Tombôco weather in September

In September, Tombôco sees average daytime highs of 27°C and overnight lows near 20°C, with 11 mm of rain across 3.3 wet days and about 12 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 2% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Tombôco's 5th-clearest and 1st-windiest month. For the whole year in context, see Tombôco's year-round climate.

Daytime high
27°
10th warmest
Overnight low
20°
4th coldest
Rainfall
11 mm
3.3 wet days
Daylight
12 hours
6:02 AM – 6:00 PM
Cloud cover
81%
5th clearest
Wind
8 km/h
1st windiest
Solar energy
3.54 kWh/m²
Travel score
6.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Tombôco reaches about 27°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 29°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12719
22719
32719
42719
52719
62719
72719
82719
92719
102719
112719
122719
132720
142720
152720
162720
172720
182720
192720
202820
212820
222820
232820
242820
252820
262820
272820
282820
292820
302820

How September really feels in Tombôco

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.

Tombôco weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 22°16421.112.43.7
Feb30° / 23°15018.712.23.7
Mar30° / 23°15320.4123.5
Apr30° / 23°23424.511.93.2
May29° / 22°6711.111.75.3
Jun27° / 19°20.311.67.8
Jul27° / 18°10.111.68.0
Aug27° / 18°4111.87.5
Sep27° / 20°113.3126.8
Oct28° / 21°6113.912.25.0
Nov29° / 22°16222.612.33.6
Dec29° / 22°17622.312.43.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% 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 93%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1991
2793
3793
4793
5793
6793
7793
8793
9793
10793
11793
12793
13793
14793
15793
16793
17793
18793
19793
20793
21793
22793
23793
24793
25694
26595
27595
28595
29595
30496

Chance of precipitation in September

Any precipitation

Tombôco gets around 11 mm of rain over 3.3 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 12% and peaks near 18% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
17
27
38
48
59
69
79
810
910
1011
1111
1211
1312
1412
1512
1612
1712
1812
1912
2012
2112
2213
2313
2413
2513
2614
2715
2816
2917
3018

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 74% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
155450
253470
351490
449510
546540
644560
742580
840600
937630
1035650
1133670
1231690
1329710
1427730
1525750
1623770
1721790
1819810
1918820
2016840
2115850
2214860
2312880
2411890
2510900
269901
277921
286931
296922
305932

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

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.

0246810151015202530
Wind speed (km/h)Feels
17calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
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 11 h 54 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 12 minutes over September. Sunrise moves from 6:10 AM to 5:54 AM, and sunset from 6:02 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:106:02
211.96:106:02
311.96:096:02
411.96:096:02
511.96:086:02
611.96:086:02
711.96:076:01
811.96:076:01
911.96:066:01
1011.96:056:01
1111.96:056:01
1211.96:046:01
1311.96:046:00
1412.06:036:00
1512.06:036:00
1612.06:026:00
1712.06:026:00
1812.06:016:00
1912.06:005:59
2012.06:005:59
2112.05:595:59
2212.05:595:59
2312.05:585:59
2412.05:585:58
2512.05:575:58
2612.05:575:58
2712.05:565:58
2812.05:555:58
2912.05:555:58
3012.15:545:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.54 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.54 kWh/m² to a high of 5.06 kWh/m² in March across the year — September's 3.54 kWh/m² sits near the bottom.

01234151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Tombôco

In seasonPeak

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

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

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

Is September a good time to visit Tombôco?

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

6.8
Sightseeing
4th-best month of the year
7.1
Beach & pool
4th-best month of the year

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

What to pack for Tombôco in September

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

In September, Tombôco sees daytime highs around 27°C and nights near 20°C. Pack light clothes. About 3 days see rain.

light clothes

Sea temperature near Tombôco in September

The nearest coast averages about 22°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 62 km away) is warmest in March at about 28°C and coldest in August near 21°C.

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

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar28Tropical
Apr27Warm
May25Warm
Jun23Refreshing
Jul21Refreshing
Aug21Refreshing
Sep22Refreshing
Oct25Warm
Nov26Warm
Dec26Warm

UV index in Tombôco in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tombôco peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeMar 15UV 15Jul 24UV 6
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May9Very high
Jun7Very high
Jul6High
Aug6High
Sep10Very high
Oct13Extreme
Nov12Extreme
Dec11Extreme

Air quality in Tombôco 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 Tombôco is worst in July — around 40 µg/m³ PM2.5 (poor), about 4.0× the cleanest month (November, 10 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodJul 2340 µg/m³Nov 1910 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar13Moderate
Apr12Moderate
May21Moderate
Jun33Moderate
Jul40Poor
Aug39Poor
Sep27Moderate
Oct14Moderate
Nov10Good
Dec12Good
Location & terrain

Where is Tombôco?

Tombôco sits at 6.8°S, 13.3°E, 396 m above sea level, in Angola. The nearest listed city is N'zeto, 69 km away.

MatadiBomaMbanza KongoKengeSoyoMoandaCuímba

Topography around Tombôco

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

Within 3 km, the terrain around Tombôco has only modest variations in elevation — a maximum elevation change of 170 m around an average of 381 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 383 m; within 80 km, large variations in elevation — a maximum elevation change of 801 m.

The land around Tombôco is covered by trees (78%) within 3 km, trees (85%) within 16 km, and grassland (49%) and trees (45%) within 80 km.

3 km
170 m
16 km
383 m
80 km
801 m
treesshrubsgrasslandartificial surfaceswater
September weather nearby: N'zeto 69 km · Matadi 108 km · Boma 110 km · Mbanza Kongo 117 km · Kenge 121 km · Soyo 130 km · Moanda 144 km · Cuímba 162 km

Angola travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
220 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$3,129
2025
Happiness
3.8 / 10
World Happiness, 2017
Homicide rate
4.1
per 100k, 2016
Road deaths
26.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 413
Religion
Roman Catholic 41%Protestant 38%none 12%other 9%

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 Tombôco (-6.8052°, 13.3302°, elevation 396 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).