El Grullo weather in December

In December, El Grullo sees average daytime highs of 27°C and overnight lows near 12°C, with 14 mm of rain across 1.8 wet days and about 10.8 hours of daylight. It is the 11th-warmest and 10th-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 55% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of December to 10 h 48 min by month's end. Set against the rest of the year, December is El Grullo's 7th-clearest and 6th-windiest month. For the whole year in context, see El Grullo's year-round climate.

Daytime high
27°
11th warmest
Overnight low
12°
3rd coldest
Rainfall
14 mm
1.8 wet days
Daylight
10 h 48 min
7:29 AM – 6:17 PM
Cloud cover
41%
7th clearest
Wind
4 km/h
6th windiest
Solar energy
4.71 kWh/m²
Travel score
8.0
out of 10

El Grullo is municipal seat of El Grullo, State of Jalisco, Mexico.

Density
3,487/km²
people per km²
Founded
1830

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 El Grullo reaches about 27°C in the afternoon and slips back to 12°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12813
22813
32813
42813
52813
62813
72813
82713
92713
102713
112713
122712
132712
142712
152712
162712
172712
182712
192712
202712
212712
222712
232712
242712
252712
262712
272712
282712
292712
302712
312712

How December really feels in El Grullo

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.

El Grullo weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 12°27210.98.1
Feb28° / 12°211.711.37.5
Mar30° / 13°121.311.96.6
Apr31° / 14°5112.45.5
May32° / 17°215.312.94.7
Jun29° / 19°16321.913.23.8
Jul28° / 18°20228.413.13.6
Aug28° / 18°21128.612.73.6
Sep28° / 18°2162612.13.9
Oct28° / 17°9915.111.55.5
Nov28° / 15°244.211.17.4
Dec27° / 12°141.810.88.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17624
27624
37525
47426
57327
67327
77228
87228
97129
107129
117030
127030
137030
146931
156931
166931
176832
186832
196832
206733
216733
226634
236634
246436
256436
266337
276337
286337
296337
306337
316337

Chance of precipitation in December

Any precipitation

El Grullo gets around 14 mm of rain over 1.8 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 5% and peaks near 6% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
16
26
36
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
206
216
226
236
246
256
266
276
286
296
306
316

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 67% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15039101
2513991
3513991
4523981
5533881
6553870
7563770
8573670
9593560
10603460
11623350
12633250
13653140
14663040
15672940
16692830
17702730
18722620
19732520
20742420
21752320
22752320
23772210
24772210
25782110
26782110
27792010
28801910
29811810
30821710
31821710

Wind in December

Winds average 4 km/h in December.

Across December, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 54 min at the start of December to 10 h 48 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 7:20 AM to 7:35 AM, and sunset from 6:13 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:206:13
210.97:216:13
310.97:216:14
410.97:226:14
510.97:226:14
610.97:236:14
710.87:246:14
810.87:246:15
910.87:256:15
1010.87:256:15
1110.87:266:16
1210.87:276:16
1310.87:276:16
1410.87:286:17
1510.87:286:17
1610.87:296:17
1710.87:296:18
1810.87:306:18
1910.87:306:19
2010.87:316:19
2110.87:316:19
2210.87:326:20
2310.87:326:20
2410.87:336:21
2510.87:336:21
2610.87:346:22
2710.87:346:22
2810.87:346:23
2910.87:356:23
3010.87:356:24
3110.87:356:25

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.71 kWh/m².

For context, solar energy here swings from a low near 4.7 kWh/m² to a high of 7.46 kWh/m² in April across the year — December's 4.71 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for El Grullo

In seasonPeak

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

El Grullo'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 El Grullo?

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

8.0
Sightseeing
2nd-best month of the year
8.2
Beach & pool
4th-best month of the year

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

What to pack for El Grullo in December

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

In December, El Grullo sees daytime highs around 27°C and nights near 12°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in El Grullo 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 El Grullo peaks around April 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 22UV 13Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in El Grullo 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 El Grullo is worst in May — around 48 µg/m³ PM2.5 (poor), about 5.2× the cleanest month (February, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodMay 1745 µg/m³Feb 109 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb9Good
Mar10Good
Apr20Moderate
May48Poor
Jun20Moderate
Jul12Good
Aug10Good
Sep10Good
Oct10Good
Nov10Good
Dec10Good
Location & terrain

Where is El Grullo?

El Grullo sits at 19.8°N, 104.2°W, 853 m above sea level, in Mexico. The nearest listed city is Autlán de Navarro, 16 km away.

Topography around El Grullo

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

Within 3 km, the terrain around El Grullo has significant variations in elevation — a maximum elevation change of 423 m around an average of 914 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,342 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,211 m.

The land around El Grullo is covered by cropland (37%) and trees (34%) within 3 km, trees (39%) and shrubs (25%) within 16 km, and trees (65%) within 80 km.

3 km
423 m
16 km
1,342 m
80 km
4,211 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Autlán de Navarro 16 km · Sayula 65 km · El Salto 66 km · Cihuatlán 73 km · Cocula 75 km · Manzanillo 78 km · Ciudad de Villa de Álvarez 78 km · Ciudad Guzmán 80 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 El Grullo (19.8067°, -104.2163°, elevation 853 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).