Inongo weather in September

In September, Inongo sees average daytime highs of 29°C and overnight lows near 25°C, with 187 mm of rain across 24.4 wet days and about 12 hours of daylight. It is the 10th-warmest and 4th-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 13% of the time in September, and the air most often feels oppressive.

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

Daytime high: 29°; 10th warmest
Overnight low: 25°; 1st coldest
Rainfall: 187 mm; 24.4 wet days
Daylight: 12 hours; 5:41 AM – 5:41 PM
Cloud cover: 71%; 5th clearest
Wind: 9 km/h; 3rd windiest
Solar energy: 5.32 kWh/m²
Travel score: 3.7; out of 10

Inongo is capital of Mai-Ndombe province, DR Congo.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Inongo year-round climate October →Best places to visit in September

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

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 Inongo reaches about 29°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	28	28	28	28	28	28	28	28	28	28	28	28	28	28
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25

	Avg high (°C)	Avg low (°C)
1	29	25
2	29	25
3	29	25
4	29	25
5	29	25
6	29	25
7	29	25
8	29	25
9	29	25
10	29	25
11	29	25
12	29	25
13	29	25
14	29	25
15	29	25
16	29	25
17	28	25
18	28	25
19	28	25
20	28	25
21	28	25
22	28	25
23	28	25
24	28	25
25	28	25
26	28	25
27	28	25
28	28	25
29	28	25
30	28	25

How September really feels in Inongo

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

heat index over the day's high

Days feeling ≤ 0°C

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.

Inongo weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 26°	155	19.1	12.1	4.0
Feb	30° / 26°	149	17.6	12.1	3.8
Mar	29° / 26°	176	21.6	12	3.7
Apr	29° / 26°	176	22.4	12	3.7
May	29° / 26°	122	20.5	11.9	4.1
Jun	29° / 26°	53	11.8	11.9	5.1
Jul	29° / 25°	53	11.7	11.9	5.2
Aug	29° / 25°	114	18.7	11.9	4.4
Sep	29° / 25°	187	24.4	12	3.7
Oct	28° / 25°	216	26.9	12	3.5
Nov	28° / 25°	204	25.3	12.1	3.6
Dec	29° / 25°	205	24.7	12.1	3.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% 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 68%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	37	37	37	37	37	36	36	36	36	36	36	35	34	33	33	32	31	31	30	30	30	29	29	28	28	27	27	27	27	27
Cloudier (%)	63	63	63	63	63	64	64	64	64	64	64	65	66	67	67	68	69	69	70	70	70	71	71	72	72	73	73	73	73	73

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	37	63
6	36	64
7	36	64
8	36	64
9	36	64
10	36	64
11	36	64
12	35	65
13	34	66
14	33	67
15	33	67
16	32	68
17	31	69
18	31	69
19	30	70
20	30	70
21	30	70
22	29	71
23	29	71
24	28	72
25	28	72
26	27	73
27	27	73
28	27	73
29	27	73
30	27	73

Chance of precipitation in September

Any precipitation

Inongo gets around 187 mm of rain over 24.4 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 81% and peaks near 83% on the wettest days. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	74	75	76	77	78	79	80	81	81	82	82	82	82	82	82	82	82	82	82	82	82	82	82	82	82	82	83	83	83	83

	Rain chance (%)
1	74
2	75
3	76
4	77
5	78
6	79
7	80
8	81
9	81
10	82
11	82
12	82
13	82
14	82
15	82
16	82
17	82
18	82
19	82
20	82
21	82
22	82
23	82
24	82
25	82
26	82
27	83
28	83
29	83
30	83

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 99% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Muggy (%)	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1
Oppressive (%)	99	99	99	99	99	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	99	99	99

	Muggy (%)	Oppressive (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	0	100
7	0	100
8	0	100
9	0	100
10	0	100
11	0	100
12	0	100
13	0	100
14	0	100
15	0	100
16	0	100
17	0	100
18	0	100
19	0	100
20	0	100
21	0	100
22	0	100
23	0	100
24	0	100
25	0	100
26	0	100
27	0	100
28	1	99
29	1	99
30	1	99

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	9	calm
2	9	calm
3	9	calm
4	9	calm
5	9	calm
6	9	calm
7	9	calm
8	9	calm
9	9	calm
10	9	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	9	calm
17	9	calm
18	9	calm
19	9	calm
20	9	calm
21	9	calm
22	9	calm
23	9	calm
24	9	calm
25	9	calm
26	9	calm
27	9	calm
28	9	calm
29	9	calm
30	9	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours 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 0 minutes over September. Sunrise moves from 5:48 AM to 5:36 AM, and sunset from 5:45 PM to 5:37 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	5:48	5:47	5:47	5:46	5:46	5:46	5:45	5:45	5:44	5:44	5:44	5:43	5:43	5:42	5:42	5:41	5:41	5:41	5:40	5:40	5:39	5:39	5:39	5:38	5:38	5:37	5:37	5:36	5:36	5:36
Sunset (PM)	5:45	5:45	5:45	5:45	5:44	5:44	5:44	5:43	5:43	5:43	5:42	5:42	5:42	5:41	5:41	5:41	5:41	5:40	5:40	5:40	5:39	5:39	5:39	5:38	5:38	5:38	5:37	5:37	5:37	5:37

