Nioki weather in September

In September, Nioki sees average daytime highs of 30°C and overnight lows near 23°C, with 114 mm of rain across 20.7 wet days and about 12 hours of daylight. It is the 7th-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 9% 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 Nioki's 5th-clearest and 3rd-windiest month. For the whole year in context, see Nioki's year-round climate.

Daytime high: 30°; 7th warmest
Overnight low: 23°; 5th coldest
Rainfall: 114 mm; 20.7 wet days
Daylight: 12 hours; 5:44 AM – 5:43 PM
Cloud cover: 73%; 5th clearest
Wind: 5 km/h; 3rd windiest
Solar energy: 5.28 kWh/m²
Travel score: 3.5; out of 10

Nioki is is a locality in the Territory of Kutu in the province of Mai-Ndombe in Congo-Kinshasa..

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

← August Nioki 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 30°C through the month.

A typical September day in Nioki reaches about 30°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°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)	31	31	31	31	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
Avg low (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23

	Avg high (°C)	Avg low (°C)
1	31	23
2	31	23
3	31	23
4	31	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	30	23
16	30	23
17	30	23
18	30	23
19	30	23
20	30	23
21	30	23
22	30	23
23	30	23
24	30	23
25	30	23
26	30	23
27	30	23
28	30	23
29	30	23
30	30	23

How September really feels in Nioki

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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Nioki weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 23°	129	19.5	12.1	3.6
Feb	31° / 23°	135	18	12.1	3.4
Mar	31° / 23°	152	21.5	12	3.2
Apr	31° / 23°	153	22.4	11.9	3.1
May	30° / 23°	102	17.4	11.9	3.9
Jun	30° / 23°	30	7.3	11.8	5.2
Jul	30° / 23°	22	5.2	11.9	5.3
Aug	30° / 23°	60	13.5	11.9	4.3
Sep	30° / 23°	114	20.7	12	3.5
Oct	30° / 22°	189	25.5	12.1	3.2
Nov	30° / 23°	177	23.9	12.1	3.3
Dec	30° / 23°	171	23.4	12.2	3.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 70%. 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 (%)	34	34	34	34	34	33	34	33	34	33	34	33	32	32	31	30	30	30	29	28	28	27	26	26	25	25	25	24	24	24
Cloudier (%)	66	66	66	66	66	67	66	67	66	67	66	67	68	68	69	70	70	70	71	72	72	73	74	74	75	75	75	76	76	76

	Clearer (%)	Cloudier (%)
1	34	66
2	34	66
3	34	66
4	34	66
5	34	66
6	33	67
7	34	66
8	33	67
9	34	66
10	33	67
11	34	66
12	33	67
13	32	68
14	32	68
15	31	69
16	30	70
17	30	70
18	30	70
19	29	71
20	28	72
21	28	72
22	27	73
23	26	74
24	26	74
25	25	75
26	25	75
27	25	75
28	24	76
29	24	76
30	24	76

Chance of precipitation in September

Any precipitation

Nioki gets around 114 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 69% and peaks near 75% 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 (%)	57	58	60	61	62	63	64	65	66	67	68	69	70	70	71	71	72	72	72	72	73	73	73	73	74	74	74	74	75	75

	Rain chance (%)
1	57
2	58
3	60
4	61
5	62
6	63
7	64
8	65
9	66
10	67
11	68
12	69
13	70
14	70
15	71
16	71
17	72
18	72
19	72
20	72
21	73
22	73
23	73
24	73
25	74
26	74
27	74
28	74
29	75
30	75

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 96% 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 (%)	13	12	11	10	9	8	7	6	5	5	4	3	3	2	2	2	1	1	1	1	1	0	0	0	0	0	0	0	0	0
Oppressive (%)	87	88	89	90	91	92	93	94	95	95	96	97	97	98	98	98	99	99	99	99	99	100	100	100	100	100	100	100	99	99
Miserable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1

	Muggy (%)	Oppressive (%)	Miserable (%)
1	13	87	0
2	12	88	0
3	11	89	0
4	10	90	0
5	9	91	0
6	8	92	0
7	7	93	0
8	6	94	0
9	5	95	0
10	5	95	0
11	4	96	0
12	3	97	0
13	3	97	0
14	2	98	0
15	2	98	0
16	2	98	0
17	1	99	0
18	1	99	0
19	1	99	0
20	1	99	0
21	1	99	0
22	0	100	0
23	0	100	0
24	0	100	0
25	0	100	0
26	0	100	0
27	0	100	0
28	0	100	0
29	0	99	1
30	0	99	1

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.

