Mongo weather in September

In September, Mongo sees average daytime highs of 32°C and overnight lows near 23°C, with 140 mm of rain across 18.3 wet days and about 12.1 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 31°C in the first days to 33°C by the end. The sky is clear or mostly clear about 21% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Mongo's 10th-clearest and 12th-windiest month. For the whole year in context, see Mongo's year-round climate.

Daytime high
32°
11th warmest
Overnight low
23°
8th coldest
Rainfall
140 mm
18.3 wet days
Daylight
12 h 06 min
5:38 AM – 5:42 PM
Cloud cover
63%
10th clearest
Wind
7 km/h
12th windiest
Solar energy
5.82 kWh/m²
Travel score
3.2
out of 10

Mongo is city in Chad.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 31°C in the first days to 33°C by the end.

A typical September day in Mongo reaches about 32°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, September runs about 2°C warmer than August and about 3°C cooler than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123223
133223
143223
153223
163223
173223
183223
193223
203223
213223
223323
233323
243323
253323
263323
273323
283323
293323
303323

How September really feels in Mongo

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
30
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.

Mongo weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 16°0011.44.8
Feb35° / 18°0011.63.0
Mar38° / 22°00.111.91.1
Apr40° / 25°62.312.30.2
May39° / 27°308.312.60.7
Jun36° / 26°621312.71.8
Jul32° / 24°17623.312.62.7
Aug30° / 23°28926.912.43.0
Sep32° / 23°14018.312.13.2
Oct35° / 23°255.411.73.0
Nov35° / 20°10.211.43.1
Dec33° / 17°0011.34.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22674
32773
42872
52872
63070
73169
83169
93466
103565
113664
123862
134060
144258
154357
164654
174654
184852
194951
205149
215248
225347
235545
245644
255743
265941
276040
286139
296139
306337

Chance of precipitation in September

Any precipitation

Mongo gets around 140 mm of rain over 18.3 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 81% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
181
280
380
478
577
676
775
873
971
1070
1168
1266
1365
1463
1561
1659
1757
1856
1954
2052
2151
2250
2349
2447
2546
2645
2744
2843
2942
3041

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 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
100199
200199
300199
400199
500199
600199
700199
800199
900199
1000199
1100199
1200298
1300298
1400298
1500397
1600397
1700397
1800496
1900496
2000595
2100694
2200793
2300793
2400892
2500991
26111088
27111286
28111385
29111583
30121780

Wind in September

Winds average 7 km/h in September, the calmest month.

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

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
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 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over September. Sunrise moves from 5:38 AM to 5:37 AM, and sunset from 5:52 PM to 5:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:385:52
212.25:385:51
312.25:385:51
412.25:385:50
512.25:385:49
612.25:385:49
712.25:385:48
812.25:385:47
912.15:385:47
1012.15:385:46
1112.15:385:45
1212.15:385:44
1312.15:385:44
1412.15:385:43
1512.15:385:42
1612.15:385:42
1712.15:385:41
1812.05:385:40
1912.05:375:39
2012.05:375:39
2112.05:375:38
2212.05:375:37
2312.05:375:37
2412.05:375:36
2512.05:375:35
2612.05:375:34
2711.95:375:34
2811.95:375:33
2911.95:375:32
3011.95:375:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.82 kWh/m².

For context, solar energy here swings from a low near 5.11 kWh/m² to a high of 7.1 kWh/m² in March across the year — September's 5.82 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.6Bright
75.6Bright
85.6Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.8Bright
145.8Bright
155.8Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
206.0Bright
216.0Bright
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Mongo

In seasonPeak

In September, Mongo sits inside its monsoon and dust season. The full year is below, with each hazard's peak months called out.

Mongo's monsoon runs July–September, when most of the year's rain falls.

Mongo sees seasonal dust haze (March–July), heaviest in March.

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

Is September a good time to visit Mongo?

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

3.2
Sightseeing
3rd-best month of the year
5.2
Beach & pool
6th-best month of the year

September is a weaker month for outdoor sightseeing in Mongo.

What to pack for Mongo in September

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

In September, Mongo sees daytime highs around 32°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

UV index in Mongo 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 Mongo peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 12UV 13Dec 15UV 8
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar12Extreme
Apr12Extreme
May10Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Mongo 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 Mongo is worst in March — around 66 µg/m³ PM2.5 (unhealthy), about 3.5× the cleanest month (August, 19 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModerateMar 1663 µg/m³Aug 1519 µg/m³
PM2.5 (µg/m³)Level
Jan35Poor
Feb44Poor
Mar66Unhealthy
Apr43Poor
May25Moderate
Jun25Moderate
Jul20Moderate
Aug19Moderate
Sep21Moderate
Oct28Moderate
Nov23Moderate
Dec27Moderate
Location & terrain

Where is Mongo?

Mongo sits at 12.2°N, 18.7°E, 429 m above sea level, in Chad. The nearest listed city is Bitkine, 56 km away.

MangalméAtiUmm HājarBokoroAm TimanBoussoMoussoro

Topography around Mongo

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

Within 3 km, the terrain around Mongo has significant variations in elevation — a maximum elevation change of 361 m around an average of 451 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 828 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,219 m.

The land around Mongo is covered by grassland (63%) within 3 km, grassland (81%) within 16 km, and grassland (65%) and shrubs (31%) within 80 km.

3 km
361 m
16 km
828 m
80 km
1,219 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Bitkine 56 km · Mangalmé 102 km · Ati 120 km · Umm Hājar 165 km · Bokoro 178 km · Am Timan 215 km · Bousso 287 km · Moussoro 288 km

Chad travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / D / E / F
220 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$1,022
2025
Happiness
4.4 / 10
World Happiness, 2025
Safe drinking water
6%
of population, 2024
Road deaths
32.4
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Muslim 52%Protestant 24%Roman Catholic 20%none 3%

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 Mongo (12.1851°, 18.6884°, elevation 429 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).