Dili weather in September

In September, Dili sees average daytime highs of 29°C and overnight lows near 22°C, with 20 mm of rain across 4.9 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Dili's 2nd-clearest and 5th-windiest month. For the whole year in context, see Dili's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
22°
3rd coldest
Rainfall
20 mm
4.9 wet days
Daylight
12 hours
6:33 AM – 6:31 PM
Cloud cover
43%
2nd clearest
Wind
8 km/h
5th windiest
Solar energy
6.61 kWh/m²
Travel score
6.2
out of 10

Dili is capital of East Timor.

Density
840/km²
people per km²
Founded
1520

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 29°C through the month.

A typical September day in Dili reaches about 29°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52921
62921
72922
82922
92922
102922
112922
122922
132922
142922
152922
162922
172922
182922
192922
202922
212922
222922
232922
242922
252922
262922
272922
282922
292922
302922

How September really feels in Dili

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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Dili weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°21625.412.43.9
Feb28° / 24°21024.812.33.7
Mar28° / 23°22726.212.13.8
Apr28° / 23°20422.411.84.0
May29° / 23°7412.211.65.5
Jun29° / 22°254.311.56.6
Jul28° / 22°132.611.67.0
Aug29° / 21°71.511.77.0
Sep29° / 22°204.911.96.2
Oct29° / 23°7414.612.24.9
Nov29° / 24°17824.912.43.6
Dec28° / 24°23527.812.53.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27525
37525
47525
57525
67525
77426
87426
97426
107426
117426
127327
137327
147327
157327
167327
177327
187327
197228
207228
217228
227228
237129
247129
257129
267129
277030
287030
296931
306931

Chance of precipitation in September

Any precipitation

Dili gets around 20 mm of rain over 4.9 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 16% and peaks near 27% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
18
28
39
49
510
610
711
811
912
1012
1113
1213
1314
1415
1515
1616
1717
1817
1918
2019
2119
2220
2321
2422
2522
2623
2724
2825
2926
3027

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 71% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1436537
2336547
3336538
4336538
5336529
6336529
7236539
82365210
92355310
102355211
112345311
122345311
132335312
142325313
152315413
161295614
171285615
181275616
191255717
201235917
211225819
221205920
231195921
240186022
250166024
260156025
270146026
280135928
290125929
300115831

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 6:42 AM to 6:25 AM, and sunset from 6:32 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:426:32
211.86:426:32
311.86:416:32
411.96:416:32
511.96:406:32
611.96:396:32
711.96:396:32
811.96:386:32
911.96:386:32
1011.96:376:31
1111.96:366:31
1211.96:366:31
1311.96:356:31
1411.96:356:31
1511.96:346:31
1612.06:336:31
1712.06:336:31
1812.06:326:30
1912.06:326:30
2012.06:316:30
2112.06:306:30
2212.06:306:30
2312.06:296:30
2412.06:296:30
2512.06:286:30
2612.06:276:29
2712.06:276:29
2812.16:266:29
2912.16:266:29
3012.16:256:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.61 kWh/m².

For context, solar energy here swings from a low near 4.88 kWh/m² to a high of 6.83 kWh/m² in October across the year — September's 6.61 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.6Intense
146.6Intense
156.6Intense
166.6Intense
176.6Intense
186.6Intense
196.6Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.8Intense
286.8Intense
296.8Intense
306.8Intense
Planning a trip in September

Hazard calendar for Dili

In seasonPeak

None of Dili's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Dili sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Dili's rainy season runs November–April, when most of the year's rain falls.

Cyclone
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Dili?

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

6.2
Sightseeing
4th-best month of the year
8.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Dili for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Dili in September

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

In September, Dili sees daytime highs around 29°C and nights near 22°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

Sea temperature near Dili in September

The nearest coast averages about 28°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 21 km away) is warmest in November at about 30°C and coldest in August 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
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Tropical
Jul28Warm
Aug27Warm
Sep28Warm
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Dili 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 Dili peaks around February 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 22UV 15Jul 11UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul9Very high
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov14Extreme
Dec12Extreme
Location & terrain

Where is Dili?

Dili sits at 8.6°S, 125.6°E, 3 m above sea level, in Timor Leste. The nearest listed city is Aileu, 19 km away.

GlenoLiquiçáMaubaraAtsabeMalianaVenilaleSuai

Topography around Dili

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

Within 3 km, the terrain around Dili has significant variations in elevation — a maximum elevation change of 422 m around an average of 52 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,468 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,916 m.

The land around Dili is covered by artificial surfaces (39%), water (28%) and trees (23%) within 3 km, water (44%) and trees (32%) within 16 km, and water (52%) and trees (34%) within 80 km.

3 km
422 m
16 km
1,468 m
80 km
2,916 m
treesgrasslandartificial surfaceswater
September weather nearby: Aileu 19 km · Gleno 24 km · Liquiçá 26 km · Maubara 41 km · Atsabe 45 km · Maliana 62 km · Venilale 89 km · Suai 91 km

Timor Leste travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E / F / I
220 V · 50 Hz
Prices
≈ 28% of US
price level, 2025
GDP per capita
$1,341
2025
Homicide rate
4.1
per 100k, 2015
Road deaths
11.9
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Catholic 91%other 7%Protestant Evangelical 2%

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 Dili (-8.5586°, 125.5736°, elevation 3 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).