	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)	6	6	6	6	6	6	6	6	6	6	6	6	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
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	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	6	calm
11	6	calm
12	6	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	5	calm
22	5	calm
23	5	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	calm

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 5:51 AM to 5:38 AM, and sunset from 5:47 PM to 5:39 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)	11.9	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)	5:51	5:50	5:50	5:49	5:49	5:48	5:48	5:48	5:47	5:47	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	5:40	5:40	5:40	5:39	5:39	5:38	5:38
Sunset (PM)	5:47	5:47	5:47	5:47	5:46	5:46	5:46	5:45	5:45	5:45	5:45	5:44	5:44	5:44	5:43	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

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	5:51	5:47
2	12.0	5:50	5:47
3	12.0	5:50	5:47
4	12.0	5:49	5:47
5	12.0	5:49	5:46
6	12.0	5:48	5:46
7	12.0	5:48	5:46
8	12.0	5:48	5:45
9	12.0	5:47	5:45
10	12.0	5:47	5:45
11	12.0	5:46	5:45
12	12.0	5:46	5:44
13	12.0	5:45	5:44
14	12.0	5:45	5:44
15	12.0	5:44	5:43
16	12.0	5:44	5:43
17	12.0	5:44	5:43
18	12.0	5:43	5:43
19	12.0	5:43	5:42
20	12.0	5:42	5:42
21	12.0	5:42	5:42
22	12.0	5:41	5:41
23	12.0	5:41	5:41
24	12.0	5:40	5:41
25	12.0	5:40	5:41
26	12.0	5:40	5:40
27	12.0	5:39	5:40
28	12.0	5:39	5:40
29	12.0	5:38	5:39
30	12.0	5:38	5:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.28 kWh/m².

For context, solar energy here swings from a low near 4.91 kWh/m² to a high of 5.44 kWh/m² in February across the year — September's 5.28 kWh/m² sits near the top of that range.

	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)	5.3	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	5.3	5.3	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2
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	5.3	Bright
2	5.3	Bright
3	5.3	Bright
4	5.3	Bright
5	5.3	Bright
6	5.3	Bright
7	5.3	Bright
8	5.3	Bright
9	5.3	Bright
10	5.3	Bright
11	5.3	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	5.2	Bright
23	5.2	Bright
24	5.2	Bright
25	5.2	Bright
26	5.2	Bright
27	5.2	Bright
28	5.2	Bright
29	5.2	Bright
30	5.2	Bright

Planning a trip in September

Is September a good time to visit Nioki?

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

3.5

Sightseeing

6th-best month of the year

4.9

Beach & pool

7th-best month of the year

September is a weaker month for outdoor sightseeing in Nioki.

What to pack for Nioki in September

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

In September, Nioki sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Nioki 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 Nioki peaks around March 17 at about 13 (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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	12	13	13	13	9	7	7	6	10	12	12	10
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	High	High	Extreme	Extreme	Extreme	Very high

	UV index (midday)	Level
Jan	12	Extreme
Feb	13	Extreme
Mar	13	Extreme
Apr	13	Extreme
May	9	Very high
Jun	7	Very high
Jul	7	High
Aug	6	High
Sep	10	Extreme
Oct	12	Extreme
Nov	12	Extreme
Dec	10	Very high

Air quality in Nioki 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 Nioki is worst in August — around 87 µg/m³ PM2.5 (unhealthy), about 6.8× 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)	22	29	25	18	27	46	67	87	40	15	13	17
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Unhealthy	Unhealthy	Poor	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	22	Moderate
Feb	29	Moderate
Mar	25	Moderate
Apr	18	Moderate
May	27	Moderate
Jun	46	Poor
Jul	67	Unhealthy
Aug	87	Unhealthy
Sep	40	Poor
Oct	15	Moderate
Nov	13	Moderate
Dec	17	Moderate

Location & terrain

Where is Nioki?

Nioki sits at 2.7°S, 17.7°E, 326 m above sea level, in Democratic Republic of the Congo. The nearest listed city is Kutu, 51 km away.

Topography around Nioki

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

Within 3 km, the terrain around Nioki has only modest variations in elevation — a maximum elevation change of 59 m around an average of 300 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 65 m; within 80 km, only modest variations in elevation — a maximum elevation change of 192 m.

The land around Nioki is covered by trees (31%) and wetland (23%) within 3 km, trees (39%) and grassland (29%) within 16 km, and trees (53%) and grassland (37%) within 80 km.

3 km

59 m

trees 31%

16 km

65 m

trees 39%

80 km

192 m

trees 53%

treesshrubsgrasslandartificial surfacesbare terrainwaterwetland

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

September weather nearby: Kutu 51 km · Bandundu Province 75 km · Mushie 91 km · Inongo 110 km · Dungu 163 km · Bolobo 174 km · Mossaka 194 km · Gamboma 223 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 Nioki (-2.7204°, 17.69°, elevation 326 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	31	23
2	31	23
3	31	23
4	31	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	30	23
16	30	23
17	30	23
18	30	23
19	30	23
20	30	23
21	30	23
22	30	23
23	30	23
24	30	23
25	30	23
26	30	23
27	30	23
28	30	23
29	30	23
30	30	23

