Rosario weather in May

In May, Rosario sees average daytime highs of 33°C and overnight lows near 25°C, with 150 mm of rain across 20.8 wet days and about 12.6 hours of daylight. It is the 1st-warmest and 7th-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 22% 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 42 min by month's end. Set against the rest of the year, May is Rosario's 7th-clearest and 9th-windiest month. For the whole year in context, see Rosario's year-round climate.

Daytime high
33°
1st warmest
Overnight low
25°
12th coldest
Rainfall
150 mm
20.8 wet days
Daylight
12 h 36 min
5:33 AM – 6:10 PM
Cloud cover
68%
7th clearest
Wind
8 km/h
9th windiest
Solar energy
6.24 kWh/m²
Travel score
2.8
out of 10

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 Rosario reaches about 33°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 34°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)
13325
23325
33325
43325
53325
63325
73325
83325
93325
103325
113325
123325
133325
143325
153325
163325
173325
183325
193225
203225
213225
223225
233225
243225
253225
263225
273225
283225
293225
303225
313225

How May really feels in Rosario

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
31 feel dangerously hot (≥ 39°C)
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.

Rosario weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 7th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% 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 62%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26139
35941
45743
55644
65446
75347
85248
94951
104753
114654
124357
134258
144060
153862
163763
173565
183367
193169
203070
212971
222773
232674
242575
252476
262377
272377
282377
292278
302278
312278

Chance of precipitation in May

Any precipitation

Rosario gets around 150 mm of rain over 20.8 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 66% and peaks near 79% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
147
249
350
452
553
655
756
857
958
1059
1160
1261
1362
1463
1565
1666
1767
1869
1970
2071
2172
2274
2375
2476
2577
2678
2778
2879
2979
3079
3179

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 77% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
14555
24357
34159
43961
53763
63565
73367
83268
93070
102971
112773
122674
132575
142476
152278
162179
172080
181981
191882
201684
211585
221486
231387
241288
251189
261090
27991
28991
29892
30892
31892

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
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 42 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 5:38 AM to 5:30 AM, and sunset from 6:07 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:386:07
212.55:376:07
312.55:376:07
412.55:376:07
512.55:366:08
612.55:366:08
712.55:356:08
812.65:356:08
912.65:356:08
1012.65:346:09
1112.65:346:09
1212.65:346:09
1312.65:336:09
1412.65:336:10
1512.65:336:10
1612.65:336:10
1712.65:326:10
1812.65:326:11
1912.75:326:11
2012.75:326:11
2112.75:316:12
2212.75:316:12
2312.75:316:12
2412.75:316:13
2512.75:316:13
2612.75:316:13
2712.75:316:13
2812.75:316:14
2912.75:306:14
3012.75:306:14
3112.75:306:15

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.24 kWh/m².

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 — May's 6.24 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Bright
306.0Bright
316.0Bright
Planning a trip in May

Hazard calendar for Rosario

In seasonPeak

In May, Rosario sits inside its pacific typhoon 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 May a good time to visit Rosario?

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

2.8
Sightseeing
8th-best month of the year
4.8
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Rosario.

What to pack for Rosario in May

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

In May, Rosario sees daytime highs around 33°C and nights near 25°C. Pack light clothes, rain gear and sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Rosario 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 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (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
May 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).