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	5:48	5:45
2	12.0	5:47	5:45
3	12.0	5:47	5:45
4	12.0	5:46	5:45
5	12.0	5:46	5:44
6	12.0	5:46	5:44
7	12.0	5:45	5:44
8	12.0	5:45	5:43
9	12.0	5:44	5:43
10	12.0	5:44	5:43
11	12.0	5:44	5:42
12	12.0	5:43	5:42
13	12.0	5:43	5:42
14	12.0	5:42	5:41
15	12.0	5:42	5:41
16	12.0	5:41	5:41
17	12.0	5:41	5:41
18	12.0	5:41	5:40
19	12.0	5:40	5:40
20	12.0	5:40	5:40
21	12.0	5:39	5:39
22	12.0	5:39	5:39
23	12.0	5:39	5:39
24	12.0	5:38	5:38
25	12.0	5:38	5:38
26	12.0	5:37	5:38
27	12.0	5:37	5:37
28	12.0	5:36	5:37
29	12.0	5:36	5:37
30	12.0	5:36	5:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.32 kWh/m².

For context, solar energy here swings from a low near 5.14 kWh/m² to a high of 5.6 kWh/m² in February across the year — September's 5.32 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.4	Bright
2	5.4	Bright
3	5.4	Bright
4	5.4	Bright
5	5.4	Bright
6	5.4	Bright
7	5.4	Bright
8	5.4	Bright
9	5.4	Bright
10	5.4	Bright
11	5.4	Bright
12	5.3	Bright
13	5.3	Bright
14	5.3	Bright
15	5.3	Bright
16	5.3	Bright
17	5.3	Bright
18	5.3	Bright
19	5.3	Bright
20	5.3	Bright
21	5.3	Bright
22	5.3	Bright
23	5.3	Bright
24	5.3	Bright
25	5.3	Bright
26	5.3	Bright
27	5.3	Bright
28	5.3	Bright
29	5.3	Bright
30	5.3	Bright

Planning a trip in September

Is September a good time to visit Inongo?

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

3.7

Sightseeing

7th-best month of the year

4.5

Beach & pool

10th-best month of the year

September is a weaker month for outdoor sightseeing in Inongo.

What to pack for Inongo in September

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

In September, Inongo sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

UV index in Inongo 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 Inongo peaks around March 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 7 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	12	13	13	13	10	8	7	8	11	13	10	9
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Very high	Extreme	Extreme	Extreme	Very high

	UV index (midday)	Level
Jan	12	Extreme
Feb	13	Extreme
Mar	13	Extreme
Apr	13	Extreme
May	10	Very high
Jun	8	Very high
Jul	7	Very high
Aug	8	Very high
Sep	11	Extreme
Oct	13	Extreme
Nov	10	Extreme
Dec	9	Very high

Air quality in Inongo 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 Inongo is worst in August — around 61 µg/m³ PM2.5 (unhealthy), about 4.9× the cleanest month (November, 13 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	23	28	23	16	22	37	49	61	29	13	13	18
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Poor	Unhealthy	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	23	Moderate
Feb	28	Moderate
Mar	23	Moderate
Apr	16	Moderate
May	22	Moderate
Jun	37	Poor
Jul	49	Poor
Aug	61	Unhealthy
Sep	29	Moderate
Oct	13	Moderate
Nov	13	Moderate
Dec	18	Moderate

Location & terrain

Where is Inongo?

Inongo sits at 1.9°S, 18.3°E, 318 m above sea level, in Democratic Republic of the Congo. The nearest listed city is Kutu, 90 km away.

Topography around Inongo

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

Within 3 km, the terrain around Inongo has only modest variations in elevation — a maximum elevation change of 41 m around an average of 305 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 56 m; within 80 km, only modest variations in elevation — a maximum elevation change of 79 m.

The land around Inongo is covered by trees (48%) and water (29%) within 3 km, water (53%) and trees (44%) within 16 km, and trees (80%) within 80 km.

3 km

41 m

trees 48%

16 km

56 m

water 53%

80 km

79 m

trees 80%

treesshrubsgrasslandartificial surfaceswaterwetland

← August Inongo year-round climate October →Best places to visit in September

September weather nearby: Kutu 90 km · Nioki 110 km · Mossaka 183 km · Bandundu Province 184 km · Mushie 194 km · Dungu 199 km · Bolenge 214 km · Mbandaka 220 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 Inongo (-1.9275°, 18.2881°, elevation 318 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).