	Clearer (%)	Cloudier (%)
1	34	66
2	34	66
3	34	66
4	34	66
5	34	66
6	33	67
7	34	66
8	33	67
9	34	66
10	33	67
11	34	66
12	33	67
13	32	68
14	32	68
15	31	69
16	30	70
17	30	70
18	30	70
19	29	71
20	28	72
21	28	72
22	27	73
23	26	74
24	26	74
25	25	75
26	25	75
27	25	75
28	24	76
29	24	76
30	24	76

	Rain chance (%)
1	57
2	58
3	60
4	61
5	62
6	63
7	64
8	65
9	66
10	67
11	68
12	69
13	70
14	70
15	71
16	71
17	72
18	72
19	72
20	72
21	73
22	73
23	73
24	73
25	74
26	74
27	74
28	74
29	75
30	75

	Muggy (%)	Oppressive (%)	Miserable (%)
1	13	87	0
2	12	88	0
3	11	89	0
4	10	90	0
5	9	91	0
6	8	92	0
7	7	93	0
8	6	94	0
9	5	95	0
10	5	95	0
11	4	96	0
12	3	97	0
13	3	97	0
14	2	98	0
15	2	98	0
16	2	98	0
17	1	99	0
18	1	99	0
19	1	99	0
20	1	99	0
21	1	99	0
22	0	100	0
23	0	100	0
24	0	100	0
25	0	100	0
26	0	100	0
27	0	100	0
28	0	100	0
29	0	99	1
30	0	99	1

	Avg high (°C)	Avg low (°C)
1	31	23
2	31	23
3	31	23
4	31	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	30	23
16	30	23
17	30	23
18	30	23
19	30	23
20	30	23
21	30	23
22	30	23
23	30	23
24	30	23
25	30	23
26	30	23
27	30	23
28	30	23
29	30	23
30	30	23

	Clearer (%)	Cloudier (%)
1	34	66
2	34	66
3	34	66
4	34	66
5	34	66
6	33	67
7	34	66
8	33	67
9	34	66
10	33	67
11	34	66
12	33	67
13	32	68
14	32	68
15	31	69
16	30	70
17	30	70
18	30	70
19	29	71
20	28	72
21	28	72
22	27	73
23	26	74
24	26	74
25	25	75
26	25	75
27	25	75
28	24	76
29	24	76
30	24	76

	Rain chance (%)
1	57
2	58
3	60
4	61
5	62
6	63
7	64
8	65
9	66
10	67
11	68
12	69
13	70
14	70
15	71
16	71
17	72
18	72
19	72
20	72
21	73
22	73
23	73
24	73
25	74
26	74
27	74
28	74
29	75
30	75

	Muggy (%)	Oppressive (%)	Miserable (%)
1	13	87	0
2	12	88	0
3	11	89	0
4	10	90	0
5	9	91	0
6	8	92	0
7	7	93	0
8	6	94	0
9	5	95	0
10	5	95	0
11	4	96	0
12	3	97	0
13	3	97	0
14	2	98	0
15	2	98	0
16	2	98	0
17	1	99	0
18	1	99	0
19	1	99	0
20	1	99	0
21	1	99	0
22	0	100	0
23	0	100	0
24	0	100	0
25	0	100	0
26	0	100	0
27	0	100	0
28	0	100	0
29	0	99	1
30	0	99	1

	Avg high (°C)	Avg low (°C)
1	31	23
2	31	23
3	31	23
4	31	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	30	23
16	30	23
17	30	23
18	30	23
19	30	23
20	30	23
21	30	23
22	30	23
23	30	23
24	30	23
25	30	23
26	30	23
27	30	23
28	30	23
29	30	23
30	30	23

	Clearer (%)	Cloudier (%)
1	34	66
2	34	66
3	34	66
4	34	66
5	34	66
6	33	67
7	34	66
8	33	67
9	34	66
10	33	67
11	34	66
12	33	67
13	32	68
14	32	68
15	31	69
16	30	70
17	30	70
18	30	70
19	29	71
20	28	72
21	28	72
22	27	73
23	26	74
24	26	74
25	25	75
26	25	75
27	25	75
28	24	76
29	24	76
30	24	76

	Rain chance (%)
1	57
2	58
3	60
4	61
5	62
6	63
7	64
8	65
9	66
10	67
11	68
12	69
13	70
14	70
15	71
16	71
17	72
18	72
19	72
20	72
21	73
22	73
23	73
24	73
25	74
26	74
27	74
28	74
29	75
30	75

	Muggy (%)	Oppressive (%)	Miserable (%)
1	13	87	0
2	12	88	0
3	11	89	0
4	10	90	0
5	9	91	0
6	8	92	0
7	7	93	0
8	6	94	0
9	5	95	0
10	5	95	0
11	4	96	0
12	3	97	0
13	3	97	0
14	2	98	0
15	2	98	0
16	2	98	0
17	1	99	0
18	1	99	0
19	1	99	0
20	1	99	0
21	1	99	0
22	0	100	0
23	0	100	0
24	0	100	0
25	0	100	0
26	0	100	0
27	0	100	0
28	0	100	0
29	0	99	1
30	0	99	1