Iba weather in December

In December, Iba sees average daytime highs of 29°C and overnight lows near 24°C, with 57 mm of rain across 7.2 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 37% 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 Iba's 5th-clearest and 8th-windiest month. For the whole year in context, see Iba's year-round climate.

Daytime high
29°
8th warmest
Overnight low
24°
3rd coldest
Rainfall
57 mm
7.2 wet days
Daylight
11 h 06 min
6:23 AM – 5:29 PM
Cloud cover
56%
5th clearest
Wind
7 km/h
8th windiest
Solar energy
4.39 kWh/m²
Travel score
6.0
out of 10

Iba is municipality of the Philippines and capital of the province of Zambales.

Density
176/km²
people per km²
Founded
1611

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 Iba 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 on par with 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
192923
202923
212923
222923
232923
242923
252923
262823
272823
282823
292823
302823
312823

How December really feels in Iba

Once humidity and wind are folded in, December averages 5 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
5
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.

Iba 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°143.211.26.8
Feb29° / 23°193.211.56.5
Mar30° / 24°325.511.95.8
Apr31° / 25°4810.212.34.7
May30° / 26°21022.212.73.4
Jun29° / 25°39127.612.93.0
Jul28° / 25°62029.912.83.1
Aug28° / 25°63329.812.53.3
Sep28° / 25°4312812.13.2
Oct29° / 25°25221.811.73.9
Nov29° / 24°9511.411.35.2
Dec29° / 24°577.211.16.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% 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 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35743
45842
55743
65743
75842
85842
95743
105743
115743
125644
135743
145644
155644
165644
175644
185545
195545
205446
215446
225446
235545
245545
255545
265644
275743
285842
295941
305941
316040

Chance of precipitation in December

Any precipitation

Iba gets around 57 mm of rain over 7.2 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 23% and peaks near 27% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
126
226
326
427
527
627
726
826
926
1026
1126
1226
1326
1425
1525
1624
1724
1823
1922
2022
2121
2221
2320
2420
2519
2618
2717
2817
2916
3015
3115

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 67% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1017794
2018793
3019783
4020773
5020773
6021763
7021763
8022753
9022753
10023743
11023743
12024733
13124723
14125713
15125722
16126712
17227692
18228682
19329662
20330652
21331651
22433621
23434611
24535591
25536581
26538561
27639541
28640531
29642511
30643501
31644491

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 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
16calm
26calm
36calm
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 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 6:15 AM to 6:30 AM, and sunset from 5:25 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:155:25
211.16:165:25
311.16:165:25
411.16:175:25
511.16:175:25
611.16:185:26
711.16:195:26
811.16:195:26
911.16:205:27
1011.16:205:27
1111.16:215:27
1211.16:215:28
1311.16:225:28
1411.16:225:28
1511.16:235:29
1611.16:235:29
1711.16:245:30
1811.16:245:30
1911.16:255:30
2011.16:255:31
2111.16:265:31
2211.16:265:32
2311.16:275:32
2411.16:275:33
2511.16:285:33
2611.16:285:34
2711.16:295:34
2811.16:295:35
2911.16:295:35
3011.16:305:36
3111.16:305:36

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.39 kWh/m².

For context, solar energy here swings from a low near 4.15 kWh/m² to a high of 6.48 kWh/m² in April across the year — December's 4.39 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in December

Hazard calendar for Iba

In seasonPeak

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

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

Iba'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 Iba?

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

6.0
Sightseeing
3rd-best month of the year
7.5
Beach & pool
4th-best month of the year

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

What to pack for Iba in December

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

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

light clothes

Sea temperature near Iba 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 offshore 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
Jul30Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Iba in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iba peaks around August 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 17UV 14Dec 14UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Iba 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 Iba 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 Iba?

Iba sits at 15.3°N, 120.0°E, 13 m above sea level, in Philippines. The nearest listed city is Botolan, 7.0 km away.

Topography around Iba

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

Within 3 km, the terrain around Iba has only modest variations in elevation — a maximum elevation change of 43 m around an average of 5 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,276 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,021 m.

The land around Iba is covered by water (40%) and trees (28%) within 3 km, water (47%) and trees (29%) within 16 km, and water (38%) and trees (36%) within 80 km.

3 km
43 m
16 km
1,276 m
80 km
2,021 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: Botolan 7.0 km · Masinloc 23 km · San Narciso 37 km · San Marcelino 44 km · San Antonio 44 km · Santa Cruz 49 km · Castillejos 50 km · Subic 57 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 Iba (15.3276°, 119.978°, 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. 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).