	Avg high (°C)	Avg low (°C)
1	29	25
2	29	25
3	29	25
4	29	25
5	29	25
6	29	25
7	29	25
8	29	25
9	29	25
10	29	25
11	29	25
12	29	25
13	29	25
14	29	25
15	29	25
16	29	25
17	28	25
18	28	25
19	28	25
20	28	25
21	28	25
22	28	25
23	28	25
24	28	25
25	28	25
26	28	25
27	28	25
28	28	25
29	28	25
30	28	25

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	37	63
6	36	64
7	36	64
8	36	64
9	36	64
10	36	64
11	36	64
12	35	65
13	34	66
14	33	67
15	33	67
16	32	68
17	31	69
18	31	69
19	30	70
20	30	70
21	30	70
22	29	71
23	29	71
24	28	72
25	28	72
26	27	73
27	27	73
28	27	73
29	27	73
30	27	73

	Rain chance (%)
1	74
2	75
3	76
4	77
5	78
6	79
7	80
8	81
9	81
10	82
11	82
12	82
13	82
14	82
15	82
16	82
17	82
18	82
19	82
20	82
21	82
22	82
23	82
24	82
25	82
26	82
27	83
28	83
29	83
30	83

	Muggy (%)	Oppressive (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	0	100
7	0	100
8	0	100
9	0	100
10	0	100
11	0	100
12	0	100
13	0	100
14	0	100
15	0	100
16	0	100
17	0	100
18	0	100
19	0	100
20	0	100
21	0	100
22	0	100
23	0	100
24	0	100
25	0	100
26	0	100
27	0	100
28	1	99
29	1	99
30	1	99

	Avg high (°C)	Avg low (°C)
1	29	25
2	29	25
3	29	25
4	29	25
5	29	25
6	29	25
7	29	25
8	29	25
9	29	25
10	29	25
11	29	25
12	29	25
13	29	25
14	29	25
15	29	25
16	29	25
17	28	25
18	28	25
19	28	25
20	28	25
21	28	25
22	28	25
23	28	25
24	28	25
25	28	25
26	28	25
27	28	25
28	28	25
29	28	25
30	28	25

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	37	63
6	36	64
7	36	64
8	36	64
9	36	64
10	36	64
11	36	64
12	35	65
13	34	66
14	33	67
15	33	67
16	32	68
17	31	69
18	31	69
19	30	70
20	30	70
21	30	70
22	29	71
23	29	71
24	28	72
25	28	72
26	27	73
27	27	73
28	27	73
29	27	73
30	27	73

	Rain chance (%)
1	74
2	75
3	76
4	77
5	78
6	79
7	80
8	81
9	81
10	82
11	82
12	82
13	82
14	82
15	82
16	82
17	82
18	82
19	82
20	82
21	82
22	82
23	82
24	82
25	82
26	82
27	83
28	83
29	83
30	83

	Muggy (%)	Oppressive (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	0	100
7	0	100
8	0	100
9	0	100
10	0	100
11	0	100
12	0	100
13	0	100
14	0	100
15	0	100
16	0	100
17	0	100
18	0	100
19	0	100
20	0	100
21	0	100
22	0	100
23	0	100
24	0	100
25	0	100
26	0	100
27	0	100
28	1	99
29	1	99
30	1	99

	Avg high (°C)	Avg low (°C)
1	29	25
2	29	25
3	29	25
4	29	25
5	29	25
6	29	25
7	29	25
8	29	25
9	29	25
10	29	25
11	29	25
12	29	25
13	29	25
14	29	25
15	29	25
16	29	25
17	28	25
18	28	25
19	28	25
20	28	25
21	28	25
22	28	25
23	28	25
24	28	25
25	28	25
26	28	25
27	28	25
28	28	25
29	28	25
30	28	25

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	37	63
6	36	64
7	36	64
8	36	64
9	36	64
10	36	64
11	36	64
12	35	65
13	34	66
14	33	67
15	33	67
16	32	68
17	31	69
18	31	69
19	30	70
20	30	70
21	30	70
22	29	71
23	29	71
24	28	72
25	28	72
26	27	73
27	27	73
28	27	73
29	27	73
30	27	73

	Rain chance (%)
1	74
2	75
3	76
4	77
5	78
6	79
7	80
8	81
9	81
10	82
11	82
12	82
13	82
14	82
15	82
16	82
17	82
18	82
19	82
20	82
21	82
22	82
23	82
24	82
25	82
26	82
27	83
28	83
29	83
30	83

	Muggy (%)	Oppressive (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	0	100
7	0	100
8	0	100
9	0	100
10	0	100
11	0	100
12	0	100
13	0	100
14	0	100
15	0	100
16	0	100
17	0	100
18	0	100
19	0	100
20	0	100
21	0	100
22	0	100
23	0	100
24	0	100
25	0	100
26	0	100
27	0	100
28	1	99
29	1	99
30	1	99