Isulan weather in May

In May, Isulan sees average daytime highs of 33°C and overnight lows near 24°C, with 225 mm of rain across 27.1 wet days and about 12.3 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 9% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of May to 12 h 24 min by month's end. Set against the rest of the year, May is Isulan's 7th-clearest and 6th-windiest month. For the whole year in context, see Isulan's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
24°
12th coldest
Rainfall
225 mm
27.1 wet days
Daylight
12 h 18 min
5:29 AM – 5:47 PM
Cloud cover
79%
7th clearest
Wind
3 km/h
6th windiest
Solar energy
5.1 kWh/m²
Travel score
2.2
out of 10

Isulan is municipality of the Philippines and capital of the province of Sultan Kudarat.

Density
187/km²
people per km²
Founded
1957

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 33°C through the month.

A typical May day in Isulan reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, May runs on par with April and about 1°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183224
193224
203224
213224
223224
233224
243224
253224
263224
273224
283224
293224
303224
313224

How May really feels in Isulan

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.

Isulan weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°1291711.73.8
Feb31° / 23°9914.111.83.7
Mar33° / 23°11215.8123.2
Apr33° / 24°12318.212.12.6
May33° / 24°22527.112.32.2
Jun31° / 24°2582712.42.4
Jul31° / 23°25626.612.32.7
Aug31° / 23°21425.112.22.8
Sep31° / 23°21125122.7
Oct31° / 23°23826.411.92.6
Nov31° / 23°17123.211.72.9
Dec31° / 23°1302011.63.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
22872
32872
42872
52575
62476
72476
82179
92179
102080
112080
121981
131981
141882
151882
161882
171882
181882
191882
201882
211981
221981
232080
241981
251981
261981
272080
281981
291981
301981
311882

Chance of precipitation in May

Any precipitation

Isulan gets around 225 mm of rain over 27.1 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 86% and peaks near 91% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
174
276
377
479
580
682
783
885
986
1087
1188
1289
1390
1490
1591
1691
1791
1891
1990
2090
2190
2289
2389
2488
2588
2688
2787
2887
2987
3086
3186

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 82% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
16868
25869
35869
448610
548511
638611
738512
828513
928513
1028414
1118415
1218415
1318316
1418217
1508317
1608218
1708218
1808218
1908119
2008119
2108119
2208119
2308119
2408020
2508020
2608119
2708119
2808119
2908119
3008119
3108218

Wind in May

Winds average 3 km/h in May.

Across May, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
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 May

DaylightNight

Daylight runs from about 12 h 12 min at the start of May to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 5:32 AM to 5:28 AM, and sunset from 5:46 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:325:46
212.25:325:46
312.25:315:46
412.25:315:46
512.35:315:46
612.35:315:46
712.35:305:46
812.35:305:46
912.35:305:46
1012.35:305:46
1112.35:305:46
1212.35:295:46
1312.35:295:46
1412.35:295:47
1512.35:295:47
1612.35:295:47
1712.35:295:47
1812.35:295:47
1912.35:285:47
2012.35:285:47
2112.35:285:48
2212.35:285:48
2312.35:285:48
2412.35:285:48
2512.35:285:48
2612.35:285:49
2712.35:285:49
2812.35:285:49
2912.35:285:49
3012.45:285:49
3112.45:285:50

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.1 kWh/m².

For context, solar energy here swings from a low near 4.69 kWh/m² to a high of 5.84 kWh/m² in April across the year — May's 5.1 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.3Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.2Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.0Bright
Planning a trip in May

Hazard calendar for Isulan

In seasonPeak

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

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

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

Is May a good time to visit Isulan?

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

2.2
Sightseeing
12th-best month of the year
3.8
Beach & pool
11th-best month of the year

May is a weaker month for outdoor sightseeing in Isulan.

What to pack for Isulan in May

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

In May, Isulan sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Isulan 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 at the nearest coast (about 60 km away) is warmest in May at about 30°C and coldest in February near 29°C.

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

28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Isulan 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 Isulan peaks around March 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 20UV 15Dec 12UV 10
UV index (midday)Level
Jan12Extreme
Feb13Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec10Very high

Air quality in Isulan 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 Isulan is worst in March — around 23 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1323 µg/m³Jun 2316 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb21Moderate
Mar23Moderate
Apr18Moderate
May17Moderate
Jun16Moderate
Jul16Moderate
Aug16Moderate
Sep19Moderate
Oct19Moderate
Nov18Moderate
Dec19Moderate
Location & terrain

Where is Isulan?

Isulan sits at 6.6°N, 124.6°E, 65 m above sea level, in Philippines. The nearest listed city is Laguilayan, 10 km away.

Topography around Isulan

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

Within 3 km, the terrain around Isulan has only modest variations in elevation — a maximum elevation change of 25 m around an average of 67 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,834 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,592 m.

The land around Isulan is covered by cropland (42%) and trees (40%) within 3 km, trees (50%) and cropland (42%) within 16 km, and trees (63%) within 80 km.

3 km
25 m
16 km
1,834 m
80 km
2,592 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Laguilayan 10 km · Tacurong 11 km · Norala 13 km · Sultan sa Barongis 19 km · Buluan 24 km · General Salipada K. Pendatun 25 km · Banga 30 km · Koronadal 30 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 Isulan (6.6294°, 124.605°, elevation 65 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).