Balombo weather in September

In September, Balombo sees average daytime highs of 30°C and overnight lows near 14°C, with 45 mm of rain across 8.7 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 8th-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 51% of the time in September, and the air most often feels dry.

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 Balombo's 5th-clearest and 6th-windiest month. For the whole year in context, see Balombo's year-round climate.

Daytime high
30°
1st warmest
Overnight low
14°
5th coldest
Rainfall
45 mm
8.7 wet days
Daylight
11 h 54 min
5:57 AM – 5:53 PM
Cloud cover
41%
5th clearest
Wind
5 km/h
6th windiest
Solar energy
6.07 kWh/m²
Travel score
5.6
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 Balombo reaches about 30°C in the afternoon and slips back to 14°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, September runs on par with August and about 3°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13013
23014
33014
43014
53014
63014
73014
83014
93014
103014
113014
123014
133014
143014
153014
163014
173014
182914
192915
202915
212915
222915
232915
242915
252915
262915
272915
282915
292915
302815

Balombo weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 15°17119.712.65.1
Feb25° / 16°16717.412.45.1
Mar25° / 16°23923.912.14.4
Apr26° / 16°11516.411.75.6
May27° / 14°61.311.48.3
Jun27° / 12°0011.38.9
Jul28° / 12°0011.38.4
Aug30° / 13°30.711.66.9
Sep30° / 14°458.711.95.6
Oct27° / 16°20525.912.34.2
Nov25° / 16°26826.812.64.0
Dec24° / 16°22423.212.74.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 29% of September, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18911
28911
38911
48911
58911
68713
78713
88713
98614
108614
118515
128515
138416
148317
158317
168218
178119
188020
197921
207723
217723
227624
237525
247426
257426
267228
277228
287030
297030
306832

Chance of precipitation in September

Any precipitation

Balombo gets around 45 mm of rain over 8.7 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 30% and peaks near 59% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
18
29
310
410
511
612
713
814
915
1016
1118
1220
1322
1424
1526
1628
1730
1833
1935
2038
2140
2243
2345
2447
2549
2651
2753
2855
2957
3059

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
183161
282171
381181
480191
579201
678211
777221
874242
972262
1070282
1167303
1265323
1362344
1458375
1555396
1651418
1748439
18444511
19414712
20374914
21345016
22315118
23285220
24255223
25225325
26205327
27185230
28175132
29155035
30144838

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 6:08 AM to 5:47 AM, and sunset from 5:53 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:085:53
211.86:075:53
311.86:065:53
411.86:065:53
511.86:055:53
611.86:045:53
711.86:045:53
811.86:035:53
911.96:025:53
1011.96:025:53
1111.96:015:53
1211.96:005:53
1311.95:595:53
1411.95:595:53
1511.95:585:53
1611.95:575:53
1711.95:575:53
1812.05:565:53
1912.05:555:53
2012.05:545:53
2112.05:545:53
2212.05:535:53
2312.05:525:53
2412.05:515:53
2512.05:515:53
2612.15:505:53
2712.15:495:53
2812.15:495:53
2912.15:485:53
3012.15:475:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.07 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 5.29 kWh/m² to a high of 6.07 kWh/m² in September across the year — September's 6.07 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Bright
236.0Bright
246.0Bright
256.0Bright
266.0Bright
276.0Bright
286.0Bright
296.0Bright
306.0Bright
Planning a trip in September

Hazard calendar for Balombo

In seasonPeak

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

Balombo's monsoon runs October–March, when most of the year's rain falls.

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

Is September a good time to visit Balombo?

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

5.6
Sightseeing
5th-best month of the year
7.3
Beach & pool
5th-best month of the year

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

What to pack for Balombo in September

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

In September, Balombo sees daytime highs around 30°C and nights near 14°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Balombo 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 Balombo peaks around January 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 13 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 highExtremeJan 18UV 16Aug 13UV 9
UV index (midday)Level
Jan17Extreme
Feb15Extreme
Mar16Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug8Very high
Sep10Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme

Air quality in Balombo 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 Balombo is worst in August — around 114 µg/m³ PM2.5 (unhealthy), about 12.5× the cleanest month (December, 9 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyModerateGoodAug 10113 µg/m³Dec 239 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar11Good
Apr12Moderate
May31Moderate
Jun72Unhealthy
Jul109Unhealthy
Aug114Unhealthy
Sep51Poor
Oct21Moderate
Nov10Good
Dec9Good
Location & terrain

Where is Balombo?

Balombo sits at 12.4°S, 14.8°E, 1,203 m above sea level, in Angola. The nearest listed city is Chindumbo, 56 km away.

Alto Hama

Topography around Balombo

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

Within 3 km, the terrain around Balombo has only modest variations in elevation — a maximum elevation change of 148 m around an average of 1,197 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,436 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,995 m.

The land around Balombo is covered by cropland (63%) within 3 km, trees (31%), cropland (28%) and shrubs (27%) within 16 km, and shrubs (31%), grassland (28%) and trees (21%) within 80 km.

3 km
148 m
16 km
1,436 m
80 km
1,995 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Chindumbo 56 km · Londuimbali 61 km · Bocoio 70 km · Cubal do Lumbo 70 km · Ucuma 74 km · Ganda 75 km · Longonjo 80 km · Alto Hama 86 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 Balombo (-12.3543°, 14.7723°, elevation 1,203 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. 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).