Assin Foso weather in September

In September, Assin Foso sees average daytime highs of 29°C and overnight lows near 23°C, with 134 mm of rain across 25.1 wet days and about 12 hours of daylight. It is the 10th-warmest and 4th-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 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Assin Foso's 8th-clearest and 4th-windiest month. For the whole year in context, see Assin Foso's year-round climate.

Daytime high
29°
10th warmest
Overnight low
23°
8th coldest
Rainfall
134 mm
25.1 wet days
Daylight
12 hours
6:00 AM – 6:02 PM
Cloud cover
80%
8th clearest
Wind
7 km/h
4th windiest
Solar energy
3.98 kWh/m²
Travel score
3.4
out of 10

Assin Foso is town and Municipal Capital in Central Region, Ghana.

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 Assin Foso reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 31°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)
12923
22923
32923
42923
52923
62923
72923
82923
92923
102923
112923
122923
132923
142923
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
283023
293023
303023

How September really feels in Assin Foso

Once humidity and wind are folded in, September averages 24 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
24
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.

Assin Foso weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°317.911.74.2
Feb33° / 24°531211.83.2
Mar33° / 24°10820.6122.7
Apr32° / 24°11221.712.12.8
May31° / 23°15926.312.32.8
Jun29° / 23°17326.512.33.2
Jul28° / 22°11922.612.33.9
Aug28° / 22°8820.312.24.2
Sep29° / 23°13425.1123.4
Oct30° / 23°15226.411.93.1
Nov31° / 23°8518.811.73.5
Dec31° / 23°389.811.74.5

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 9% of September, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1694
2694
3793
4793
5793
6793
7793
8793
9793
10892
11892
12892
13892
14892
15991
16991
17991
18991
19991
20991
211090
221090
231189
241189
251288
261486
271486
281585
291585
301684

Chance of precipitation in September

Any precipitation

Assin Foso gets around 134 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 83% and peaks near 89% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
180
281
381
481
582
682
782
882
981
1081
1181
1281
1381
1481
1582
1682
1782
1883
1983
2084
2184
2285
2386
2486
2587
2688
2788
2888
2989
3089

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.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
13970
23970
33970
43970
52980
62980
72980
82980
92980
102980
112980
122980
132980
142980
152980
162980
172980
182980
192980
201990
211990
221990
231990
241990
251990
2601000
2701000
280991
290991
300991

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
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 06 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over September. Sunrise moves from 6:03 AM to 5:57 AM, and sunset from 6:10 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:036:10
212.16:036:09
312.16:036:09
412.16:026:08
512.16:026:08
612.16:026:07
712.16:026:07
812.16:026:06
912.16:016:06
1012.16:016:05
1112.16:016:05
1212.16:016:04
1312.06:016:03
1412.06:006:03
1512.06:006:02
1612.06:006:02
1712.06:006:01
1812.06:006:01
1912.05:596:00
2012.05:596:00
2112.05:595:59
2212.05:595:59
2312.05:595:58
2412.05:585:58
2512.05:585:57
2612.05:585:57
2712.05:585:56
2812.05:585:56
2912.05:575:55
3012.05:575:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.98 kWh/m².

For context, solar energy here swings from a low near 3.7 kWh/m² to a high of 5.06 kWh/m² in March across the year — September's 3.98 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
134.0Moderate
144.0Moderate
154.0Moderate
164.0Moderate
174.0Moderate
184.0Bright
194.0Bright
204.0Bright
214.0Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for Assin Foso

In seasonPeak

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

Assin Foso sees seasonal dust haze (January–April), heaviest in February.

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

Is September a good time to visit Assin Foso?

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

3.4
Sightseeing
6th-best month of the year
4.3
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Assin Foso.

What to pack for Assin Foso in September

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

In September, Assin Foso sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 25 days see rain.

light clothesrain gear

UV index in Assin Foso in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Assin Foso peaks around March 24 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 24UV 13Dec 15UV 9
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul10Extreme
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec9Very high

Air quality in Assin Foso 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 Assin Foso is worst in January — around 79 µg/m³ PM2.5 (unhealthy), about 4.4× the cleanest month (August, 18 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModerateUnhealthyJan 1878 µg/m³Aug 2318 µg/m³
PM2.5 (µg/m³)Level
Jan79Unhealthy
Feb72Unhealthy
Mar42Poor
Apr39Poor
May24Moderate
Jun22Moderate
Jul20Moderate
Aug18Moderate
Sep18Moderate
Oct24Moderate
Nov34Moderate
Dec67Unhealthy
Location & terrain

Where is Assin Foso?

Assin Foso sits at 5.7°N, 1.6°W, 107 m above sea level, in Ghana. The nearest listed city is Twifu Praso, 15 km away.

FosoObuasiTarkwaPresteaShama JunctionElmina

Topography around Assin Foso

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

Within 3 km, the terrain around Assin Foso has only modest variations in elevation — a maximum elevation change of 78 m around an average of 99 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 307 m; within 80 km, large variations in elevation — a maximum elevation change of 783 m.

The land around Assin Foso is covered by trees (88%) within 3 km, trees (95%) within 16 km, and trees (95%) within 80 km.

3 km
78 m
16 km
307 m
80 km
783 m
treesshrubsgrasslandartificial surfaceswater
September weather nearby: Twifu Praso 15 km · Dunkwa 32 km · Foso 40 km · Obuasi 56 km · Tarkwa 58 km · Prestea 62 km · Shama Junction 76 km · Elmina 76 km

Ghana travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G
230 V · 50 Hz
Prices
≈ 38% of US
price level, 2025
GDP per capita
$3,257
2025
Happiness
4.6 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
1.8
per 100k, 2022
Road deaths
25.7
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Moderate
EF EPI 540
Religion
Christian 71%Muslim 20%other 5%traditionalist 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 Assin Foso (5.7°, -1.65°, elevation 107 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).