Santiago de Tolú weather in December

In December, Santiago de Tolú sees average daytime highs of 31°C and overnight lows near 24°C, with 87 mm of rain across 18 wet days and about 11.5 hours of daylight. It is the 7th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 28% of the time in December, and the air most often feels miserable.

Daylight stretches from about 11 h 30 min at the start of December to 11 h 30 min by month's end. Set against the rest of the year, December is Santiago de Tolú's 4th-clearest and 8th-windiest month. For the whole year in context, see Santiago de Tolú's year-round climate.

Daytime high
31°
7th warmest
Overnight low
24°
4th coldest
Rainfall
87 mm
18 wet days
Daylight
11 h 24 min
6:15 AM – 5:42 PM
Cloud cover
61%
4th clearest
Wind
7 km/h
8th windiest
Solar energy
4.88 kWh/m²
Travel score
3.7
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical December day in Santiago de Tolú reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13024
23024
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124
313124

How December really feels in Santiago de Tolú

Once humidity and wind are folded in, December averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Santiago de Tolú weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°277.811.54.6
Feb32° / 25°317.811.74.2
Mar32° / 25°6615.511.93.5
Apr31° / 25°16725.612.22.7
May31° / 25°26329.512.42.4
Jun31° / 25°24928.112.52.4
Jul31° / 25°2282812.52.5
Aug31° / 25°2392912.32.5
Sep30° / 24°24029.112.12.5
Oct30° / 24°24029.811.82.6
Nov30° / 24°18027.211.62.8
Dec31° / 24°871811.53.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% 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 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12872
22872
33070
43070
53070
63070
73169
83268
93367
103466
113565
123763
133862
144060
154357
164456
174654
184753
195050
205149
215347
225545
235644
245743
255842
265941
276040
286139
296238
306337
316436

Chance of precipitation in December

Any precipitation

Santiago de Tolú gets around 87 mm of rain over 18 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 59% and peaks near 77% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
177
276
375
475
574
673
773
872
971
1070
1169
1268
1366
1465
1563
1661
1759
1857
1955
2053
2151
2249
2347
2445
2543
2641
2740
2839
2938
3038
3137

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the miserable band about 63% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
102971
202971
302971
402971
502971
602971
702971
803070
903070
1003169
1103169
1203268
1303367
1403466
1503565
1603664
1703763
1803862
1903961
2004060
2104159
2204258
2304357
2404357
2504456
2604555
2714653
2814752
2914851
3015050
3115148

Wind in December

Winds average 7 km/h in December.

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 11 h 30 min at the start of December to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:08 AM to 6:22 AM, and sunset from 5:37 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:085:37
211.56:085:37
311.56:095:37
411.56:095:37
511.56:105:38
611.56:105:38
711.56:115:38
811.56:115:39
911.56:125:39
1011.56:125:39
1111.56:135:40
1211.56:135:40
1311.56:145:41
1411.46:145:41
1511.46:155:41
1611.46:155:42
1711.46:165:42
1811.46:165:43
1911.46:175:43
2011.46:175:44
2111.46:185:44
2211.46:185:45
2311.46:185:45
2411.46:195:46
2511.46:195:46
2611.46:205:47
2711.46:205:47
2811.46:215:48
2911.46:215:48
3011.46:225:49
3111.56:225:49

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.88 kWh/m².

For context, solar energy here swings from a low near 4.49 kWh/m² to a high of 5.9 kWh/m² in March across the year — December's 4.88 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in December

Is December a good time to visit Santiago de Tolú?

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

3.7
Sightseeing
3rd-best month of the year
5.5
Beach & pool
4th-best month of the year

December is a weaker month for outdoor sightseeing in Santiago de Tolú.

What to pack for Santiago de Tolú in December

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

In December, Santiago de Tolú sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Santiago de Tolú 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 offshore is warmest in July at about 30°C and coldest in March near 28°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
Feb28Tropical
Mar28Tropical
Apr29Tropical
May29Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Santiago de Tolú in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santiago de Tolú peaks around June 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highJun 10UV 13Dec 13UV 10
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar12Extreme
Apr12Extreme
May13Extreme
Jun13Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov10Very high
Dec10Very high

Air quality in Santiago de Tolú 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 de Tolú is worst in July — around 26 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (November, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateMar 2325 µg/m³Nov 1111 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb18Moderate
Mar26Moderate
Apr25Moderate
May25Moderate
Jun23Moderate
Jul26Moderate
Aug20Moderate
Sep14Moderate
Oct12Good
Nov11Good
Dec14Moderate
Location & terrain

Where is Santiago de Tolú?

Santiago de Tolú sits at 9.5°N, 75.6°W, 10 m above sea level, in Colombia. The nearest listed city is Tolú Viejo, 18 km away.

Topography around Santiago de Tolú

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

Within 3 km, the terrain around Santiago de Tolú has only modest variations in elevation — a maximum elevation change of 19 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 156 m; within 80 km, large variations in elevation — a maximum elevation change of 810 m.

The land around Santiago de Tolú is covered by grassland (44%) and water (42%) within 3 km, grassland (43%) and water (43%) within 16 km, and grassland (47%), water (28%) and trees (20%) within 80 km.

3 km
19 m
16 km
156 m
80 km
810 m
treesgrasslandartificial surfaceswaterwetlandmangroves
December weather nearby: Tolú Viejo 18 km · San Onofre 24 km · San Antero 26 km · Sincelejo 32 km · Momil 33 km · Corozal 39 km · Lorica 41 km · Sampués 44 km

Colombia travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
120 / 240 V · 60 Hz
Prices
≈ 38% of US
price level, 2025
GDP per capita
$8,562
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
74%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
15.4
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 480
Religion
Roman Catholic 64%Protestant 17%none 14%atheist 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 Santiago de Tolú (9.5239°, -75.5814°, elevation 10 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).