Mouila weather in September

In September, Mouila sees average daytime highs of 29°C and overnight lows near 22°C, with 101 mm of rain across 18.1 wet days and about 12 hours of daylight. It is the 9th-warmest and 9th-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 0% 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 Mouila's 10th-clearest and 2nd-windiest month. For the whole year in context, see Mouila's year-round climate.

Daytime high
29°
9th warmest
Overnight low
22°
4th coldest
Rainfall
101 mm
18.1 wet days
Daylight
12 hours
6:10 AM – 6:10 PM
Cloud cover
87%
10th clearest
Wind
5 km/h
2nd windiest
Solar energy
3.5 kWh/m²
Travel score
4.2
out of 10

Mouila is capital of the Ngounié region of Gabon.

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 29°C through the month.

A typical September day in Mouila 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 27°C and 30°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12821
22821
32821
42822
52822
62822
72822
82822
92822
102822
112822
122922
132922
142922
152922
162922
172922
182922
192922
202922
212922
222922
232922
242922
252922
262922
272922
282922
292922
302922

How September really feels in Mouila

Once humidity and wind are folded in, September averages 6 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
6
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.

Mouila 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
Jan30° / 22°30129.512.12.6
Feb31° / 23°2632612.12.5
Mar31° / 23°27328.5122.5
Apr31° / 23°23126.6122.6
May30° / 23°20526.911.93.0
Jun28° / 22°5310.211.95.6
Jul27° / 21°184.911.96.6
Aug27° / 21°246.211.96.3
Sep29° / 22°10118.1124.2
Oct30° / 23°29029.3122.8
Nov29° / 22°34729.612.12.7
Dec30° / 22°35329.812.12.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 1% of September, with mostly cloudy or overcast conditions the remaining 99%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
10100
20100
30100
40100
50100
60100
70100
80100
90100
100100
11199
12199
13199
14199
15199
16199
17199
18199
19199
20199
21199
22298
23298
24298
25298
26298
27298
28298
29397
30397

Chance of precipitation in September

Any precipitation

Mouila gets around 101 mm of rain over 18.1 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 61% and peaks near 84% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
132
234
335
437
538
640
742
844
947
1049
1152
1254
1357
1460
1562
1665
1767
1869
1971
2073
2174
2275
2377
2478
2579
2680
2781
2882
2983
3084

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 51% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
118217
218118
318019
407921
507723
607525
707327
807129
906832
1006535
1106238
1205941
1305545
1405248
1504852
1604555
1704258
1803961
1903763
2003466
2103268
2203070
2302773
2402674
2502476
2602278
2702179
2801981
2901882
3001783

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.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
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 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 6:17 AM to 6:05 AM, and sunset from 6:14 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:176:14
212.06:166:14
312.06:166:14
412.06:156:14
512.06:156:13
612.06:156:13
712.06:146:13
812.06:146:12
912.06:136:12
1012.06:136:12
1112.06:136:11
1212.06:126:11
1312.06:126:11
1412.06:116:10
1512.06:116:10
1612.06:106:10
1712.06:106:09
1812.06:106:09
1912.06:096:09
2012.06:096:09
2112.06:086:08
2212.06:086:08
2312.06:076:08
2412.06:076:07
2512.06:076:07
2612.06:066:07
2712.06:066:06
2812.06:056:06
2912.06:056:06
3012.06:056:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.5 kWh/m².

For context, solar energy here swings from a low near 3.19 kWh/m² to a high of 4.86 kWh/m² in March across the year — September's 3.5 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.3Moderate
23.3Moderate
33.3Moderate
43.3Moderate
53.3Moderate
63.3Moderate
73.4Moderate
83.4Moderate
93.4Moderate
103.4Moderate
113.4Moderate
123.4Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Mouila

In seasonPeak

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

Mouila's rainy season runs October–May, 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 Mouila?

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

4.2
Sightseeing
4th-best month of the year
5.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Mouila for sightseeing.

What to pack for Mouila in September

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

In September, Mouila sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 18 days see rain.

light clothesrain gear

UV index in Mouila 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 Mouila peaks around March 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 18UV 14Jun 18UV 7
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun7Very high
Jul9Very high
Aug9Very high
Sep12Extreme
Oct13Extreme
Nov11Extreme
Dec10Very high

Air quality in Mouila 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 Mouila is worst in June — around 23 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (October, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateJun 2323 µg/m³Oct 208 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb23Moderate
Mar15Moderate
Apr12Moderate
May15Moderate
Jun23Moderate
Jul23Moderate
Aug19Moderate
Sep13Moderate
Oct8Good
Nov10Good
Dec15Moderate
Location & terrain

Where is Mouila?

Mouila sits at 1.9°S, 11.1°E, 92 m above sea level, in Gabon. The nearest listed city is Tchibanga, 119 km away.

TchibangaLambarénéKoulamoutouOyamMossendjoMoandaFrancevillePort-Gentil

Topography around Mouila

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

Within 3 km, the terrain around Mouila has only modest variations in elevation — a maximum elevation change of 29 m around an average of 89 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 370 m; within 80 km, large variations in elevation — a maximum elevation change of 893 m.

The land around Mouila is covered by trees (62%) within 3 km, trees (78%) and grassland (21%) within 16 km, and trees (93%) within 80 km.

3 km
29 m
16 km
370 m
80 km
893 m
treesshrubsgrasslandartificial surfaceswater
September weather nearby: Tchibanga 119 km · Lambaréné 158 km · Koulamoutou 176 km · Oyam 190 km · Mossendjo 219 km · Moanda 241 km · Franceville 282 km · Port-Gentil 283 km

Gabon travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 37% of US
price level, 2025
GDP per capita
$8,263
2025
Happiness
5.2 / 10
World Happiness, 2025
Road deaths
23.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Protestant 46%Roman Catholic 30%Muslim 11%none 7%

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 Mouila (-1.8685°, 11.0559°, elevation 92 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).