazatlan.

Within 3 km, the terrain around Mazatlan has only modest variations in elevation — a maximum elevation change of 80 m around an average of 5 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 302 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,594 m.

The land around Mazatlan is covered by artificial surfaces (55%) and water (36%) within 3 km, water (52%) and trees (23%) within 16 km, and trees (51%) and water (36%) within 80 km.

3 km
80 m
16 km
302 m
80 km
2,594 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: El Rosario 63 km · Escuinapa de Hidalgo 78 km · La Cruz 92 km · Pueblo Nuevo 109 km · El Salto 124 km · Acaponeta 136 km · Costa Rica 181 km · Tuxpan 183 km

Mexico travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 / 127 V · 60 Hz
Prices
≈ 54% of US
price level, 2025
GDP per capita
$13,889
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
12.8
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 440
Religion
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mazatlan (23.2216°, -106.4189°, elevation 1 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).