Olongapo weather in December

In December, Olongapo sees average daytime highs of 29°C and overnight lows near 24°C, with 67 mm of rain across 6.6 wet days and about 11.1 hours of daylight. It is the 8th-warmest and 8th-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 33% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 12 min at the start of December to 11 h 06 min by month's end. Set against the rest of the year, December is Olongapo's 5th-clearest and 1st-windiest month. For the whole year in context, see Olongapo's year-round climate.

Daytime high
29°
8th warmest
Overnight low
24°
4th coldest
Rainfall
67 mm
6.6 wet days
Daylight
11 h 06 min
6:21 AM – 5:29 PM
Cloud cover
59%
5th clearest
Wind
14 km/h
1st windiest
Solar energy
4.36 kWh/m²
Travel score
6.1
out of 10

Olongapo is highly urbanized city in Central Luzon, Philippines.

Density
1,196/km²
people per km²
Founded
1750

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 29°C through the month.

A typical December day in Olongapo reaches about 29°C in the afternoon and slips back to 24°C overnight — a 4°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 on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12925
22925
32925
42925
52925
62924
72924
82924
92924
102924
112924
122924
132924
142924
152924
162924
172924
182924
192824
202824
212824
222824
232824
242824
252824
262824
272824
282824
292824
302824
312824

How December really feels in Olongapo

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.

Olongapo weather by month

How December compares with the rest of the year at a glance. December is the 8th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 23°172.511.26.9
Feb29° / 23°192.811.56.7
Mar30° / 24°233.811.96.1
Apr31° / 25°275.512.35.2
May30° / 26°1851912.73.8
Jun29° / 26°36125.712.93.2
Jul28° / 25°57129.512.83.1
Aug28° / 25°56529.412.53.3
Sep28° / 25°43627.712.13.2
Oct29° / 25°22520.311.74.1
Nov29° / 25°869.311.35.4
Dec29° / 24°676.611.16.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 20% of December, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25446
35446
45446
55446
65545
75545
85545
95545
105446
115446
125446
135446
145347
155248
165248
175248
185149
195149
205050
214951
224951
235050
245050
255149
265248
275248
285347
295446
305545
315545

Chance of precipitation in December

Any precipitation

Olongapo gets around 67 mm of rain over 6.6 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 21% and peaks near 25% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
123
224
324
424
525
625
725
825
925
1024
1124
1224
1324
1423
1522
1622
1721
1820
1920
2019
2119
2218
2318
2417
2517
2616
2715
2814
2914
3013
3113

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1122752
2124732
3125722
4126712
5127702
6128692
7028702
8029692
9029692
10030682
11131662
12131662
13132652
14133642
15134632
16235621
17236611
18236611
19337591
20438571
21439561
22540541
23542521
24643501
25644491
26745481
27746471
28747451
29748441
30849430
31850420

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
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light 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 12 min at the start of December to 11 h 06 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 6:13 AM to 6:28 AM, and sunset from 5:24 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:135:24
211.26:145:24
311.26:145:25
411.26:155:25
511.26:155:25
611.26:165:25
711.26:165:26
811.16:175:26
911.16:185:26
1011.16:185:27
1111.16:195:27
1211.16:195:27
1311.16:205:28
1411.16:205:28
1511.16:215:28
1611.16:215:29
1711.16:225:29
1811.16:225:30
1911.16:235:30
2011.16:235:31
2111.16:245:31
2211.16:245:31
2311.16:255:32
2411.16:255:32
2511.16:265:33
2611.16:265:33
2711.16:265:34
2811.16:275:34
2911.16:275:35
3011.16:285:35
3111.16:285:36

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.36 kWh/m².

For context, solar energy here swings from a low near 4.35 kWh/m² to a high of 6.6 kWh/m² in April across the year — December's 4.36 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.6Bright
314.6Bright
Planning a trip in December

Hazard calendar for Olongapo

In seasonPeak

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

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

Olongapo's monsoon runs June–September, when most of the year's rain falls.

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

Is December a good time to visit Olongapo?

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

6.1
Sightseeing
3rd-best month of the year
7.5
Beach & pool
5th-best month of the year

December is a reasonable time to visit Olongapo for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Olongapo in December

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

In December, Olongapo sees daytime highs around 29°C and nights near 24°C. Pack light clothes. About 7 days see rain.

light clothes

Sea temperature near Olongapo in December

The nearest coast averages about 28°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 18 km away) is warmest in May at about 30°C and coldest in February near 27°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
Jan27Warm
Feb27Warm
Mar28Warm
Apr29Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Olongapo 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 Olongapo peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 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 18UV 14Nov 23UV 8
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov8Very high
Dec9Very high

Air quality in Olongapo 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 Olongapo is worst in November — around 30 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateNov 1530 µg/m³Aug 1421 µg/m³
PM2.5 (µg/m³)Level
Jan27Moderate
Feb26Moderate
Mar29Moderate
Apr28Moderate
May23Moderate
Jun22Moderate
Jul21Moderate
Aug21Moderate
Sep22Moderate
Oct29Moderate
Nov30Moderate
Dec29Moderate
Location & terrain

Where is Olongapo?

Olongapo sits at 14.8°N, 120.3°E, 11 m above sea level, in Philippines. The nearest listed city is Subic, 8.0 km away.

Topography around Olongapo

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

Within 3 km, the terrain around Olongapo has only modest variations in elevation — a maximum elevation change of 232 m around an average of 28 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 931 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,005 m.

The land around Olongapo is covered by water (38%), trees (31%) and artificial surfaces (27%) within 3 km, trees (65%) within 16 km, and water (49%) and trees (27%) within 80 km.

3 km
232 m
16 km
931 m
80 km
2,005 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: Subic 8.0 km · Castillejos 15 km · Morong 17 km · Dinalupihan 19 km · San Marcelino 21 km · Hermosa 24 km · San Antonio 25 km · Orani 28 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 Olongapo (14.8292°, 120.2828°, elevation 11 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. 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).