Calumbo weather in September

In September, Calumbo sees average daytime highs of 30°C and overnight lows near 20°C, with 6 mm of rain across 1.4 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 9th-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 17% of the time in September, and the air most often feels humid.

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 Calumbo's 5th-clearest and 2nd-windiest month. For the whole year in context, see Calumbo's year-round climate.

Daytime high
30°
9th warmest
Overnight low
20°
4th coldest
Rainfall
6 mm
1.4 wet days
Daylight
12 hours
6:02 AM – 5:59 PM
Cloud cover
62%
5th clearest
Wind
7 km/h
2nd windiest
Solar energy
4.58 kWh/m²
Travel score
5.9
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 Calumbo reaches about 30°C in the afternoon and slips back to 20°C overnight — a 10°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 about 1°C warmer than August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12919
22919
32919
42919
53019
63019
73020
83020
93020
103020
113020
123020
133020
143020
153020
163020
173020
183020
193020
203020
213020
223020
233020
243020
253021
263021
273021
283021
293021
303021

How September really feels in Calumbo

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.

Calumbo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°7110.312.53.7
Feb33° / 23°7210.712.33.4
Mar32° / 24°11615.912.13.2
Apr31° / 24°12916.711.83.5
May31° / 22°12211.65.2
Jun30° / 19°0011.56.7
Jul28° / 18°0011.57.5
Aug29° / 18°20.211.77.0
Sep30° / 20°61.411.95.9
Oct30° / 22°184.212.25.1
Nov31° / 23°6712.112.44.1
Dec31° / 23°6911.612.53.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44753
54753
64753
74753
84753
94753
104654
114753
124753
134753
144753
154555
164555
174555
184555
194456
204357
214357
224258
234159
244060
253961
263961
273763
283763
293565
303565

Chance of precipitation in September

Any precipitation

Calumbo gets around 6 mm of rain over 1.4 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 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
43
53
63
74
84
94
104
115
125
135
145
155
166
176
186
195
205
215
225
236
246
256
266
276
287
297
307

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 47% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)
128018
227919
317920
417722
517623
617425
717227
817029
916831
1016633
1106535
1206238
1306040
1405743
1505545
1605248
1704951
1804753
1904456
2004159
2103961
2203763
2303466
2403268
2503070
2602872
2702674
2802476
2902278
3002179

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 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 6:11 AM to 5:53 AM, and sunset from 6:01 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:116:01
211.86:116:01
311.86:106:01
411.86:106:00
511.96:096:00
611.96:086:00
711.96:086:00
811.96:076:00
911.96:076:00
1011.96:066:00
1111.96:056:00
1211.96:056:00
1311.96:045:59
1411.96:035:59
1511.96:035:59
1612.06:025:59
1712.06:025:59
1812.06:015:59
1912.06:005:59
2012.06:005:59
2112.05:595:59
2212.05:585:58
2312.05:585:58
2412.05:575:58
2512.05:575:58
2612.05:565:58
2712.05:555:58
2812.15:555:58
2912.15:545:58
3012.15:535:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 4.23 kWh/m² to a high of 5.56 kWh/m² in February across the year — September's 4.58 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Calumbo

In seasonPeak

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

Calumbo'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 Calumbo?

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

5.9
Sightseeing
4th-best month of the year
8.0
Beach & pool
4th-best month of the year

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

What to pack for Calumbo in September

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

In September, Calumbo sees daytime highs around 30°C and nights near 20°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Calumbo in September

The nearest coast averages about 21°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 41 km away) is warmest in March at about 28°C and coldest in August near 20°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
Jan26Warm
Feb27Warm
Mar28Warm
Apr27Warm
May25Warm
Jun23Refreshing
Jul21Refreshing
Aug20Refreshing
Sep21Refreshing
Oct24Refreshing
Nov26Warm
Dec26Warm

UV index in Calumbo 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 Calumbo peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 11 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 12UV 15Aug 11UV 6
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May9Very high
Jun7Very high
Jul6High
Aug6High
Sep10Very high
Oct11Extreme
Nov12Extreme
Dec12Extreme

Air quality in Calumbo 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 Calumbo is worst in July — around 47 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (January, 23 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateJul 1847 µg/m³Jan 1923 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb24Moderate
Mar29Moderate
Apr34Moderate
May35Moderate
Jun41Poor
Jul47Poor
Aug43Poor
Sep32Moderate
Oct27Moderate
Nov25Moderate
Dec26Moderate
Location & terrain

Where is Calumbo?

Calumbo sits at 9.1°S, 13.4°E, 15 m above sea level, in Angola. The nearest listed city is Zango, 15 km away.

Topography around Calumbo

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

Within 3 km, the terrain around Calumbo has only modest variations in elevation — a maximum elevation change of 106 m around an average of 20 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 182 m; within 80 km, significant variations in elevation — a maximum elevation change of 257 m.

The land around Calumbo is covered by wetland (42%) and grassland (41%) within 3 km, grassland (54%) and wetland (20%) within 16 km, and water (32%), grassland (31%) and trees (28%) within 80 km.

3 km
106 m
16 km
182 m
80 km
257 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Zango 15 km · Vila Flor 22 km · Viana 27 km · Camama 29 km · Mulenvos 33 km · Nova Vida 34 km · Golfe 36 km · Benfica 36 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 Calumbo (-9.1469°, 13.4194°, elevation 15 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).