Merida weather in December

In December, Merida sees average daytime highs of 29°C and overnight lows near 19°C, with 23 mm of rain across 4.3 wet days and about 10.7 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 42% of the time in December, and the air most often feels muggy.

Daylight stretches from about 10 h 48 min at the start of December to 10 h 42 min by month's end. Set against the rest of the year, December is Merida's 6th-clearest and 7th-windiest month. For the whole year in context, see Merida's year-round climate.

Daytime high
29°
11th warmest
Overnight low
19°
3rd coldest
Rainfall
23 mm
4.3 wet days
Daylight
10 h 42 min
6:33 AM – 5:17 PM
Cloud cover
48%
6th clearest
Wind
10 km/h
7th windiest
Solar energy
3.92 kWh/m²
Travel score
6.1
out of 10

Merida is capital city of Yucatan, Mexico.

Air quality
Moderate
PM2.5 15 µg/m³ · 2018
Density
1,360/km²
people per km²
Founded
1542

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical December day in Merida reaches about 29°C in the afternoon and slips back to 19°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 32°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13020
23020
33020
43020
53019
63019
73019
83019
93019
102919
112919
122919
132919
142919
152919
162919
172919
182919
192919
202919
212919
222919
232919
242919
252919
262919
272919
282919
292919
302919
312919

How December really feels in Merida

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.

Merida weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 19°214.210.96.3
Feb31° / 19°15311.35.5
Mar33° / 20°14311.94.2
Apr35° / 22°234.412.52.9
May36° / 24°527.8132.3
Jun35° / 24°12416.713.22.3
Jul34° / 24°8515.613.12.4
Aug34° / 24°9517.112.72.4
Sep33° / 24°13419.312.12.5
Oct32° / 23°8613.711.53.8
Nov30° / 20°305.7115.5
Dec29° / 19°234.310.76.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 23% of December, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16931
26931
36931
46931
57030
67030
77030
87030
96931
106832
116832
126634
136535
146535
156436
166436
176337
186337
196238
206238
216337
226337
236337
246337
256436
266436
276535
286535
296634
306634
316634

Chance of precipitation in December

Any precipitation

Merida gets around 23 mm of rain over 4.3 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 14% and peaks near 15% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
113
213
313
413
513
614
714
814
914
1014
1115
1215
1315
1415
1515
1615
1715
1815
1914
2014
2114
2214
2314
2414
2514
2614
2714
2814
2914
3013
3113

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 40% 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 (%)
1210204226
2210204326
3210204325
4210204325
5211194325
6211194325
7312194225
8312194224
9313194124
10313194024
11414194024
12414193924
13415193823
14415203823
15416203723
16516203722
17516213722
18516213621
19516223721
20516223720
21515223720
22615233720
23614233819
24614233819
25613233919
26613233918
27613234018
28613234018
29713234117
30713224117
31813224116

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 48 min at the start of December to 10 h 42 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 6:24 AM to 6:39 AM, and sunset from 5:13 PM to 5:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.86:245:13
210.86:245:13
310.86:255:13
410.86:265:13
510.86:265:13
610.86:275:14
710.86:275:14
810.86:285:14
910.86:295:14
1010.86:295:15
1110.86:305:15
1210.76:305:15
1310.76:315:16
1410.76:325:16
1510.76:325:16
1610.76:335:17
1710.76:335:17
1810.76:345:17
1910.76:345:18
2010.76:355:18
2110.76:355:19
2210.76:365:19
2310.76:365:20
2410.76:375:20
2510.76:375:21
2610.76:375:21
2710.76:385:22
2810.76:385:22
2910.76:395:23
3010.76:395:23
3110.76:395:24

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.92 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.92 kWh/m² to a high of 6.7 kWh/m² in May across the year — December's 3.92 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.0Bright
44.0Bright
54.0Moderate
64.0Moderate
74.0Moderate
84.0Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
313.9Moderate
Planning a trip in December

Hazard calendar for Merida

In seasonPeak

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

Merida sits in the Atlantic hurricane belt; the season peaks August–October.

Merida's rainy season runs June–October, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Merida?

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

6.1
Sightseeing
2nd-best month of the year
8.0
Beach & pool
2nd-best month of the year

December is a reasonable time to visit Merida for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Merida in December

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

In December, Merida sees daytime highs around 29°C and nights near 19°C. Pack light clothes. About 4 days see rain.

light clothes

Sea temperature near Merida 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 at the nearest coast (about 45 km away) is warmest in September at about 28°C and coldest in January near 24°C.

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

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Warm
Mar25Warm
Apr26Warm
May26Warm
Jun27Warm
Jul27Warm
Aug28Warm
Sep28Tropical
Oct28Warm
Nov26Warm
Dec25Warm

UV index in Merida 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 Merida peaks around June 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJun 16UV 13Dec 17UV 6
UV index (midday)Level
Jan7High
Feb10Very high
Mar11Extreme
Apr12Extreme
May11Extreme
Jun13Extreme
Jul11Extreme
Aug12Extreme
Sep11Extreme
Oct10Very high
Nov7High
Dec6High

Air quality in Merida in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Merida is worst in April — around 25 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (January, 8 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Merida's WHO annual average of 15 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2024 µg/m³Jan 118 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar12Good
Apr25Moderate
May20Moderate
Jun25Moderate
Jul23Moderate
Aug19Moderate
Sep15Moderate
Oct10Good
Nov8Good
Dec8Good
Location & terrain

Where is Merida?

Merida sits at 21.0°N, 89.6°W, 10 m above sea level, in Mexico. The nearest listed city is Kanasín, 8.0 km away.

Topography around Merida

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

Within 3 km, the terrain around Merida has only modest variations in elevation — a maximum elevation change of 13 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 33 m; within 80 km, only modest variations in elevation — a maximum elevation change of 152 m.

The land around Merida is covered by artificial surfaces (89%) within 3 km, trees (56%) and artificial surfaces (27%) within 16 km, and trees (64%) and water (24%) within 80 km.

3 km
13 m
16 km
33 m
80 km
152 m
treesgrasslandartificial surfacesbare terrainwatermangroves
December weather nearby: Kanasín 8.0 km · Umán 16 km · Hunucmá 27 km · Progreso 35 km · Motul 38 km · Izamal 63 km · Ticul 64 km · Oxkutzkab 76 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 Merida (20.967°, -89.6232°, elevation 10 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).