Rosario weather in December

In December, Rosario sees average daytime highs of 29°C and overnight lows near 24°C, with 187 mm of rain across 17 wet days and about 11.2 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 23% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 18 min at the start of December to 11 h 12 min by month's end. Set against the rest of the year, December is Rosario's 5th-clearest and 1st-windiest month. For the whole year in context, see Rosario's year-round climate.

Daytime high
29°
11th warmest
Overnight low
24°
4th coldest
Rainfall
187 mm
17 wet days
Daylight
11 h 12 min
6:15 AM – 5:27 PM
Cloud cover
66%
5th clearest
Wind
14 km/h
1st windiest
Solar energy
4.14 kWh/m²
Travel score
4.7
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical December day in Rosario reaches about 29°C in the afternoon and slips back to 24°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12924
22924
32924
42924
52924
62924
72924
82924
92924
102924
112924
122924
132924
142924
152924
162924
172924
182924
192924
202924
212924
222924
232924
242824
252824
262824
272824
282824
292824
302824
312823

How December really feels in Rosario

Once humidity and wind are folded in, December averages 19 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
19
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.

Rosario 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
Jan29° / 23°4910.211.35.6
Feb29° / 23°447.611.55.5
Mar31° / 24°509.811.94.8
Apr32° / 25°5210.612.33.8
May33° / 25°15020.812.62.8
Jun32° / 25°21924.912.82.6
Jul31° / 25°33927.712.72.7
Aug30° / 25°2702612.52.8
Sep30° / 24°32927.112.12.7
Oct30° / 24°23624.611.73.2
Nov30° / 24°14519.911.43.9
Dec29° / 24°1871711.24.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44357
54357
64357
74456
84456
94456
104555
114555
124555
134555
144456
154555
164555
174555
184555
194555
204555
214456
224456
234357
244456
254456
264456
274456
284456
294456
304654
314753

Chance of precipitation in December

Any precipitation

Rosario gets around 187 mm of rain over 17 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 53% and peaks near 61% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
161
261
361
461
561
661
761
861
961
1061
1160
1259
1358
1457
1556
1655
1753
1852
1951
2050
2149
2248
2348
2447
2546
2645
2744
2842
2941
3040
3139

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 70% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1056233
2056332
3056431
4046630
5046630
6046729
7046729
8046828
9046927
10047026
11047125
12047224
13057223
14057322
15067321
16077320
17087319
18097318
190107317
200127216
210137215
221147114
231157113
241167112
251177111
261177210
271187110
28119719
29119728
30119728
31120727

Wind in December

Winds average 14 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 18 min at the start of December to 11 h 12 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 6:07 AM to 6:22 AM, and sunset from 5:22 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:075:22
211.26:085:23
311.26:085:23
411.26:095:23
511.26:095:23
611.26:105:24
711.26:115:24
811.26:115:24
911.26:125:25
1011.26:125:25
1111.26:135:25
1211.26:135:26
1311.26:145:26
1411.26:145:26
1511.26:155:27
1611.26:155:27
1711.26:165:28
1811.26:165:28
1911.26:175:29
2011.26:175:29
2111.26:185:29
2211.26:185:30
2311.26:195:30
2411.26:195:31
2511.26:205:31
2611.26:205:32
2711.26:205:32
2811.26:215:33
2911.26:215:33
3011.26:225:34
3111.26:225:34

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.14 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 6.7 kWh/m² in April across the year — December's 4.14 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.2Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.2Bright
104.1Bright
114.1Bright
124.1Bright
134.1Bright
144.1Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in December

Hazard calendar for Rosario

In seasonPeak

In December, Rosario sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Rosario sits in the Pacific typhoon belt; the season peaks July–October.

Rosario's rainy season runs June–October, when most of the year's rain falls.

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

Is December a good time to visit Rosario?

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

4.7
Sightseeing
4th-best month of the year
5.9
Beach & pool
5th-best month of the year

December is a reasonable time to visit Rosario for sightseeing.

What to pack for Rosario in December

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

In December, Rosario sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. About 17 days see rain.

light clothesrain gear

Sea temperature near Rosario in December

The nearest coast averages about 27°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 June at about 30°C and coldest in February near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar27Warm
Apr28Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Rosario in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosario peaks around August 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 17UV 14Dec 11UV 9
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar12Extreme
Apr13Extreme
May13Extreme
Jun13Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec9Very high
Location & terrain

Where is Rosario?

Rosario sits at 13.6°N, 121.2°E, 13 m above sea level, in Philippines. The nearest listed city is Batangas, 22 km away.

Topography around Rosario

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

Within 3 km, the terrain around Rosario has significant variations in elevation — a maximum elevation change of 299 m around an average of 24 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 986 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,538 m.

The land around Rosario is covered by trees (47%) and water (40%) within 3 km, trees (50%) and water (48%) within 16 km, and trees (44%) and water (44%) within 80 km.

3 km
299 m
16 km
986 m
80 km
2,538 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: Batangas 22 km · Calapan 25 km · Bauan 29 km · San Pascual 29 km · Puerto Galera 32 km · Lipa City 35 km · Cuenca 35 km · Bignay Uno 39 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 Rosario (13.6323°, 121.2207°, elevation 13 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).