Ouesso weather in September

In September, Ouesso sees average daytime highs of 29°C and overnight lows near 22°C, with 169 mm of rain across 25.1 wet days and about 12 hours of daylight. It is the 10th-warmest and 2nd-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 4% 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 Ouesso's 11th-clearest and 7th-windiest month. For the whole year in context, see Ouesso's year-round climate.

Daytime high: 29°; 10th warmest
Overnight low: 22°; 4th coldest
Rainfall: 169 mm; 25.1 wet days
Daylight: 12 hours; 5:50 AM – 5:50 PM
Cloud cover: 79%; 11th clearest
Wind: 5 km/h; 7th windiest
Solar energy: 4.8 kWh/m²
Travel score: 3.4; out of 10

Ouesso is city.

Density: 8,133/km²; people per km²

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

← August Ouesso 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 Ouesso reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°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	29	29	29	29	29	29	29	29	29	29	29	29	29	29
Avg low (°C)	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22

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

How September really feels in Ouesso

Once humidity and wind are folded in, September averages 21 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.

Ouesso weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 21°	53	9.2	11.9	4.6
Feb	31° / 22°	75	11.7	11.9	3.9
Mar	31° / 22°	139	19.8	12	3.3
Apr	31° / 23°	147	19.9	12	3.4
May	30° / 22°	115	20.2	12.1	3.7
Jun	29° / 22°	95	18.2	12.1	4.3
Jul	29° / 22°	91	17.8	12.1	4.5
Aug	29° / 22°	124	22.3	12.1	3.9
Sep	29° / 22°	169	25.1	12	3.4
Oct	29° / 22°	189	26.3	12	3.3
Nov	29° / 22°	159	22	11.9	3.6
Dec	30° / 22°	72	12.3	11.9	4.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 82%.

	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 (%)	16	17	17	17	17	18	18	18	19	19	19	19	19	19	19	19	19	19	19	19	19	18	18	18	18	18	18	17	17	17
Cloudier (%)	84	83	83	83	83	82	82	82	81	81	81	81	81	81	81	81	81	81	81	81	81	82	82	82	82	82	82	83	83	83

	Clearer (%)	Cloudier (%)
1	16	84
2	17	83
3	17	83
4	17	83
5	17	83
6	18	82
7	18	82
8	18	82
9	19	81
10	19	81
11	19	81
12	19	81
13	19	81
14	19	81
15	19	81
16	19	81
17	19	81
18	19	81
19	19	81
20	19	81
21	19	81
22	18	82
23	18	82
24	18	82
25	18	82
26	18	82
27	18	82
28	17	83
29	17	83
30	17	83

Chance of precipitation in September

Any precipitation

Ouesso gets around 169 mm of rain over 25.1 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 84% and peaks near 87% on the wettest days.

	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 (%)	83	83	83	83	83	83	83	83	83	83	83	83	83	83	83	83	83	83	83	83	83	84	84	85	85	85	86	86	86	87

	Rain chance (%)
1	83
2	83
3	83
4	83
5	83
6	83
7	83
8	83
9	83
10	83
11	83
12	83
13	83
14	83
15	83
16	83
17	83
18	83
19	83
20	83
21	83
22	84
23	84
24	85
25	85
26	85
27	86
28	86
29	86
30	87

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 98% 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 (%)	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1
Oppressive (%)	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99

	Muggy (%)	Oppressive (%)
1	2	98
2	2	98
3	2	98
4	2	98
5	2	98
6	2	98
7	2	98
8	2	98
9	2	98
10	2	98
11	2	98
12	2	98
13	2	98
14	2	98
15	2	98
16	2	98
17	2	98
18	2	98
19	2	98
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	1	99
26	1	99
27	1	99
28	1	99
29	1	99
30	1	99

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.

	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)	5	5	5	5	5	5	5	5	5	5	5	5	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	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	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 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 5:55 AM to 5:45 AM, and sunset from 5:56 PM to 5:45 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)	5:55	5:54	5:54	5:54	5:53	5:53	5:53	5:52	5:52	5:52	5:51	5:51	5:51	5:51	5:50	5:50	5:50	5:49	5:49	5:49	5:48	5:48	5:48	5:47	5:47	5:47	5:46	5:46	5:46	5:45
Sunset (PM)	5:56	5:56	5:56	5:55	5:55	5:54	5:54	5:54	5:53	5:53	5:52	5:52	5:52	5:51	5:51	5:50	5:50	5:50	5:49	5:49	5:48	5:48	5:47	5:47	5:47	5:46	5:46	5:45	5:45	5:45

