Sinchu Alagi weather in September

In September, Sinchu Alagi sees average daytime highs of 29°C and overnight lows near 26°C, with 196 mm of rain across 19.5 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 2nd-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 12% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Sinchu Alagi's 11th-clearest and 11th-windiest month. For the whole year in context, see Sinchu Alagi's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
26°
11th coldest
Rainfall
196 mm
19.5 wet days
Daylight
12 h 06 min
6:59 AM – 7:03 PM
Cloud cover
73%
11th clearest
Wind
12 km/h
11th windiest
Solar energy
5.18 kWh/m²
Travel score
4.2
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 Sinchu Alagi reaches about 29°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72926
82926
92926
102926
112926
122926
132926
142926
152926
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282927
292927
302927

How September really feels in Sinchu Alagi

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.

Sinchu Alagi weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 21°10.211.38.6
Feb26° / 21°10.111.68.7
Mar26° / 21°00.111.99.0
Apr25° / 22°0012.39.0
May26° / 23°10.212.68.8
Jun27° / 25°132.212.87.6
Jul28° / 26°15315.512.75.0
Aug28° / 26°27923.412.43.9
Sep29° / 26°19619.512.14.2
Oct30° / 27°558.411.75.5
Nov29° / 26°20.411.46.6
Dec27° / 23°10.111.28.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% 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 69%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11981
22080
32080
42179
52278
62278
72476
82476
92674
102674
112773
122872
132971
142971
153169
163169
173169
183367
193466
203466
213565
223664
233763
243862
254060
264159
274258
284357
294456
304654

Chance of precipitation in September

Any precipitation

Sinchu Alagi gets around 196 mm of rain over 19.5 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 64% and peaks near 76% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
176
276
375
475
574
673
772
871
970
1069
1169
1268
1367
1466
1566
1665
1764
1863
1962
2061
2160
2259
2358
2457
2555
2654
2753
2851
2950
3048

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
12377
22377
32377
42377
52278
62278
72278
82179
92179
102080
111981
121981
131882
141882
151783
161684
171684
181585
191486
201486
211387
221387
231288
241288
251189
261189
271189
281090
291090
301090

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1112light breeze
1212light breeze
1312light breeze
1412calm
1512calm
1612calm
1712calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 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 24 minutes over September. Sunrise moves from 6:59 AM to 6:59 AM, and sunset from 7:14 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:597:14
212.26:597:14
312.26:597:13
412.26:597:12
512.26:597:11
612.26:597:11
712.26:597:10
812.26:597:09
912.26:597:08
1012.16:597:08
1112.16:597:07
1212.16:597:06
1312.16:597:06
1412.16:597:05
1512.16:597:04
1612.16:597:03
1712.16:597:02
1812.06:597:02
1912.06:597:01
2012.06:597:00
2112.06:596:59
2212.06:596:59
2312.06:596:58
2412.06:596:57
2512.06:596:56
2611.96:596:56
2711.96:596:55
2811.96:596:54
2911.96:596:54
3011.96:596:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.18 kWh/m².

For context, solar energy here swings from a low near 4.88 kWh/m² to a high of 7.14 kWh/m² in April across the year — September's 5.18 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.1Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Sinchu Alagi

In seasonPeak

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

Sinchu Alagi sits in the Atlantic hurricane belt; the season peaks August–October.

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

Sinchu Alagi sees seasonal dust haze (February–August), heaviest in June.

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

Is September a good time to visit Sinchu Alagi?

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

4.2
Sightseeing
11th-best month of the year
5.3
Beach & pool
11th-best month of the year

September is a reasonable time to visit Sinchu Alagi for sightseeing.

What to pack for Sinchu Alagi in September

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

In September, Sinchu Alagi sees daytime highs around 29°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

Sea temperature near Sinchu Alagi in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in October at about 29°C and coldest in March near 20°C.

It's comfortable for a long swim from Mar 24 to Mar 8 — about 11.5 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb20Refreshing
Mar20Cool
Apr20Refreshing
May23Refreshing
Jun26Warm
Jul28Warm
Aug28Tropical
Sep28Tropical
Oct29Tropical
Nov28Warm
Dec24Warm

UV index in Sinchu Alagi 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 Sinchu Alagi peaks around March 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highMar 19UV 13Dec 19UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May11Extreme
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Sinchu Alagi 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 Sinchu Alagi is worst in February — around 98 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (August, 24 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyFeb 1397 µg/m³Aug 2024 µg/m³
PM2.5 (µg/m³)Level
Jan89Unhealthy
Feb98Unhealthy
Mar80Unhealthy
Apr61Unhealthy
May52Poor
Jun60Unhealthy
Jul36Poor
Aug24Moderate
Sep29Moderate
Oct50Poor
Nov64Unhealthy
Dec84Unhealthy
Location & terrain

Where is Sinchu Alagi?

Sinchu Alagi sits at 13.4°N, 16.7°W, 40 m above sea level, in Gambia. The nearest listed city is Kunkujang, 2.0 km away.

Topography around Sinchu Alagi

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

Within 3 km, the terrain around Sinchu Alagi has only modest variations in elevation — a maximum elevation change of 20 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 40 m; within 80 km, only modest variations in elevation — a maximum elevation change of 53 m.

The land around Sinchu Alagi is covered by artificial surfaces (61%) within 3 km, water (36%) within 16 km, and water (41%) within 80 km.

3 km
20 m
16 km
40 m
80 km
53 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Kunkujang 2.0 km · Welingara 3.0 km · Abuko 4.0 km · Busumbala 4.0 km · Latri Sabiji 4.0 km · Faji Kunda 5.0 km · Sukuta 5.0 km · Talinding 6.0 km

Gambia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type G
230 V · 50 Hz
Prices
≈ 25% of US
price level, 2025
GDP per capita
$919
2025
Happiness
4.3 / 10
World Happiness, 2025
Safe drinking water
48%
of population, 2024
Road deaths
29.6
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Muslim 96%Christian 4%other or none 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 Sinchu Alagi (13.3749°, -16.6784°, elevation 40 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).