Sitiawan weather in September

In September, Sitiawan sees average daytime highs of 30°C and overnight lows near 25°C, with 209 mm of rain across 24.1 wet days and about 12 hours of daylight. It is the 7th-warmest and 7th-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 1% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Sitiawan's 10th-clearest and 4th-windiest month. For the whole year in context, see Sitiawan's year-round climate.

Daytime high
30°
7th warmest
Overnight low
25°
6th coldest
Rainfall
209 mm
24.1 wet days
Daylight
12 hours
7:11 AM – 7:12 PM
Cloud cover
88%
10th clearest
Wind
7 km/h
4th windiest
Solar energy
5.27 kWh/m²
Travel score
3.1
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 Sitiawan 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 28°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 Sitiawan

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.

Sitiawan weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 25°21025.711.83.3
Feb30° / 25°15422.111.93.3
Mar30° / 25°21327.2122.9
Apr30° / 26°23528.412.12.6
May31° / 26°2042612.22.8
Jun31° / 26°13419.912.23.4
Jul30° / 25°13620.812.23.5
Aug30° / 25°16322.412.13.3
Sep30° / 25°20924.1123.1
Oct30° / 25°28227.611.92.9
Nov29° / 25°35628.811.82.8
Dec29° / 25°29827.811.83.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 5% of September, with mostly cloudy or overcast conditions the remaining 94%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1793
2793
3793
4892
5892
6892
7991
8991
9991
10991
11892
12892
13892
14892
15892
16793
17694
18694
19595
20595
21595
22496
23496
24496
25496
26496
27397
28397
29397
30397

Chance of precipitation in September

Any precipitation

Sitiawan gets around 209 mm of rain over 24.1 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 80% and peaks near 84% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
179
279
379
479
579
679
779
879
979
1080
1180
1280
1379
1479
1579
1679
1779
1880
1980
2080
2180
2281
2381
2481
2581
2682
2782
2883
2983
3084

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
17030
27030
37129
47129
57129
67228
77228
87228
97228
107228
117228
127228
137228
147129
157030
166931
176931
186832
196733
206733
216634
226634
236535
246535
256535
266535
276535
286535
296634
306634

Wind in September

Winds average 7 km/h in September.

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

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

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

Days shrink by about 6 minutes over September. Sunrise moves from 7:14 AM to 7:07 AM, and sunset from 7:19 PM to 7:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.17:147:19
212.17:147:19
312.17:147:18
412.17:147:18
512.17:147:18
612.17:137:17
712.17:137:17
812.17:137:16
912.17:137:16
1012.07:127:15
1112.07:127:15
1212.07:127:14
1312.07:127:14
1412.07:117:13
1512.07:117:13
1612.07:117:12
1712.07:117:12
1812.07:107:11
1912.07:107:11
2012.07:107:10
2112.07:107:10
2212.07:097:09
2312.07:097:09
2412.07:097:08
2512.07:097:08
2612.07:087:07
2712.07:087:07
2812.07:087:06
2912.07:087:06
3012.07:077:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.27 kWh/m².

For context, solar energy here swings from a low near 4.54 kWh/m² to a high of 5.82 kWh/m² in March across the year — September's 5.27 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.1Bright
305.1Bright
Planning a trip in September

Hazard calendar for Sitiawan

In seasonPeak

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

Sitiawan 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 September a good time to visit Sitiawan?

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

3.1
Sightseeing
6th-best month of the year
4.3
Beach & pool
6th-best month of the year

September is a weaker month for outdoor sightseeing in Sitiawan.

What to pack for Sitiawan in September

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

In September, Sitiawan sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

Sea temperature near Sitiawan in September

The nearest coast averages about 30°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 13 km away) is warmest in May at about 30°C and coldest in January near 29°C.

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

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb30Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov29Tropical
Dec29Tropical

UV index in Sitiawan in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sitiawan peaks around February 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 19UV 14Jul 11UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar13Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug12Extreme
Sep14Extreme
Oct13Extreme
Nov11Extreme
Dec10Extreme

Air quality in Sitiawan 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 Sitiawan is worst in September — around 25 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (November, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1325 µg/m³Nov 2115 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar20Moderate
Apr19Moderate
May20Moderate
Jun21Moderate
Jul24Moderate
Aug23Moderate
Sep25Moderate
Oct22Moderate
Nov14Moderate
Dec16Moderate
Location & terrain

Where is Sitiawan?

Sitiawan sits at 4.2°N, 100.7°E, 9 m above sea level, in Malaysia. The nearest listed city is Seri Manjung, 4.0 km away.

Topography around Sitiawan

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

Within 3 km, the terrain around Sitiawan has only modest variations in elevation — a maximum elevation change of 21 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 375 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,873 m.

The land around Sitiawan is covered by trees (57%) and artificial surfaces (32%) within 3 km, trees (58%) and water (28%) within 16 km, and trees (46%) and water (46%) within 80 km.

3 km
21 m
16 km
375 m
80 km
1,873 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Seri Manjung 4.0 km · Lumut 8.0 km · Pantai Remis 28 km · Parit 38 km · Teluk Intan 42 km · Hutan Melintang 46 km · Batu Gajah 47 km · Kampar 51 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 Sitiawan (4.2168°, 100.6996°, 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. 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).