Atoyac de Álvarez weather in December

In December, Atoyac de Álvarez sees average daytime highs of 27°C and overnight lows near 19°C, with 14 mm of rain across 3.7 wet days and about 11 hours of daylight. It is the 12th-warmest and 8th-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 63% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 hours at the start of December to 11 hours by month's end. Set against the rest of the year, December is Atoyac de Álvarez's 5th-clearest and 7th-windiest month. For the whole year in context, see Atoyac de Álvarez's year-round climate.

Daytime high
27°
12th warmest
Overnight low
19°
2nd coldest
Rainfall
14 mm
3.7 wet days
Daylight
11 hours
7:09 AM – 6:07 PM
Cloud cover
35%
5th clearest
Wind
5 km/h
7th windiest
Solar energy
4.92 kWh/m²
Travel score
7.8
out of 10

Atoyac de Álvarez is municipal seat of Atoyac, State of Guerrero, 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 Atoyac de Álvarez reaches about 27°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12719
22719
32719
42719
52719
62719
72719
82719
92719
102719
112719
122719
132719
142719
152719
162719
172719
182719
192719
202719
212719
222719
232719
242719
252719
262719
272719
282719
292719
302719
312719

Atoyac de Álvarez weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°132.111.18.1
Feb28° / 19°91.311.47.9
Mar29° / 20°50.711.97.3
Apr30° / 21°10.412.46.6
May30° / 22°638.712.85.3
Jun28° / 23°29923.4133.8
Jul28° / 23°26723.712.93.8
Aug28° / 23°32426.312.63.6
Sep28° / 22°39527.912.13.5
Oct28° / 22°29226.911.63.9
Nov28° / 20°7113.611.26.0
Dec27° / 19°143.7117.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 63% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 21%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18119
28119
38218
48218
58218
68218
78218
88218
98119
108119
117921
127921
137921
147822
157723
167723
177723
187723
197723
207723
217723
227822
237822
247822
257822
267921
277921
287921
297921
308020
318020

Chance of precipitation in December

Any precipitation

Atoyac de Álvarez gets around 14 mm of rain over 3.7 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 12% and peaks near 23% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
123
221
320
419
518
617
716
816
915
1014
1113
1213
1312
1411
1511
1610
1710
189
199
209
218
228
238
248
258
268
278
288
297
307
317

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 53% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
102186911
202206810
30221689
40223669
50225658
60226657
70228637
80330616
90332596
100333595
110335575
120336565
130337564
140338554
150339544
160440533
170441523
180442513
190543503
200543492
210544482
220645472
231646462
241746451
251847441
261947421
271947411
2811048401
2911148391
3011148381
3111249381

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

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

Days grow by about 0 minutes over December. Sunrise moves from 7:00 AM to 7:15 AM, and sunset from 6:03 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:006:03
211.07:016:03
311.07:016:03
411.07:026:03
511.07:026:04
611.07:036:04
711.07:046:04
811.07:046:04
911.07:056:05
1011.07:056:05
1111.07:066:05
1211.07:066:06
1311.07:076:06
1411.07:086:06
1511.07:086:07
1611.07:096:07
1711.07:096:08
1811.07:106:08
1911.07:106:08
2011.07:116:09
2111.07:116:09
2211.07:126:10
2311.07:126:10
2411.07:126:11
2511.07:136:11
2611.07:136:12
2711.07:146:12
2811.07:146:13
2911.07:156:13
3011.07:156:14
3111.07:156:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.92 kWh/m².

For context, solar energy here swings from a low near 4.71 kWh/m² to a high of 7.33 kWh/m² in April across the year — December's 4.92 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in December

Hazard calendar for Atoyac de Álvarez

In seasonPeak

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

Atoyac de Álvarez sits in the eastern Pacific hurricane zone; the season peaks August–September.

Atoyac de Álvarez's monsoon runs June–October, 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 Atoyac de Álvarez?

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

7.8
Sightseeing
3rd-best month of the year
8.0
Beach & pool
5th-best month of the year

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

What to pack for Atoyac de Álvarez in December

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

In December, Atoyac de Álvarez sees daytime highs around 27°C and nights near 19°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Atoyac de Álvarez in December

The nearest coast averages about 29°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 22 km away) is warmest in August at about 30°C and coldest in April near 27°C.

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

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb28Warm
Mar27Warm
Apr27Warm
May29Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov30Tropical
Dec29Tropical

UV index in Atoyac de Álvarez 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 Atoyac de Álvarez peaks around March 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 highExtremeVery highMar 21UV 13Dec 13UV 7
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Atoyac de Álvarez 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 Atoyac de Álvarez is worst in May — around 39 µg/m³ PM2.5 (poor), about 7.0× the cleanest month (February, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodMay 1636 µg/m³Feb 136 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb6Good
Mar7Good
Apr17Moderate
May39Poor
Jun12Moderate
Jul14Moderate
Aug10Good
Sep9Good
Oct9Good
Nov7Good
Dec7Good
Location & terrain

Where is Atoyac de Álvarez?

Atoyac de Álvarez sits at 17.2°N, 100.4°W, 59 m above sea level, in Mexico. The nearest listed city is Técpan de Galeana, 21 km away.

Topography around Atoyac de Álvarez

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

Within 3 km, the terrain around Atoyac de Álvarez has significant variations in elevation — a maximum elevation change of 302 m around an average of 73 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,522 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,534 m.

The land around Atoyac de Álvarez is covered by grassland (38%) and trees (36%) within 3 km, trees (56%) and grassland (26%) within 16 km, and trees (55%) and water (29%) within 80 km.

3 km
302 m
16 km
1,522 m
80 km
3,534 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Técpan de Galeana 21 km · Acapulco 68 km · Petatlán 96 km · Chilpancingo 106 km · Zumpango del Río 108 km · Tixtla de Guerrero 117 km · Arcelia 125 km · Zihuatanejo 128 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 Atoyac de Álvarez (17.2067°, -100.4331°, elevation 59 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).