Serian weather in May

In May, Serian sees average daytime highs of 32°C and overnight lows near 24°C, with 196 mm of rain across 25.2 wet days and about 12.1 hours of daylight. It is the 2nd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 5% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 hours at the start of May to 12 h 06 min by month's end. Set against the rest of the year, May is Serian's 3rd-clearest and 11th-windiest month. For the whole year in context, see Serian's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
24°
12th coldest
Rainfall
196 mm
25.2 wet days
Daylight
12 h 06 min
6:32 AM – 6:36 PM
Cloud cover
80%
3rd clearest
Wind
4 km/h
11th windiest
Solar energy
4.91 kWh/m²
Travel score
2.5
out of 10

Serian is town in Sarawak, Malaysia.

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 32°C through the month.

A typical May day in Serian reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, May runs on par with April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13224
23224
33224
43224
53224
63224
73224
83224
93224
103224
113224
123224
133224
143224
153224
163224
173224
183224
193224
203224
213224
223224
233224
243224
253224
263224
273224
283224
293224
303224
313224

How May really feels in Serian

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.

Serian weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°26827.711.92.8
Feb30° / 23°23123.2122.9
Mar31° / 23°22426.6122.6
Apr32° / 24°21826.9122.4
May32° / 24°19625.212.12.5
Jun32° / 24°1472012.13.0
Jul32° / 23°13018.212.13.2
Aug32° / 23°15019.7122.9
Sep32° / 23°19323.4122.7
Oct31° / 23°25327.8122.5
Nov31° / 23°26128.711.92.4
Dec31° / 23°29228.111.92.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 81%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11387
21387
31486
41486
51486
61486
71585
81585
91684
101783
111882
121882
131981
142080
152080
162179
172179
182278
192278
202278
212377
222377
232278
242278
252377
262377
272278
282278
292179
302080
312080

Chance of precipitation in May

Any precipitation

Serian gets around 196 mm of rain over 25.2 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 81% and peaks near 89% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
189
288
388
487
587
686
785
884
983
1083
1182
1281
1380
1480
1579
1679
1778
1878
1978
2078
2178
2278
2378
2479
2579
2679
2779
2879
2979
3079
3178

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 80% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
11585
21585
31585
41684
51684
61783
71882
81981
91981
102080
112080
122080
132080
142080
152080
162080
172080
182179
192179
202179
212179
222179
232179
242278
252278
262278
272377
282377
292377
302476
312476

Wind in May

Winds average 4 km/h in May.

Across May, daily wind ranges from about 4 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
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 hours at the start of May to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 6:34 AM to 6:33 AM, and sunset from 6:36 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:346:36
212.06:346:36
312.06:336:36
412.06:336:36
512.06:336:36
612.06:336:36
712.06:336:36
812.06:336:36
912.06:336:36
1012.06:336:36
1112.06:336:36
1212.06:336:36
1312.16:326:36
1412.16:326:36
1512.16:326:36
1612.16:326:36
1712.16:326:36
1812.16:326:36
1912.16:326:36
2012.16:326:36
2112.16:326:36
2212.16:326:36
2312.16:336:36
2412.16:336:36
2512.16:336:36
2612.16:336:36
2712.16:336:36
2812.16:336:37
2912.16:336:37
3012.16:336:37
3112.16:336:37

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.91 kWh/m².

For context, solar energy here swings from a low near 4.23 kWh/m² to a high of 5.24 kWh/m² in August across the year — May's 4.91 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in May

Is May a good time to visit Serian?

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

2.5
Sightseeing
9th-best month of the year
4.1
Beach & pool
6th-best month of the year

May is a weaker month for outdoor sightseeing in Serian.

What to pack for Serian in May

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

In May, Serian sees daytime highs around 32°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Serian 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 51 km away) is warmest in June at about 30°C and coldest in February near 28°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
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov30Tropical
Dec29Tropical

UV index in Serian 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 Serian peaks around February 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 18UV 16Jul 13UV 11
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar15Extreme
Apr15Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct14Extreme
Nov12Extreme
Dec11Extreme

Air quality in Serian 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 Serian is worst in August — around 36 µg/m³ PM2.5 (poor), about 3.2× the cleanest month (January, 11 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateAug 2336 µg/m³Jan 1611 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Moderate
Mar14Moderate
Apr15Moderate
May15Moderate
Jun15Moderate
Jul23Moderate
Aug36Poor
Sep36Poor
Oct21Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Serian?

Serian sits at 1.2°N, 110.6°E, 20 m above sea level, in Malaysia. The nearest listed city is Tebedu, 27 km away.

Topography around Serian

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

Within 3 km, the terrain around Serian has significant variations in elevation — a maximum elevation change of 327 m around an average of 33 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 775 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,649 m.

The land around Serian is covered by trees (82%) within 3 km, trees (95%) within 16 km, and trees (83%) within 80 km.

3 km
327 m
16 km
775 m
80 km
1,649 m
treesgrasslandartificial surfacesbare terrainwatermangroves
May weather nearby: Tebedu 27 km · Siburan 29 km · Simunjan 32 km · Kuching 50 km · Bau 54 km · Lundu 97 km · Sri Aman 99 km · Saratok 106 km

Malaysia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / G / M
230 V · 50 Hz
Prices
≈ 32% of US
price level, 2025
GDP per capita
$13,125
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
22.5
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 581
Religion
Muslim 64%Buddhist 19%Christian 9%Hindu 6%

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 Serian (1.1667°, 110.5667°, elevation 20 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. 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).