Pontian Besar weather in September

In September, Pontian Besar sees average daytime highs of 30°C and overnight lows near 25°C, with 144 mm of rain across 21.7 wet days and about 12 hours of daylight. It is the 7th-warmest and 11th-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 4% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Pontian Besar's 6th-clearest and 6th-windiest month. For the whole year in context, see Pontian Besar's year-round climate.

Daytime high
30°
7th warmest
Overnight low
25°
7th coldest
Rainfall
144 mm
21.7 wet days
Daylight
12 hours
7:01 AM – 7:01 PM
Cloud cover
80%
6th clearest
Wind
8 km/h
6th windiest
Solar energy
5.18 kWh/m²
Travel score
3.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Pontian Besar reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
213025
223025
233025
243025
253025
263025
273025
283025
293025
303025

How September really feels in Pontian Besar

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Pontian Besar weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°17521.111.93.7
Feb30° / 24°11716123.8
Mar31° / 25°18322.1123.2
Apr31° / 25°22026.6122.7
May31° / 25°19226.912.12.8
Jun30° / 25°1552312.13.2
Jul30° / 25°14722.612.13.5
Aug30° / 25°14622.7123.5
Sep30° / 25°14421.7123.4
Oct30° / 25°20525.2123.1
Nov30° / 25°28727.611.92.8
Dec29° / 24°27025.611.93.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12080
22080
32179
42179
52179
62179
72179
82179
91981
101981
111882
121882
131783
141783
151684
161585
171585
181585
191585
201585
211486
221486
231486
241486
251486
261486
271486
281486
291486
301387

Chance of precipitation in September

Any precipitation

Pontian Besar gets around 144 mm of rain over 21.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 73% and peaks near 76% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
175
275
374
473
573
672
772
871
971
1070
1170
1270
1370
1470
1571
1671
1771
1872
1972
2073
2173
2274
2374
2474
2574
2674
2775
2875
2975
3076

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
13466
23466
33466
43565
53565
63565
73565
83664
93664
103664
113664
123565
133565
143466
153466
163367
173268
183169
193070
203070
212971
222971
232872
242872
252872
262773
272773
282773
292872
302872

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

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

Days grow by about 0 minutes over September. Sunrise moves from 7:05 AM to 6:56 AM, and sunset from 7:07 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.07:057:07
212.07:057:07
312.07:057:06
412.07:047:06
512.07:047:06
612.07:047:05
712.07:037:05
812.07:037:04
912.07:037:04
1012.07:037:04
1112.07:027:03
1212.07:027:03
1312.07:027:02
1412.07:017:02
1512.07:017:01
1612.07:017:01
1712.07:007:01
1812.07:007:00
1912.07:007:00
2012.06:596:59
2112.06:596:59
2212.06:596:59
2312.06:586:58
2412.06:586:58
2512.06:586:57
2612.06:576:57
2712.06:576:57
2812.06:576:56
2912.06:566:56
3012.06:566:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.18 kWh/m².

For context, solar energy here swings from a low near 4.18 kWh/m² to a high of 5.46 kWh/m² in March across the year — September's 5.18 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Is September a good time to visit Pontian Besar?

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

3.4
Sightseeing
5th-best month of the year
4.7
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Pontian Besar.

What to pack for Pontian Besar in September

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

In September, Pontian Besar sees daytime highs around 30°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 Pontian Besar in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in May at about 30°C and coldest in January 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
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Pontian Besar in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Pontian Besar peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 18UV 15Jun 23UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug13Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Pontian Besar in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Pontian Besar is worst in September — around 46 µg/m³ PM2.5 (poor), about 2.2× the cleanest month (February, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateSep 1945 µg/m³Feb 821 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb21Moderate
Mar26Moderate
Apr32Moderate
May35Moderate
Jun33Moderate
Jul37Poor
Aug40Poor
Sep46Poor
Oct43Poor
Nov29Moderate
Dec22Moderate
Location & terrain

Where is Pontian Besar?

Pontian Besar sits at 1.5°N, 103.4°E, 9 m above sea level, in Malaysia. The nearest listed city is Pekan Nenas, 15 km away.

Topography around Pontian Besar

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

Within 3 km, the terrain around Pontian Besar has only modest variations in elevation — a maximum elevation change of 17 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 194 m; within 80 km, large variations in elevation — a maximum elevation change of 1,020 m.

The land around Pontian Besar is covered by water (43%) and trees (37%) within 3 km, trees (51%) and water (42%) within 16 km, and water (46%) and trees (45%) within 80 km.

3 km
17 m
16 km
194 m
80 km
1,020 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Pekan Nenas 15 km · Kampung Jelutong Tengah 21 km · Gelang Patah 24 km · Taman Universiti 26 km · Kawasan Penempatan Ulu Benut Lima 27 km · Kampung Sedenak 28 km · Kawasan Penempatan Ulu Benut Tiga 29 km · Iskandar Puteri 30 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 Pontian Besar (1.5059°, 103.3816°, elevation 9 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).