Santa Rosa de Osos weather in December

In December, Santa Rosa de Osos sees average daytime highs of 21°C and overnight lows near 12°C, with 174 mm of rain across 22.4 wet days and about 11.6 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 4% of the time in December, and the air most often feels comfortable.

Daylight stretches from about 11 h 36 min at the start of December to 11 h 36 min by month's end. Set against the rest of the year, December is Santa Rosa de Osos's 3rd-clearest and 8th-windiest month. For the whole year in context, see Santa Rosa de Osos's year-round climate.

Daytime high
21°
11th warmest
Overnight low
12°
3rd coldest
Rainfall
174 mm
22.4 wet days
Daylight
11 h 36 min
6:10 AM – 5:46 PM
Cloud cover
82%
3rd clearest
Wind
3 km/h
8th windiest
Solar energy
4.62 kWh/m²
Travel score
4.4
out of 10
Founded
1636

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 21°C through the month.

A typical December day in Santa Rosa de Osos reaches about 21°C in the afternoon and slips back to 12°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 23°C. Set against its neighbours, December runs on par with November and on par with January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12113
22113
32113
42113
52113
62113
72113
82113
92113
102113
112113
122113
132113
142112
152112
162112
172112
182112
192112
202112
212112
222112
232112
242112
252112
262112
272112
282112
292112
302112
312112

Santa Rosa de Osos weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 12°10819.411.75.0
Feb21° / 12°16821.611.84.3
Mar21° / 13°31327.9123.7
Apr22° / 13°42627.712.13.5
May22° / 13°4142712.33.8
Jun22° / 13°20720.412.44.5
Jul22° / 13°16218.112.35.1
Aug23° / 13°18717.412.25.1
Sep22° / 13°30423.1124.2
Oct21° / 13°38428.211.93.6
Nov21° / 13°33127.511.73.5
Dec21° / 12°17422.411.64.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 86%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1496
2595
3595
4694
5694
6694
7793
8793
9793
10892
111090
121090
131288
141288
151387
161486
171585
181585
191684
201783
211783
221882
231981
242080
252278
262278
272278
282278
292476
302476
312575

Chance of precipitation in December

Any precipitation

Santa Rosa de Osos gets around 174 mm of rain over 22.4 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 73% and peaks near 83% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
183
283
382
482
582
681
781
880
980
1079
1179
1278
1377
1476
1576
1675
1774
1872
1971
2070
2169
2267
2366
2464
2563
2662
2761
2860
2959
3059
3159

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the comfortable band about 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19901
29901
39901
49901
59901
69901
79901
89901
910900
1010900
1111890
1212871
1313861
1414851
1516831
1617821
1719801
1821781
1922771
2024751
2126731
2228711
2330700
2432680
2533670
2635650
2736640
2837630
2938620
3038620
3139610

Wind in December

Winds average 3 km/h in December.

Across December, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm
313calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 36 min at the start of December to 11 h 36 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 6:02 AM to 6:16 AM, and sunset from 5:41 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:025:41
211.66:035:41
311.66:035:41
411.66:045:42
511.66:045:42
611.66:055:42
711.66:055:43
811.66:065:43
911.66:065:44
1011.66:075:44
1111.66:075:44
1211.66:085:45
1311.66:085:45
1411.66:095:46
1511.66:095:46
1611.66:105:46
1711.66:105:47
1811.66:105:47
1911.66:115:48
2011.66:115:48
2111.66:125:49
2211.66:125:49
2311.66:135:50
2411.66:135:50
2511.66:145:51
2611.66:145:51
2711.66:155:52
2811.66:155:52
2911.66:165:53
3011.66:165:53
3111.66:165:54

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.62 kWh/m².

For context, solar energy here swings from a low near 4.29 kWh/m² to a high of 5.77 kWh/m² in August across the year — December's 4.62 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.7Bright
214.7Bright
224.7Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in December

Is December a good time to visit Santa Rosa de Osos?

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

4.4
Sightseeing
5th-best month of the year
2.8
Beach & pool
6th-best month of the year

December is a reasonable time to visit Santa Rosa de Osos for sightseeing.

What to pack for Santa Rosa de Osos in December

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

In December, Santa Rosa de Osos sees daytime highs around 21°C and nights near 12°C. Pack rain gear. Worth having: sun protection. About 22 days see rain.

rain gearsun protection

UV index in Santa Rosa de Osos 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 Santa Rosa de Osos peaks around February 22 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 12 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 16Dec 12UV 12
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar16Extreme
Apr13Extreme
May15Extreme
Jun14Extreme
Jul13Extreme
Aug13Extreme
Sep14Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Santa Rosa de Osos 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 Santa Rosa de Osos is worst in March — around 25 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateMar 1525 µg/m³Oct 2112 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb20Moderate
Mar25Moderate
Apr17Moderate
May14Moderate
Jun13Moderate
Jul13Moderate
Aug13Moderate
Sep12Moderate
Oct12Good
Nov12Good
Dec13Moderate
Location & terrain

Where is Santa Rosa de Osos?

Santa Rosa de Osos sits at 6.6°N, 75.5°W, 2,586 m above sea level, in Colombia. The nearest listed city is Barbosa, 27 km away.

Topography around Santa Rosa de Osos

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Rosa de Osos.

Within 3 km, the terrain around Santa Rosa de Osos has only modest variations in elevation — a maximum elevation change of 172 m around an average of 2,540 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,113 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,807 m.

The land around Santa Rosa de Osos is covered by grassland (77%) within 3 km, grassland (63%) and trees (36%) within 16 km, and trees (63%) and grassland (35%) within 80 km.

3 km
172 m
16 km
1,113 m
80 km
3,807 m
treesgrasslandartificial surfaceswater
December weather nearby: Barbosa 27 km · Copacabana 34 km · Yarumal 35 km · Bello 36 km · Santa Fe de Antioquia 42 km · San Vicente 43 km · Medellin 46 km · Itagüí 54 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 Santa Rosa de Osos (6.6474°, -75.4603°, elevation 2,586 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).