Santiago weather in December

In December, Santiago sees average daytime highs of 27°C and overnight lows near 22°C, with 158 mm of rain across 16.1 wet days and about 11 hours of daylight. It is the 11th-warmest and 6th-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 11% of the time in December, and the air most often feels oppressive.

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 Santiago's 9th-clearest and 1st-windiest month. For the whole year in context, see Santiago's year-round climate.

Daytime high
27°
11th warmest
Overnight low
22°
3rd coldest
Rainfall
158 mm
16.1 wet days
Daylight
11 hours
6:20 AM – 5:20 PM
Cloud cover
75%
9th clearest
Wind
5 km/h
1st windiest
Solar energy
2.48 kWh/m²
Travel score
5.3
out of 10

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 Santiago reaches about 27°C in the afternoon and slips back to 22°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 30°C. Set against its neighbours, December runs about 2°C cooler than November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12822
22822
32822
42822
52822
62822
72822
82822
92822
102822
112822
122822
132822
142722
152722
162722
172722
182722
192722
202722
212722
222721
232721
242721
252721
262721
272721
282721
292721
302721
312721

How December really feels in Santiago

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.

Santiago weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 21°651111.16.2
Feb28° / 21°529.611.46.0
Mar30° / 22°6110.811.95.0
Apr32° / 23°6111.112.43.7
May34° / 24°16117.412.82.5
Jun34° / 25°13818.6132.2
Jul33° / 24°2232412.92.2
Aug33° / 24°20522.812.62.5
Sep32° / 24°21922.812.12.7
Oct31° / 24°18619.611.63.6
Nov29° / 23°15318.411.24.2
Dec27° / 22°15816.1115.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% 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 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33367
43268
53268
63268
73268
83070
93070
103070
113070
122971
132971
142971
153070
162971
172971
182971
192971
202872
212872
222773
232773
242773
252773
262773
272773
282971
292971
302971
313070

Chance of precipitation in December

Any precipitation

Santiago gets around 158 mm of rain over 16.1 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 51% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
156
256
356
456
556
657
757
857
957
1057
1157
1257
1356
1456
1555
1654
1753
1852
1951
2050
2149
2248
2347
2446
2545
2643
2742
2841
2940
3039
3138

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1221743
2222733
3223723
4224722
5224722
6125722
7125722
8226702
9226702
10227692
11227692
12228691
13229681
14230671
15331651
16331651
17332641
18433621
19534601
20535591
21636571
22737551
23738541
24839521
25939511
26940510
271041490
281041480
291042470
301143460
311144450

Wind in December

Winds average 5 km/h in December, the windiest month of the year.

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 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 6:11 AM to 6:26 AM, and sunset from 5:16 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:115:16
211.16:125:16
311.16:125:16
411.16:135:16
511.16:145:17
611.06:145:17
711.06:155:17
811.06:155:17
911.06:165:18
1011.06:165:18
1111.06:175:18
1211.06:185:19
1311.06:185:19
1411.06:195:19
1511.06:195:20
1611.06:205:20
1711.06:205:21
1811.06:215:21
1911.06:215:22
2011.06:225:22
2111.06:225:22
2211.06:235:23
2311.06:235:23
2411.06:245:24
2511.06:245:24
2611.06:245:25
2711.06:255:25
2811.06:255:26
2911.06:265:26
3011.06:265:27
3111.06:265:27

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.48 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 5.76 kWh/m² in April across the year — December's 2.48 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.7Moderate
32.7Moderate
42.7Moderate
52.6Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.5Moderate
102.5Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.7Moderate
Planning a trip in December

Is December a good time to visit Santiago?

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

5.3
Sightseeing
3rd-best month of the year
5.6
Beach & pool
5th-best month of the year

December is a reasonable time to visit Santiago for sightseeing.

What to pack for Santiago in December

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

In December, Santiago sees daytime highs around 27°C and nights near 22°C. Pack light clothes and rain gear. About 16 days see rain.

light clothesrain gear

UV index in Santiago 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 Santiago peaks around August 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 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 19UV 14Dec 11UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar12Extreme
Apr13Extreme
May13Extreme
Jun13Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Santiago 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 Santiago is worst in April — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1616 µg/m³Dec 1611 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Good
Mar15Moderate
Apr17Moderate
May14Moderate
Jun13Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct13Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Santiago?

Santiago sits at 16.7°N, 121.5°E, 78 m above sea level, in Philippines. The nearest listed city is Ramon, 11 km away.

Topography around Santiago

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

Within 3 km, the terrain around Santiago has only modest variations in elevation — a maximum elevation change of 31 m around an average of 81 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 768 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,898 m.

The land around Santiago is covered by cropland (47%), trees (28%) and artificial surfaces (21%) within 3 km, cropland (63%) and trees (28%) within 16 km, and trees (70%) within 80 km.

3 km
31 m
16 km
768 m
80 km
2,898 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Ramon 11 km · Alicia 19 km · Diadi 21 km · San Mateo 22 km · Aglipay 24 km · Baggabag B 43 km · Solano 43 km · Lagawe 47 km

Philippines travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 60 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$4,171
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
48%
of population, 2024
Homicide rate
4.3
per 100k, 2023
Road deaths
12
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 569
Religion
Roman Catholic 79%other 8%Muslim 6%other Christian 4%

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 Santiago (16.6881°, 121.5487°, elevation 78 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).