Iba weather in May

In May, Iba sees average daytime highs of 30°C and overnight lows near 26°C, with 210 mm of rain across 22.2 wet days and about 12.7 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 17% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of May to 12 h 48 min by month's end. Set against the rest of the year, May is Iba's 7th-clearest and 10th-windiest month. For the whole year in context, see Iba's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
26°
12th coldest
Rainfall
210 mm
22.2 wet days
Daylight
12 h 42 min
5:35 AM – 6:18 PM
Cloud cover
72%
7th clearest
Wind
6 km/h
10th windiest
Solar energy
5.7 kWh/m²
Travel score
3.4
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 May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical May day in Iba reaches about 30°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, May runs on par with April and about 1°C warmer than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13126
23126
33126
43126
53126
63126
73126
83126
93126
103126
113126
123126
133026
143026
153026
163026
173026
183026
193026
203026
213026
223026
233026
243026
253026
263026
273026
283026
293026
303026
313026

How May really feels in Iba

Once humidity and wind are folded in, May 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 May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Iba weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 6th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 66%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26139
35941
45743
55545
65347
75050
84753
94654
104456
114258
124060
133862
143763
153565
163367
173169
182971
192773
202575
212377
222179
232080
241981
251783
261684
271585
281486
291486
301486
311387

Chance of precipitation in May

Any precipitation

Iba gets around 210 mm of rain over 22.2 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 71% and peaks near 85% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
147
249
351
453
555
657
759
861
962
1064
1166
1268
1370
1471
1573
1674
1776
1877
1978
2079
2180
2281
2382
2483
2584
2684
2785
2885
2985
3085
3185

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 66% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
115940
215742
315643
415445
515247
615049
704852
804654
904456
1004258
1104060
1203961
1303763
1403565
1503367
1603169
1703070
1802872
1902674
2002575
2102377
2202278
2302179
2402080
2501981
2601981
2701882
2801882
2901882
3001882
3101882

Wind in May

Winds average 6 km/h in May.

Across May, 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
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 30 min at the start of May to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over May. Sunrise moves from 5:41 AM to 5:32 AM, and sunset from 6:14 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:416:14
212.65:416:14
312.65:406:14
412.65:406:14
512.65:396:15
612.65:396:15
712.65:386:15
812.65:386:15
912.65:376:16
1012.65:376:16
1112.75:376:16
1212.75:366:16
1312.75:366:17
1412.75:366:17
1512.75:356:17
1612.75:356:18
1712.75:356:18
1812.75:346:18
1912.75:346:19
2012.75:346:19
2112.85:346:19
2212.85:346:20
2312.85:336:20
2412.85:336:20
2512.85:336:21
2612.85:336:21
2712.85:336:21
2812.85:336:22
2912.85:336:22
3012.85:326:22
3112.85:326:23

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.7 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 — May's 5.7 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.2Intense
56.2Intense
66.2Intense
76.1Intense
86.1Intense
96.0Intense
106.0Bright
115.9Bright
125.9Bright
135.8Bright
145.8Bright
155.7Bright
165.7Bright
175.6Bright
185.6Bright
195.5Bright
205.5Bright
215.5Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Iba

In seasonPeak

In May, 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 May a good time to visit Iba?

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

3.4
Sightseeing
8th-best month of the year
4.9
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Iba.

What to pack for Iba in May

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

In May, Iba sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Iba in May

The nearest coast averages about 30°C in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).