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	5:55	5:56
2	12.0	5:54	5:56
3	12.0	5:54	5:56
4	12.0	5:54	5:55
5	12.0	5:53	5:55
6	12.0	5:53	5:54
7	12.0	5:53	5:54
8	12.0	5:52	5:54
9	12.0	5:52	5:53
10	12.0	5:52	5:53
11	12.0	5:51	5:52
12	12.0	5:51	5:52
13	12.0	5:51	5:52
14	12.0	5:51	5:51
15	12.0	5:50	5:51
16	12.0	5:50	5:50
17	12.0	5:50	5:50
18	12.0	5:49	5:50
19	12.0	5:49	5:49
20	12.0	5:49	5:49
21	12.0	5:48	5:48
22	12.0	5:48	5:48
23	12.0	5:48	5:47
24	12.0	5:47	5:47
25	12.0	5:47	5:47
26	12.0	5:47	5:46
27	12.0	5:46	5:46
28	12.0	5:46	5:45
29	12.0	5:46	5:45
30	12.0	5:45	5:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.8 kWh/m².

For context, solar energy here swings from a low near 4.78 kWh/m² to a high of 5.47 kWh/m² in February across the year — September's 4.8 kWh/m² sits near the bottom.

	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)	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8
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	4.8	Bright
2	4.8	Bright
3	4.8	Bright
4	4.8	Bright
5	4.8	Bright
6	4.8	Bright
7	4.8	Bright
8	4.8	Bright
9	4.8	Bright
10	4.8	Bright
11	4.8	Bright
12	4.8	Bright
13	4.8	Bright
14	4.8	Bright
15	4.8	Bright
16	4.8	Bright
17	4.8	Bright
18	4.8	Bright
19	4.8	Bright
20	4.8	Bright
21	4.8	Bright
22	4.8	Bright
23	4.8	Bright
24	4.8	Bright
25	4.8	Bright
26	4.8	Bright
27	4.8	Bright
28	4.8	Bright
29	4.8	Bright
30	4.8	Bright

Planning a trip in September

Is September a good time to visit Ouesso?

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

3.4

Sightseeing

9th-best month of the year

4.3

Beach & pool

11th-best month of the year

September is a weaker month for outdoor sightseeing in Ouesso.

What to pack for Ouesso in September

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

In September, Ouesso sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in Ouesso in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ouesso peaks around March 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 9 (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)	11	12	14	12	11	9	9	11	12	13	10	9
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	11	Extreme
Feb	12	Extreme
Mar	14	Extreme
Apr	12	Extreme
May	11	Extreme
Jun	9	Very high
Jul	9	Very high
Aug	11	Extreme
Sep	12	Extreme
Oct	13	Extreme
Nov	10	Very high
Dec	9	Very high

Air quality in Ouesso 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 Ouesso is worst in February — around 43 µg/m³ PM2.5 (poor), about 4.8× the cleanest month (September, 9 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)	32	43	26	17	14	20	23	18	9	9	16	26
Level	Moderate	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	32	Moderate
Feb	43	Poor
Mar	26	Moderate
Apr	17	Moderate
May	14	Moderate
Jun	20	Moderate
Jul	23	Moderate
Aug	18	Moderate
Sep	9	Good
Oct	9	Good
Nov	16	Moderate
Dec	26	Moderate

Location & terrain

Where is Ouesso?

Ouesso sits at 1.6°N, 16.1°E, 348 m above sea level, in Republic of the Congo. The nearest listed city is Pokola, 38 km away.

Topography around Ouesso

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

Within 3 km, the terrain around Ouesso has only modest variations in elevation — a maximum elevation change of 47 m around an average of 346 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 215 m; within 80 km, significant variations in elevation — a maximum elevation change of 366 m.

The land around Ouesso is covered by trees (53%) and artificial surfaces (23%) within 3 km, trees (95%) within 16 km, and trees (99%) within 80 km.

