Isla weather in December

In December, Isla sees average daytime highs of 27°C and overnight lows near 19°C, with 48 mm of rain across 9.5 wet days and about 10.9 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 26% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 hours at the start of December to 10 h 54 min by month's end. Set against the rest of the year, December is Isla's 6th-clearest and 6th-windiest month. For the whole year in context, see Isla's year-round climate.

Daytime high
27°
11th warmest
Overnight low
19°
2nd coldest
Rainfall
48 mm
9.5 wet days
Daylight
10 h 54 min
6:51 AM – 5:46 PM
Cloud cover
61%
6th clearest
Wind
9 km/h
6th windiest
Solar energy
3.38 kWh/m²
Travel score
6.5
out of 10

Isla is municipal seat of Isla, State of Veracruz, Mexico.

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 27°C through the month.

A typical December day in Isla reaches about 27°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 31°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)
12720
22720
32720
42720
52720
62720
72719
82719
92719
102719
112719
122719
132719
142719
152719
162719
172719
182719
192719
202719
212719
222619
232619
242619
252619
262619
272619
282619
292619
302619
312619

How December really feels in Isla

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.

Isla 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
Jan26° / 18°519.1116.7
Feb28° / 19°30611.46.4
Mar32° / 21°234.911.94.9
Apr34° / 23°315.212.43.3
May35° / 25°7911.412.82.5
Jun33° / 24°24322.613.12.3
Jul32° / 24°29426.4132.5
Aug32° / 24°29726.512.62.5
Sep32° / 24°31524.912.12.7
Oct30° / 23°20819.211.63.9
Nov28° / 21°9312.811.25.6
Dec27° / 19°489.510.96.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35248
45248
55149
65149
75149
85149
95149
105050
114951
124753
134753
144654
154555
164456
174357
184258
194159
204060
213961
223961
233961
243862
253862
263862
273862
283862
293862
303862
313961

Chance of precipitation in December

Any precipitation

Isla gets around 48 mm of rain over 9.5 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 31% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
332
432
531
631
730
830
929
1029
1129
1229
1328
1428
1528
1629
1729
1830
1930
2031
2131
2232
2332
2433
2533
2634
2734
2834
2934
3033
3133

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 67% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
115164433
215174433
315184432
425184432
525194331
625194331
725204330
825204230
925214229
1026214229
1126214228
1236224227
1336224226
1436234226
1537234225
1637244224
1737244224
1837254223
1937264222
2037264222
2137274221
2237274221
2337274220
2437274320
2537284319
2638284319
2728284319
2829284318
2929284218
3029284218
31310284217

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 hours at the start of December to 10 h 54 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 6:42 AM to 6:57 AM, and sunset from 5:42 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:425:42
211.06:435:42
311.06:435:42
411.06:445:42
511.06:445:43
611.06:455:43
711.06:465:43
811.06:465:43
910.96:475:44
1010.96:475:44
1110.96:485:44
1210.96:485:45
1310.96:495:45
1410.96:495:45
1510.96:505:46
1610.96:515:46
1710.96:515:46
1810.96:525:47
1910.96:525:47
2010.96:535:48
2110.96:535:48
2210.96:545:49
2310.96:545:49
2410.96:545:50
2510.96:555:50
2610.96:555:51
2710.96:565:51
2810.96:565:52
2910.96:575:52
3010.96:575:53
3110.96:575:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.38 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.38 kWh/m² to a high of 6.41 kWh/m² in May across the year — December's 3.38 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.5Moderate
73.4Moderate
83.4Moderate
93.4Moderate
103.4Moderate
113.4Moderate
123.4Moderate
133.4Moderate
143.4Moderate
153.4Moderate
163.4Moderate
173.3Moderate
183.3Moderate
193.3Moderate
203.3Moderate
213.3Moderate
223.3Moderate
233.3Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.3Moderate
313.3Moderate
Planning a trip in December

Hazard calendar for Isla

In seasonPeak

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

Isla's monsoon runs June–October, when most of the year's rain falls.

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

Is December a good time to visit Isla?

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

6.5
Sightseeing
2nd-best month of the year
6.6
Beach & pool
5th-best month of the year

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

What to pack for Isla in December

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

In December, Isla sees daytime highs around 27°C and nights near 19°C. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

UV index in Isla in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Isla peaks around August 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeExtremeVery highAug 17UV 12Dec 18UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar11Extreme
Apr13Extreme
May9Very high
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Isla 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 Isla is worst in May — around 41 µg/m³ PM2.5 (poor), about 3.0× the cleanest month (January, 14 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1739 µg/m³Jan 1814 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb15Moderate
Mar18Moderate
Apr27Moderate
May41Poor
Jun30Moderate
Jul34Moderate
Aug26Moderate
Sep23Moderate
Oct16Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Isla?

Isla sits at 18.0°N, 95.5°W, 67 m above sea level, in Mexico. The nearest listed city is Loma Bonita, 38 km away.

Topography around Isla

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

Within 3 km, the terrain around Isla has only modest variations in elevation — a maximum elevation change of 56 m around an average of 52 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 155 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,657 m.

The land around Isla is covered by grassland (52%) and trees (25%) within 3 km, grassland (60%) and trees (27%) within 16 km, and grassland (46%) and trees (36%) within 80 km.

3 km
56 m
16 km
155 m
80 km
1,657 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
December weather nearby: Loma Bonita 38 km · Carlos A. Carrillo 45 km · Cosamaloapan 47 km · Santiago Tuxtla 54 km · San Andrés Tuxtla 57 km · Catemaco 62 km · Tuxtepec 63 km · Acayucan 66 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 Isla (18.0278°, -95.5295°, elevation 67 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. 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).