Matías Romero Avendaño weather in December

In December, Matías Romero Avendaño sees average daytime highs of 25°C and overnight lows near 19°C, with 47 mm of rain across 10.8 wet days and about 11 hours of daylight. It is the 11th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 22% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 06 min at the start of December to 11 hours by month's end. Set against the rest of the year, December is Matías Romero Avendaño's 6th-clearest and 5th-windiest month. For the whole year in context, see Matías Romero Avendaño's year-round climate.

Daytime high
25°
11th warmest
Overnight low
19°
2nd coldest
Rainfall
47 mm
10.8 wet days
Daylight
11 hours
6:46 AM – 5:46 PM
Cloud cover
64%
6th clearest
Wind
17 km/h
5th windiest
Solar energy
3.65 kWh/m²
Travel score
6.5
out of 10

Matías Romero Avendaño is municipal seat of Matías Romero, State of Oaxaca, Mexico.

Density
13/km²
people per km²

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 25°C through the month.

A typical December day in Matías Romero Avendaño reaches about 25°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°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)
12619
22619
32619
42619
52619
62619
72619
82619
92619
102619
112619
122619
132619
142619
152519
162518
172518
182518
192518
202518
212518
222518
232518
242518
252518
262518
272518
282518
292518
302518
312518

How December really feels in Matías Romero Avendaño

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.

Matías Romero Avendaño weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 18°4710.911.16.7
Feb27° / 19°347.211.46.7
Mar30° / 20°286.411.95.6
Apr33° / 22°255.412.44.2
May33° / 23°6210.512.83.3
Jun32° / 23°19020.7132.9
Jul30° / 23°21125.312.93.0
Aug30° / 23°23126.412.63.0
Sep30° / 23°23923.712.13.3
Oct28° / 22°16819.311.64.5
Nov27° / 20°8714.411.25.8
Dec25° / 19°4710.8116.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24456
34456
44456
54357
64456
74456
84357
94357
104258
114258
124159
134159
144060
153961
163961
173961
183961
193862
203862
213763
223664
233664
243664
253664
263664
273466
283466
293466
303565
313565

Chance of precipitation in December

Any precipitation

Matías Romero Avendaño gets around 47 mm of rain over 10.8 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 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
337
437
537
636
736
836
935
1035
1135
1235
1335
1435
1535
1635
1735
1835
1936
2036
2136
2236
2336
2436
2536
2636
2736
2836
2936
3036
3136

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
126245018
226255017
326255116
427255016
527255115
627265114
727265114
828265113
928265212
1028275112
1129275111
1239275011
1339285010
14310284910
15310294810
1631030489
1731031479
1831031469
1931032468
2031033458
2131034458
2231134457
2331135457
2431135456
2531135456
2631135456
2731235455
2831235455
2931235455
3031335455
3131335454

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 17 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 06 min at the start of December to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:38 AM to 6:53 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)
111.16:385:42
211.16:395:42
311.16:395:42
411.06:405:42
511.06:405:43
611.06:415:43
711.06:415:43
811.06:425:43
911.06:435:44
1011.06:435:44
1111.06:445:44
1211.06:445:45
1311.06:455:45
1411.06:455:45
1511.06:465:46
1611.06:465:46
1711.06:475:47
1811.06:475:47
1911.06:485:48
2011.06:485:48
2111.06:495:48
2211.06:495:49
2311.06:505:49
2411.06:505:50
2511.06:515:50
2611.06:515:51
2711.06:525:51
2811.06:525:52
2911.06:525:52
3011.06:535:53
3111.06:535:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.65 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.65 kWh/m² to a high of 6.42 kWh/m² in April across the year — December's 3.65 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.6Moderate
313.6Moderate
Planning a trip in December

Hazard calendar for Matías Romero Avendaño

In seasonPeak

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

Matías Romero Avendaño'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 Matías Romero Avendaño?

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

6.5
Sightseeing
3rd-best month of the year
6.0
Beach & pool
6th-best month of the year

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

What to pack for Matías Romero Avendaño in December

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

In December, Matías Romero Avendaño sees daytime highs around 25°C and nights near 19°C. Worth packing: light clothes and rain gear. About 11 days see rain.

light clothesrain gear

UV index in Matías Romero Avendaño in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Matías Romero Avendaño peaks around August 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 16UV 13Dec 18UV 8
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar12Extreme
Apr13Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Matías Romero Avendaño 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 Matías Romero Avendaño is worst in May — around 53 µg/m³ PM2.5 (poor), about 5.2× the cleanest month (January, 10 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodMay 1650 µg/m³Jan 1510 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar16Moderate
Apr27Moderate
May53Poor
Jun26Moderate
Jul29Moderate
Aug22Moderate
Sep19Moderate
Oct13Moderate
Nov11Good
Dec11Good
Location & terrain

Where is Matías Romero Avendaño?

Matías Romero Avendaño sits at 16.9°N, 95.0°W, 186 m above sea level, in Mexico. The nearest listed city is Ixtepec, 36 km away.

Topography around Matías Romero Avendaño

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

Within 3 km, the terrain around Matías Romero Avendaño has only modest variations in elevation — a maximum elevation change of 92 m around an average of 205 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,088 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,304 m.

The land around Matías Romero Avendaño is covered by trees (46%) and grassland (38%) within 3 km, trees (62%) and grassland (36%) within 16 km, and trees (61%) and grassland (23%) within 80 km.

3 km
92 m
16 km
1,088 m
80 km
2,304 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Ixtepec 36 km · Heroica Ciudad de Juchitán de Zaragoza 49 km · Santo Domingo Tehuantepec 65 km · Salina Cruz 80 km · Acayucan 120 km · Jáltipan de Morelos 126 km · Cosoleacaque 132 km · Minatitlán 135 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 Matías Romero Avendaño (16.8774°, -95.0382°, elevation 186 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).