El Monte weather in December

In December, El Monte sees average daytime highs of 28°C and overnight lows near 13°C, with 5 mm of rain across 0.8 wet days and about 14.2 hours of daylight. It is the 3rd-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 29°C by the end. The sky is clear or mostly clear about 83% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is El Monte's 3rd-clearest and 1st-windiest month. For the whole year in context, see El Monte's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
13°
10th coldest
Rainfall
5 mm
0.8 wet days
Daylight
14 h 12 min
6:33 AM – 8:47 PM
Cloud cover
17%
3rd clearest
Wind
7 km/h
1st windiest
Solar energy
8.91 kWh/m²
Travel score
8.4
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 26°C in the first days to 29°C by the end.

A typical December day in El Monte reaches about 28°C in the afternoon and slips back to 13°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12612
22612
32712
42712
52712
62712
72713
82713
92713
102713
112713
122713
132713
142713
152713
162813
172813
182813
192813
202813
212814
222814
232814
242814
252814
262814
272814
282814
292914
302914
312914

El Monte weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 15°30.6147.5
Feb28° / 14°50.813.38.0
Mar27° / 12°111.412.38.7
Apr22° / 393.811.28.0
May18° / 826.310.36.3
Jun15° / 1448.89.84.5
Jul15° / 987.3104.6
Aug16° / 82710.75.5
Sep18° / 495.711.86.6
Oct21° / 293.712.87.7
Nov25° / 11°11213.78.8
Dec28° / 13°50.814.28.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 83% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 8% of December, with mostly cloudy or overcast conditions the remaining 9%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18812
28812
38812
48812
58911
69010
79010
89010
99010
109010
119010
12928
13928
14928
15928
16928
17928
18919
19919
20919
21919
22919
23919
24919
25928
26928
27928
28928
29928
30928
31928

Chance of precipitation in December

Any precipitation

El Monte gets around 5 mm of rain over 0.8 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 3% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
53
63
73
83
93
103
113
123
133
143
152
162
172
182
192
202
212
222
232
242
252
262
272
282
292
302
312

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 87% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1973
2964
3964
4964
5955
6946
7946
8937
9928
10919
119010
129010
138911
148812
158713
168713
178614
188515
198515
208416
218416
228317
238317
248218
258218
268119
278119
288119
298119
308119
318020

Wind in December

Winds average 7 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:31 AM to 6:41 AM, and sunset from 8:36 PM to 8:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.16:318:36
214.16:318:37
314.16:318:38
414.16:318:38
514.16:318:39
614.16:318:40
714.26:318:41
814.26:328:41
914.26:328:42
1014.26:328:43
1114.26:328:44
1214.26:328:44
1314.26:328:45
1414.26:338:46
1514.26:338:46
1614.26:338:47
1714.26:348:47
1814.26:348:48
1914.26:348:49
2014.26:358:49
2114.26:358:50
2214.26:368:50
2314.26:368:51
2414.26:378:51
2514.26:378:51
2614.26:388:52
2714.26:388:52
2814.26:398:52
2914.26:408:53
3014.26:408:53
3114.26:418:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.91 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 8.91 kWh/m² in December across the year — December's 8.91 kWh/m² sits near the top of that range.

0246810151015202531
Solar energy (kWh/m²)Level
18.6Intense
28.7Intense
38.7Intense
48.7Intense
58.7Intense
68.7Intense
78.8Intense
88.8Intense
98.8Intense
108.8Intense
118.8Intense
128.8Intense
138.9Intense
148.9Intense
158.9Intense
168.9Intense
178.9Intense
188.9Intense
198.9Intense
209.0Intense
219.0Intense
229.0Intense
239.0Intense
249.0Intense
259.0Intense
269.0Intense
279.0Intense
289.0Intense
299.0Intense
309.0Intense
319.0Intense
Planning a trip in December

Hazard calendar for El Monte

In seasonPeak

None of El Monte'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 Monte's rainy season runs May–August, when most of the year's rain falls.

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

Is December a good time to visit El Monte?

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

8.4
Sightseeing
3rd-best month of the year
8.9
Beach & pool
3rd-best month of the year

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

What to pack for El Monte in December

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

In December, El Monte sees daytime highs around 28°C and nights near 13°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near El Monte in December

The nearest coast averages about 15°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 60 km away) is warmest in February at about 16°C and coldest in August near 12°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°12°14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr14Bracing
May14Bracing
Jun13Bracing
Jul13Bracing
Aug12Bracing
Sep12Bracing
Oct13Bracing
Nov13Bracing
Dec15Bracing

UV index in El Monte in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in El Monte peaks around January 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateVery highExtremeJan 17UV 13Jun 15UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr5Moderate
May3Moderate
Jun3Moderate
Jul3Moderate
Aug3Moderate
Sep6High
Oct9Very high
Nov10Extreme
Dec12Extreme

Air quality in El Monte 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 Monte is worst in July — around 88 µg/m³ PM2.5 (unhealthy), about 2.5× the cleanest month (February, 35 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorJul 1287 µg/m³Feb 1836 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb35Moderate
Mar40Poor
Apr58Unhealthy
May83Unhealthy
Jun85Unhealthy
Jul88Unhealthy
Aug77Unhealthy
Sep64Unhealthy
Oct45Poor
Nov37Poor
Dec38Poor
Location & terrain

Where is El Monte?

El Monte sits at 33.7°S, 71.0°W, 300 m above sea level, in Chile. The nearest listed city is Talagante, 6.0 km away.

Topography around El Monte

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

Within 3 km, the terrain around El Monte has only modest variations in elevation — a maximum elevation change of 177 m around an average of 292 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,156 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,382 m.

The land around El Monte is covered by trees (38%) and cropland (31%) within 3 km, shrubs (35%) and trees (25%) within 16 km, and shrubs (26%) and grassland (25%) within 80 km.

3 km
177 m
16 km
1,156 m
80 km
4,382 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Talagante 6.0 km · Peñaflor 13 km · Padre Hurtado 21 km · Melipilla 21 km · Buin 23 km · Paine 27 km · Maipú 27 km · San Bernardo 28 km

Chile travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / L
220 V · 50 Hz
Prices
≈ 48% of US
price level, 2025
GDP per capita
$17,995
2025
Happiness
6.3 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
6.3
per 100k, 2023
Road deaths
14.9
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 517
Religion
Catholic 57%none 26%Evangelical or Protestant 16%other Christians and traditions related to Christ 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 Monte (-33.6797°, -70.9848°, elevation 300 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. 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).