3 km

47 m

trees 53%

16 km

215 m

trees 95%

80 km

366 m

trees 99%

treesgrasslandartificial surfaceswater

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

September weather nearby: Pokola 38 km · Makoua 185 km · Nola 213 km · Impfondo 223 km · Owando 234 km · Yokadouma 239 km · Berbérati 296 km · Bolenge 300 km

Republic of the Congo travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / E; 230 V · 50 Hz
Prices: ≈ 35% of US; price level, 2025
GDP per capita: $2,515; 2025
Happiness: 4.5 / 10; World Happiness, 2025
Safe drinking water: 46%; of population, 2021
Road deaths: 29.7; per 100k/yr, 2019
Income group: Lower middle; World Bank
Religion

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 Ouesso (1.6136°, 16.0517°, elevation 348 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	22
2	29	22
3	29	22
4	29	22
5	29	22
6	29	22
7	29	22
8	29	22
9	29	22
10	29	22
11	29	22
12	29	22
13	29	22
14	29	22
15	29	22
16	29	22
17	29	22
18	29	22
19	29	22
20	29	22
21	29	22
22	29	22
23	29	22
24	29	22
25	29	22
26	29	22
27	29	22
28	29	22
29	29	22
30	29	22

	Clearer (%)	Cloudier (%)
1	16	84
2	17	83
3	17	83
4	17	83
5	17	83
6	18	82
7	18	82
8	18	82
9	19	81
10	19	81
11	19	81
12	19	81
13	19	81
14	19	81
15	19	81
16	19	81
17	19	81
18	19	81
19	19	81
20	19	81
21	19	81
22	18	82
23	18	82
24	18	82
25	18	82
26	18	82
27	18	82
28	17	83
29	17	83
30	17	83

	Rain chance (%)
1	83
2	83
3	83
4	83
5	83
6	83
7	83
8	83
9	83
10	83
11	83
12	83
13	83
14	83
15	83
16	83
17	83
18	83
19	83
20	83
21	83
22	84
23	84
24	85
25	85
26	85
27	86
28	86
29	86
30	87

	Muggy (%)	Oppressive (%)
1	2	98
2	2	98
3	2	98
4	2	98
5	2	98
6	2	98
7	2	98
8	2	98
9	2	98
10	2	98
11	2	98
12	2	98
13	2	98
14	2	98
15	2	98
16	2	98
17	2	98
18	2	98
19	2	98
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	1	99
26	1	99
27	1	99
28	1	99
29	1	99
30	1	99

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

	Clearer (%)	Cloudier (%)
1	16	84
2	17	83
3	17	83
4	17	83
5	17	83
6	18	82
7	18	82
8	18	82
9	19	81
10	19	81
11	19	81
12	19	81
13	19	81
14	19	81
15	19	81
16	19	81
17	19	81
18	19	81
19	19	81
20	19	81
21	19	81
22	18	82
23	18	82
24	18	82
25	18	82
26	18	82
27	18	82
28	17	83
29	17	83
30	17	83

	Rain chance (%)
1	83
2	83
3	83
4	83
5	83
6	83
7	83
8	83
9	83
10	83
11	83
12	83
13	83
14	83
15	83
16	83
17	83
18	83
19	83
20	83
21	83
22	84
23	84
24	85
25	85
26	85
27	86
28	86
29	86
30	87

	Muggy (%)	Oppressive (%)
1	2	98
2	2	98
3	2	98
4	2	98
5	2	98
6	2	98
7	2	98
8	2	98
9	2	98
10	2	98
11	2	98
12	2	98
13	2	98
14	2	98
15	2	98
16	2	98
17	2	98
18	2	98
19	2	98
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	1	99
26	1	99
27	1	99
28	1	99
29	1	99
30	1	99

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

	Clearer (%)	Cloudier (%)
1	16	84
2	17	83
3	17	83
4	17	83
5	17	83
6	18	82
7	18	82
8	18	82
9	19	81
10	19	81
11	19	81
12	19	81
13	19	81
14	19	81
15	19	81
16	19	81
17	19	81
18	19	81
19	19	81
20	19	81
21	19	81
22	18	82
23	18	82
24	18	82
25	18	82
26	18	82
27	18	82
28	17	83
29	17	83
30	17	83

	Rain chance (%)
1	83
2	83
3	83
4	83
5	83
6	83
7	83
8	83
9	83
10	83
11	83
12	83
13	83
14	83
15	83
16	83
17	83
18	83
19	83
20	83
21	83
22	84
23	84
24	85
25	85
26	85
27	86
28	86
29	86
30	87

	Muggy (%)	Oppressive (%)
1	2	98
2	2	98
3	2	98
4	2	98
5	2	98
6	2	98
7	2	98
8	2	98
9	2	98
10	2	98
11	2	98
12	2	98
13	2	98
14	2	98
15	2	98
16	2	98
17	2	98
18	2	98
19	2	98
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	1	99
26	1	99
27	1	99
28	1	99
29	1	99
30	1	99