Mandiana weather in September

In September, Mandiana sees average daytime highs of 30°C and overnight lows near 22°C, with 245 mm of rain across 25.6 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 2nd-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 10% 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 Mandiana's 10th-clearest and 11th-windiest month. For the whole year in context, see Mandiana's year-round climate.

Daytime high
30°
10th warmest
Overnight low
22°
6th coldest
Rainfall
245 mm
25.6 wet days
Daylight
12 h 06 min
6:27 AM – 6:31 PM
Cloud cover
72%
10th clearest
Wind
6 km/h
11th windiest
Solar energy
4.99 kWh/m²
Travel score
3.1
out of 10

Mandiana is human settlement in Guinea.

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 30°C through the month.

A typical September day in Mandiana reaches about 30°C in the afternoon and slips back to 22°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 about 1°C warmer than August and about 2°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12922
22922
32922
42922
52922
62922
72922
82922
92922
103022
113022
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273122
283122
293122
303122

How September really feels in Mandiana

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.

Mandiana 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 19°20.511.44.8
Feb35° / 21°20.511.63.2
Mar37° / 24°82.311.91.9
Apr37° / 25°408.712.21.7
May34° / 24°10115.912.52.3
Jun31° / 23°16221.512.63.1
Jul29° / 22°23925.312.63.3
Aug29° / 22°27026.712.43.3
Sep30° / 22°24525.612.13.1
Oct31° / 21°1301911.83.5
Nov33° / 20°152.811.54.3
Dec33° / 18°00.111.44.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 71%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11684
21684
31783
41783
51981
61981
72080
82179
92278
102476
112476
122476
132674
142872
152971
163070
173169
183169
193466
203466
213565
223565
233763
243763
253862
263862
273961
283961
294159
304159

Chance of precipitation in September

Any precipitation

Mandiana gets around 245 mm of rain over 25.6 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 85% and peaks near 87% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
186
286
386
486
586
687
787
887
987
1087
1187
1287
1387
1487
1587
1687
1787
1886
1986
2086
2185
2285
2384
2483
2582
2682
2781
2880
2979
3078

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 99% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
12980
22980
32980
42980
52980
61990
71990
81990
91990
101990
111990
121990
131990
141990
150991
160991
170991
180991
190991
200991
210991
220991
230991
240991
250991
260991
270991
280991
290991
301981

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 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
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 6:28 AM to 6:27 AM, and sunset from 6:41 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:286:41
212.26:286:40
312.26:286:39
412.26:286:39
512.26:286:38
612.26:286:37
712.16:286:37
812.16:286:36
912.16:286:36
1012.16:286:35
1112.16:286:34
1212.16:286:34
1312.16:286:33
1412.16:286:32
1512.16:276:32
1612.16:276:31
1712.06:276:30
1812.06:276:29
1912.06:276:29
2012.06:276:28
2112.06:276:27
2212.06:276:27
2312.06:276:26
2412.06:276:25
2512.06:276:25
2612.06:276:24
2711.96:276:24
2811.96:276:23
2911.96:276:22
3011.96:276:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.99 kWh/m².

For context, solar energy here swings from a low near 4.34 kWh/m² to a high of 6.56 kWh/m² in March across the year — September's 4.99 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.6Bright
44.6Bright
54.6Bright
64.7Bright
74.7Bright
84.8Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
134.9Bright
145.0Bright
155.0Bright
165.0Bright
175.1Bright
185.1Bright
195.1Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.4Bright
Planning a trip in September

Hazard calendar for Mandiana

In seasonPeak

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

Mandiana's monsoon runs June–October, when most of the year's rain falls.

Mandiana sees seasonal dust haze (February–June), heaviest in April.

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

Is September a good time to visit Mandiana?

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

3.1
Sightseeing
8th-best month of the year
4.3
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Mandiana.

What to pack for Mandiana in September

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

In September, Mandiana sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Mandiana 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 Mandiana peaks around March 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 highMar 16UV 13Dec 16UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr12Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct12Extreme
Nov9Very high
Dec7Very high

Air quality in Mandiana 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 Mandiana is worst in March — around 71 µg/m³ PM2.5 (unhealthy), about 7.6× the cleanest month (August, 9 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModerateGoodModeratePoorMar 1170 µg/m³Aug 1610 µg/m³
PM2.5 (µg/m³)Level
Jan55Poor
Feb67Unhealthy
Mar71Unhealthy
Apr50Poor
May24Moderate
Jun20Moderate
Jul13Moderate
Aug9Good
Sep14Moderate
Oct23Moderate
Nov27Moderate
Dec42Poor
Location & terrain

Where is Mandiana?

Mandiana sits at 10.6°N, 8.7°W, 373 m above sea level, in Guinea. The nearest listed city is Kankan, 72 km away.

KankanYanfolilaSiguiriKouroussaKintinianKangabaKérouanéBougouni

Topography around Mandiana

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

Within 3 km, the terrain around Mandiana has only modest variations in elevation — a maximum elevation change of 78 m around an average of 383 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 130 m; within 80 km, only modest variations in elevation — a maximum elevation change of 230 m.

The land around Mandiana is covered by grassland (43%) within 3 km, grassland (52%) and shrubs (22%) within 16 km, and grassland (37%), trees (28%) and shrubs (26%) within 80 km.

3 km
78 m
16 km
130 m
80 km
230 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kankan 72 km · Yanfolila 86 km · Siguiri 103 km · Kouroussa 130 km · Kintinian 132 km · Kangaba 149 km · Kérouané 155 km · Bougouni 159 km

Guinea travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / K
220 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$1,877
2025
Happiness
4.6 / 10
World Happiness, 2025
Road deaths
29.7
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Muslim 85%Christian 13%none 1%animist 0%

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 Mandiana (10.6258°, -8.6941°, elevation 373 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).