Mouyondzi weather in September

In September, Mouyondzi sees average daytime highs of 29°C and overnight lows near 21°C, with 15 mm of rain across 4.6 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 1% of the time in September, and the air most often feels muggy.

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 Mouyondzi's 10th-clearest and 2nd-windiest month. For the whole year in context, see Mouyondzi's year-round climate.

Daytime high
29°
9th warmest
Overnight low
21°
4th coldest
Rainfall
15 mm
4.6 wet days
Daylight
12 hours
5:59 AM – 5:58 PM
Cloud cover
82%
10th clearest
Wind
7 km/h
2nd windiest
Solar energy
4.06 kWh/m²
Travel score
5.5
out of 10

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 Mouyondzi reaches about 29°C in the afternoon and slips back to 21°C overnight — a 8°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 warmer than August and about 1°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52921
62921
72921
82921
92921
102921
112921
122921
132921
142921
152921
162921
172921
182921
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022

How September really feels in Mouyondzi

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

Mouyondzi 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°13722.612.23.4
Feb31° / 22°11418.312.13.4
Mar31° / 22°11319.9123.2
Apr31° / 22°13120.811.93.1
May30° / 22°6614.411.84.3
Jun28° / 20°40.811.86.9
Jul28° / 19°10.211.87.4
Aug28° / 20°30.711.96.8
Sep29° / 21°154.6125.5
Oct30° / 22°9718.312.13.7
Nov30° / 22°17325.212.23.1
Dec30° / 22°16925.312.23.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 89%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1694
2694
3694
4694
5793
6793
7793
8793
9892
10892
11892
12991
13991
141090
151090
161189
171189
181288
191288
201387
211387
221387
231486
241486
251486
261585
271585
281585
291585
301684

Chance of precipitation in September

Any precipitation

Mouyondzi gets around 15 mm of rain over 4.6 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 16% and peaks near 28% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
15
25
36
47
57
68
79
810
911
1012
1112
1213
1314
1415
1516
1617
1717
1818
1918
2019
2120
2220
2321
2422
2523
2624
2725
2826
2927
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 87% of days. Sticky, muggy-or-worse air turns up on roughly 90% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
126740
224760
322780
420800
519810
617830
716840
815850
914860
1013870
1112880
1212880
1311890
1410891
159901
169901
178911
187921
197912
206922
216922
225923
235923
244924
253925
263916
272917
282908
2928810
3028711

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:06 AM to 5:53 AM, and sunset from 6:02 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:066:02
211.96:066:01
311.96:056:01
411.96:056:01
511.96:056:01
611.96:046:01
711.96:046:00
811.96:036:00
912.06:036:00
1012.06:026:00
1112.06:025:59
1212.06:015:59
1312.06:015:59
1412.06:005:58
1512.06:005:58
1612.05:595:58
1712.05:595:58
1812.05:585:57
1912.05:585:57
2012.05:575:57
2112.05:575:57
2212.05:565:56
2312.05:565:56
2412.05:555:56
2512.05:555:56
2612.05:545:55
2712.05:545:55
2812.05:545:55
2912.05:535:55
3012.05:535:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.06 kWh/m².

For context, solar energy here swings from a low near 3.83 kWh/m² to a high of 5.05 kWh/m² in March across the year — September's 4.06 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
74.0Moderate
84.0Moderate
94.0Moderate
104.0Moderate
114.0Bright
124.0Bright
134.0Bright
144.0Bright
154.0Bright
164.1Bright
174.1Bright
184.1Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.2Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.2Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Mouyondzi

In seasonPeak

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

Mouyondzi's rainy season runs October–April, 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 Mouyondzi?

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

5.5
Sightseeing
4th-best month of the year
7.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Mouyondzi for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mouyondzi in September

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

In September, Mouyondzi sees daytime highs around 29°C and nights near 21°C. Pack light clothes. About 5 days see rain.

light clothes

UV index in Mouyondzi 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 Mouyondzi peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeMar 16UV 15Jun 23UV 7
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar15Extreme
Apr13Extreme
May9Very high
Jun7High
Jul7High
Aug7High
Sep10Extreme
Oct14Extreme
Nov11Extreme
Dec10Very high

Air quality in Mouyondzi 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 Mouyondzi is worst in August — around 52 µg/m³ PM2.5 (poor), about 4.2× the cleanest month (November, 13 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateAug 1851 µg/m³Nov 1813 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar18Moderate
Apr17Moderate
May25Moderate
Jun38Poor
Jul44Poor
Aug52Poor
Sep47Poor
Oct18Moderate
Nov13Moderate
Dec16Moderate
Location & terrain

Where is Mouyondzi?

Mouyondzi sits at 4.0°S, 13.9°E, 510 m above sea level, in Republic of the Congo. The nearest listed city is Bouansa, 31 km away.

SibitiNkayiKayesLoudimaDolisieBelize

Topography around Mouyondzi

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

Within 3 km, the terrain around Mouyondzi has only modest variations in elevation — a maximum elevation change of 153 m around an average of 464 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 404 m; within 80 km, large variations in elevation — a maximum elevation change of 709 m.

The land around Mouyondzi is covered by grassland (59%) and trees (31%) within 3 km, grassland (62%) and trees (33%) within 16 km, and grassland (51%) and trees (45%) within 80 km.

3 km
153 m
16 km
404 m
80 km
709 m
treesshrubsgrasslandartificial surfaces
September weather nearby: Bouansa 31 km · Loutété 35 km · Sibiti 73 km · Nkayi 74 km · Kayes 75 km · Loudima 96 km · Dolisie 142 km · Belize 148 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
Roman Catholic 33%Awakening Churches/Christian Revival 22%Protestant 20%none 11%

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 Mouyondzi (-3.9944°, 13.9272°, elevation 510 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).