Bais weather in May

In May, Bais sees average daytime highs of 31°C and overnight lows near 25°C, with 152 mm of rain across 21.9 wet days and about 12.4 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 11% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of May to 12 h 30 min by month's end. Set against the rest of the year, May is Bais's 7th-clearest and 11th-windiest month. For the whole year in context, see Bais's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
25°
12th coldest
Rainfall
152 mm
21.9 wet days
Daylight
12 h 24 min
5:31 AM – 5:57 PM
Cloud cover
76%
7th clearest
Wind
6 km/h
11th windiest
Solar energy
5.53 kWh/m²
Travel score
3.2
out of 10

Bais is city of the Philippines in the province of Negros Oriental.

Density
275/km²
people per km²
Founded
1968

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 31°C through the month.

A typical May day in Bais reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°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)
13225
23225
33225
43225
53225
63225
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293125
303125
313125

How May really feels in Bais

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.

Bais 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
Jan29° / 24°721211.55.1
Feb29° / 23°729.211.75.2
Mar30° / 24°659.411.94.8
Apr32° / 25°589.212.24.2
May31° / 25°15221.912.43.2
Jun30° / 25°24326.712.52.9
Jul29° / 24°2872812.53.1
Aug29° / 24°25926.112.33.3
Sep29° / 24°2682712.13.1
Oct29° / 24°24326.811.83.2
Nov30° / 24°13519.411.63.9
Dec29° / 24°12617.211.54.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 75%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24060
33961
43763
53565
63466
73367
83169
93070
102971
112872
122773
132575
142575
152476
162377
172278
182278
192278
202278
212080
222080
232080
242080
251981
261981
271882
281882
291882
301783
311783

Chance of precipitation in May

Any precipitation

Bais gets around 152 mm of rain over 21.9 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 69% and peaks near 83% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
144
246
348
450
552
654
756
858
960
1062
1164
1266
1368
1470
1572
1674
1775
1876
1977
2078
2179
2280
2381
2481
2582
2682
2782
2883
2983
3083
3183

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 52% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
126929
216930
316831
416732
516633
616435
706436
806337
906238
1006040
1105941
1205743
1305545
1405446
1505248
1605149
1704951
1804852
1904654
2004555
2104357
2204258
2304159
2404060
2503961
2603961
2703862
2803862
2903862
3003763
3103763

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
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 18 min at the start of May to 12 h 30 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 5:35 AM to 5:29 AM, and sunset from 5:55 PM to 6:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:355:55
212.35:345:55
312.35:345:55
412.45:345:55
512.45:335:55
612.45:335:55
712.45:335:55
812.45:325:56
912.45:325:56
1012.45:325:56
1112.45:325:56
1212.45:315:56
1312.45:315:56
1412.45:315:57
1512.45:315:57
1612.45:315:57
1712.45:305:57
1812.45:305:57
1912.55:305:57
2012.55:305:58
2112.55:305:58
2212.55:305:58
2312.55:305:58
2412.55:305:59
2512.55:305:59
2612.55:305:59
2712.55:305:59
2812.55:296:00
2912.55:296:00
3012.55:296:00
3112.55:296:00

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.53 kWh/m².

For context, solar energy here swings from a low near 4.41 kWh/m² to a high of 6.29 kWh/m² in April across the year — May's 5.53 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Bright
25.9Bright
35.9Bright
45.9Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.6Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in May

Hazard calendar for Bais

In seasonPeak

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

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

Bais's rainy season runs May–November, 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 Bais?

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

3.2
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 Bais.

What to pack for Bais in May

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

In May, Bais sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Bais in May

The nearest coast averages about 29°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 28 km away) is warmest in June 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°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar28Warm
Apr28Tropical
May29Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Bais 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 Bais peaks around March 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 22UV 15Dec 12UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec10Very high
Location & terrain

Where is Bais?

Bais sits at 9.6°N, 123.1°E, 10 m above sea level, in Philippines. The nearest listed city is Tanjay, 9.0 km away.

Topography around Bais

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

Within 3 km, the terrain around Bais has only modest variations in elevation — a maximum elevation change of 150 m around an average of 10 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 930 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,814 m.

The land around Bais is covered by water (36%) and cropland (34%) within 3 km, trees (46%) and water (39%) within 16 km, and water (50%) and trees (42%) within 80 km.

3 km
150 m
16 km
930 m
80 km
1,814 m
treesgrasslandcroplandartificial surfaceswatermangroves
May weather nearby: Tanjay 9.0 km · Sibulan 31 km · Dumaguete 38 km · Santa Catalina 40 km · Bayawan 43 km · Kabankalan 55 km · Suay 60 km · Guihulñgan 61 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 Bais (9.5911°, 123.1228°, elevation 10 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).