Miri weather in September

In September, Miri sees average daytime highs of 28°C and overnight lows near 26°C, with 195 mm of rain across 22.7 wet days and about 12 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 5% 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 Miri's 8th-clearest and 7th-windiest month. For the whole year in context, see Miri's year-round climate.

Daytime high
28°
5th warmest
Overnight low
26°
7th coldest
Rainfall
195 mm
22.7 wet days
Daylight
12 hours
6:18 AM – 6:19 PM
Cloud cover
82%
8th clearest
Wind
11 km/h
7th windiest
Solar energy
5.65 kWh/m²
Travel score
3.8
out of 10

Miri is city in Sarawak, Malaysia.

Density
301/km²
people per km²
Founded
1910

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Miri reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826

How September really feels in Miri

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.

Miri weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°20022.611.84.3
Feb27° / 25°1111711.94.9
Mar28° / 26°8316.6125.2
Apr28° / 26°12420.612.14.2
May29° / 26°15921.512.23.9
Jun29° / 26°20119.412.24.1
Jul29° / 26°18719.312.24.3
Aug29° / 26°18320.412.14.1
Sep28° / 26°19522.7123.8
Oct28° / 26°28027.111.93.6
Nov28° / 26°27628.111.83.4
Dec28° / 25°2932811.73.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11882
21882
31882
41783
51882
61882
71684
81684
91585
101486
111486
121387
131387
141387
151288
161288
171288
181288
191288
201288
211288
221288
231288
241288
251288
261288
271288
281288
291288
301288

Chance of precipitation in September

Any precipitation

Miri gets around 195 mm of rain over 22.7 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 76% and peaks near 82% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
174
274
375
475
575
675
775
875
975
1075
1175
1274
1374
1474
1573
1673
1773
1874
1974
2074
2175
2275
2376
2477
2578
2679
2780
2880
2981
3082

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
15644
25743
35842
45941
55941
65941
75941
85941
95941
105941
115842
125842
135743
145743
155644
165545
175545
185446
195347
205347
215347
225347
235446
245446
255545
265644
275743
285842
295941
306040

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:21 AM to 6:14 AM, and sunset from 6:26 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:216:26
212.16:216:26
312.16:216:25
412.16:216:25
512.16:206:24
612.16:206:24
712.16:206:23
812.16:206:23
912.16:196:23
1012.06:196:22
1112.06:196:22
1212.06:196:21
1312.06:186:21
1412.06:186:20
1512.06:186:20
1612.06:186:19
1712.06:176:19
1812.06:176:18
1912.06:176:18
2012.06:176:17
2112.06:166:17
2212.06:166:16
2312.06:166:16
2412.06:166:15
2512.06:156:15
2612.06:156:14
2712.06:156:14
2812.06:156:13
2912.06:156:13
3012.06:146:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.65 kWh/m².

For context, solar energy here swings from a low near 4.68 kWh/m² to a high of 5.96 kWh/m² in April across the year — September's 5.65 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Miri

In seasonPeak

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

Miri 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 Miri?

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

3.8
Sightseeing
9th-best month of the year
4.6
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Miri.

What to pack for Miri in September

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

In September, Miri sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Miri 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 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°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb27Warm
Mar28Tropical
Apr29Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Miri 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 Miri peaks around February 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 22 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 17UV 14Nov 22UV 11
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Miri 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 Miri is worst in May — around 68 µg/m³ PM2.5 (unhealthy), about 5.1× the cleanest month (October, 13 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1764 µg/m³Oct 1815 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb48Poor
Mar47Poor
Apr34Moderate
May68Unhealthy
Jun35Moderate
Jul23Moderate
Aug23Moderate
Sep28Moderate
Oct13Moderate
Nov24Moderate
Dec24Moderate
Location & terrain

Where is Miri?

Miri sits at 4.4°N, 114.0°E, 8 m above sea level, in Malaysia. The nearest listed city is Kuala Belait, 34 km away.

Topography around Miri

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

Within 3 km, the terrain around Miri has only modest variations in elevation — a maximum elevation change of 87 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 112 m; within 80 km, significant variations in elevation — a maximum elevation change of 531 m.

The land around Miri is covered by trees (33%), water (31%) and artificial surfaces (25%) within 3 km, water (44%) and trees (40%) within 16 km, and trees (57%) and water (40%) within 80 km.

3 km
87 m
16 km
112 m
80 km
531 m
treesgrasslandartificial surfacesbare terrainwater
September weather nearby: Kuala Belait 34 km · Marudi 43 km · Seria 44 km · Beluru 48 km · Liang 64 km · Niah 67 km · Tutong 86 km · Sengkurong 108 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 Miri (4.3993°, 113.9916°, elevation 8 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).