Demba weather in September

In September, Demba sees average daytime highs of 30°C and overnight lows near 21°C, with 130 mm of rain across 20.7 wet days and about 12 hours of daylight. It is the 5th-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 12% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Demba's 5th-clearest and 3rd-windiest month. For the whole year in context, see Demba's year-round climate.

Daytime high
30°
5th warmest
Overnight low
21°
9th coldest
Rainfall
130 mm
20.7 wet days
Daylight
12 hours
6:26 AM – 6:24 PM
Cloud cover
71%
5th clearest
Wind
5 km/h
3rd windiest
Solar energy
5.17 kWh/m²
Travel score
3.7
out of 10

Demba is town in DR Congo.

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 30°C through the month.

A typical September day in Demba reaches about 30°C in the afternoon and slips back to 21°C overnight — a 9°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 cooler than August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13021
23021
33021
43021
53021
63021
73021
83021
93021
103021
113021
123021
133021
143021
153021
163021
173021
183021
193021
203021
213021
223021
233021
243021
253021
263021
273021
283021
293021
303021

How September really feels in Demba

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.

Demba weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°13619.212.34.0
Feb30° / 21°13117.512.23.8
Mar30° / 22°17621.3123.6
Apr29° / 22°16021.411.93.7
May30° / 21°6812.711.84.6
Jun31° / 20°132.811.75.2
Jul32° / 20°71.711.74.9
Aug31° / 21°5710.511.84.5
Sep30° / 21°13020.7123.7
Oct29° / 21°17224.112.13.5
Nov29° / 21°18324.612.23.5
Dec29° / 21°16222.712.33.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
23961
33961
43862
53763
63565
73466
83367
93367
103367
113268
123169
133169
143070
153070
162971
172971
182971
192971
202872
212971
222971
232971
242872
252773
262773
272773
282674
292674
302575

Chance of precipitation in September

Any precipitation

Demba gets around 130 mm of rain over 20.7 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 68% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
153
255
356
457
559
660
762
863
964
1065
1166
1267
1368
1469
1569
1670
1770
1871
1971
2072
2173
2273
2374
2475
2576
2676
2776
2877
2977
3077

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 75% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1134650
2034453
3034354
4024157
5023959
6023860
7023662
8023464
9013267
10013069
11012871
12012772
13012574
14012376
15002179
16002080
17001882
18001783
19001684
20001585
21001486
22001387
23001288
24001288
25001189
26001189
27001189
28001189
29001189
30001189

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 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
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 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:34 AM to 6:19 AM, and sunset from 6:27 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:346:27
211.96:336:27
311.96:336:27
411.96:326:27
511.96:326:27
611.96:316:26
711.96:316:26
811.96:306:26
911.96:306:26
1011.96:296:26
1111.96:296:25
1211.96:286:25
1312.06:286:25
1412.06:276:25
1512.06:276:25
1612.06:266:24
1712.06:266:24
1812.06:256:24
1912.06:256:24
2012.06:246:23
2112.06:246:23
2212.06:236:23
2312.06:226:23
2412.06:226:23
2512.06:216:22
2612.06:216:22
2712.06:206:22
2812.06:206:22
2912.06:196:22
3012.06:196:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.17 kWh/m².

For context, solar energy here swings from a low near 4.94 kWh/m² to a high of 5.48 kWh/m² in February across the year — September's 5.17 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Is September a good time to visit Demba?

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

3.7
Sightseeing
8th-best month of the year
5.1
Beach & pool
7th-best month of the year

September is a weaker month for outdoor sightseeing in Demba.

What to pack for Demba in September

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

In September, Demba sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Demba in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Demba peaks around March 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 12 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeMar 19UV 15Aug 12UV 5
UV index (midday)Level
Jan12Extreme
Feb13Extreme
Mar15Extreme
Apr14Extreme
May9Very high
Jun8Very high
Jul6High
Aug5High
Sep11Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Demba 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 Demba is worst in August — around 122 µg/m³ PM2.5 (unhealthy), about 8.4× the cleanest month (November, 15 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyModerateAug 13117 µg/m³Nov 1715 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb31Moderate
Mar19Moderate
Apr18Moderate
May28Moderate
Jun45Poor
Jul90Unhealthy
Aug122Unhealthy
Sep39Poor
Oct18Moderate
Nov15Moderate
Dec17Moderate
Location & terrain

Where is Demba?

Demba sits at 5.5°S, 22.3°E, 632 m above sea level, in Democratic Republic of the Congo. The nearest listed city is Kananga, 47 km away.

Kabeya-KamwangaLusamboMiabiMbuji-MayiTshikapa

Topography around Demba

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

Within 3 km, the terrain around Demba has only modest variations in elevation — a maximum elevation change of 109 m around an average of 582 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 170 m; within 80 km, significant variations in elevation — a maximum elevation change of 376 m.

The land around Demba is covered by trees (40%), shrubs (24%) and grassland (21%) within 3 km, trees (72%) and shrubs (22%) within 16 km, and trees (79%) within 80 km.

3 km
109 m
16 km
170 m
80 km
376 m
treesshrubsgrasslandartificial surfaces
September weather nearby: Kananga 47 km · Luebo 95 km · Mweka 106 km · Kabeya-Kamwanga 122 km · Lusambo 142 km · Miabi 148 km · Mbuji-Mayi 162 km · Tshikapa 192 km

Democratic Republic of the Congo travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 42% of US
price level, 2025
GDP per capita
$807
2025
Happiness
3.8 / 10
World Happiness, 2025
Safe drinking water
12%
of population, 2024
Road deaths
34.9
per 100k/yr, 2019
Income group
Low
World Bank
English
Very low
EF EPI 400

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 Demba (-5.4957°, 22.2696°, elevation 632 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).