Iseyin weather in September

In September, Iseyin sees average daytime highs of 29°C and overnight lows near 22°C, with 167 mm of rain across 23.7 wet days and about 12 hours of daylight. It is the 10th-warmest and 3rd-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 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 Iseyin's 10th-clearest and 9th-windiest month. For the whole year in context, see Iseyin's year-round climate.

Daytime high
29°
10th warmest
Overnight low
22°
5th coldest
Rainfall
167 mm
23.7 wet days
Daylight
12 hours
6:39 AM – 6:41 PM
Cloud cover
83%
10th clearest
Wind
6 km/h
9th windiest
Solar energy
4.03 kWh/m²
Travel score
3.4
out of 10

Iseyin is LGA and town in Oyo State, Nigeria.

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 Iseyin reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°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 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
102922
112922
122922
132922
142922
152922
162922
172922
182922
192922
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022

How September really feels in Iseyin

Once humidity and wind are folded in, September averages 26 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
26
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.

Iseyin weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 22°71.711.63.9
Feb35° / 23°163.611.73.0
Mar35° / 24°471011.92.6
Apr33° / 24°7913.812.22.8
May32° / 24°12319.312.43.0
Jun30° / 23°1552312.53.3
Jul29° / 22°17024.612.43.6
Aug28° / 22°17423.812.33.8
Sep29° / 22°16723.7123.4
Oct31° / 23°10217.911.83.6
Nov33° / 23°153.611.64.0
Dec33° / 22°4111.54.2

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 8% of September, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1595
2595
3595
4694
5694
6793
7793
8793
9892
10892
11991
12991
13991
14991
151090
161090
171090
181090
191090
201090
21991
22991
23991
24991
25991
26991
27991
28991
29991
301090

Chance of precipitation in September

Any precipitation

Iseyin gets around 167 mm of rain over 23.7 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 79% and peaks near 86% 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
585
684
784
883
982
1081
1181
1280
1379
1479
1578
1678
1777
1877
1976
2076
2175
2275
2375
2474
2574
2674
2773
2873
2973
3072

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 (%)
1694
2595
3595
4595
5496
6496
7496
8397
9397
10397
11397
12298
13298
14298
15298
16298
17298
18298
19298
20298
21199
22199
23199
24199
25199
26199
27199
28199
29199
30199

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
76calm
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 6:41 AM to 6:37 AM, and sunset from 6:50 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:416:50
212.16:416:49
312.16:406:49
412.16:406:48
512.16:406:48
612.16:406:47
712.16:406:47
812.16:406:46
912.16:406:45
1012.16:406:45
1112.16:396:44
1212.16:396:44
1312.16:396:43
1412.16:396:42
1512.16:396:42
1612.06:396:41
1712.06:386:41
1812.06:386:40
1912.06:386:39
2012.06:386:39
2112.06:386:38
2212.06:386:38
2312.06:386:37
2412.06:386:36
2512.06:376:36
2612.06:376:35
2712.06:376:35
2812.06:376:34
2911.96:376:34
3011.96:376:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.03 kWh/m².

For context, solar energy here swings from a low near 3.7 kWh/m² to a high of 5.86 kWh/m² in February across the year — September's 4.03 kWh/m² sits near the bottom.

012345151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
104.0Moderate
114.0Moderate
124.0Moderate
134.0Moderate
144.0Bright
154.0Bright
164.0Bright
174.0Bright
184.1Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for Iseyin

In seasonPeak

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

Iseyin's rainy season runs April–October, when most of the year's rain falls.

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

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

Is September a good time to visit Iseyin?

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

3.4
Sightseeing
7th-best month of the year
4.5
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Iseyin.

What to pack for Iseyin in September

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

In September, Iseyin sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 24 days see rain.

light clothesrain gear

UV index in Iseyin 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 Iseyin peaks around April 9 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highApr 9UV 12Dec 20UV 7
UV index (midday)Level
Jan8Very high
Feb8Very high
Mar12Extreme
Apr12Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec7Very high

Air quality in Iseyin 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 Iseyin is worst in January — around 117 µg/m³ PM2.5 (unhealthy), about 4.0× the cleanest month (July, 30 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 23117 µg/m³Jul 2130 µg/m³
PM2.5 (µg/m³)Level
Jan117Unhealthy
Feb116Unhealthy
Mar63Unhealthy
Apr55Poor
May39Poor
Jun33Moderate
Jul30Moderate
Aug31Moderate
Sep37Poor
Oct54Poor
Nov71Unhealthy
Dec102Unhealthy
Location & terrain

Where is Iseyin?

Iseyin sits at 8.0°N, 3.6°E, 313 m above sea level, in Nigeria. The nearest listed city is Oyo, 39 km away.

Ibadan

Topography around Iseyin

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

Within 3 km, the terrain around Iseyin has only modest variations in elevation — a maximum elevation change of 153 m around an average of 311 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 251 m; within 80 km, significant variations in elevation — a maximum elevation change of 564 m.

The land around Iseyin is covered by artificial surfaces (53%) and trees (22%) within 3 km, shrubs (32%), cropland (31%) and trees (20%) within 16 km, and trees (45%), shrubs (22%) and cropland (20%) within 80 km.

3 km
153 m
16 km
251 m
80 km
564 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Oyo 39 km · Fiditi 45 km · Orita-Eruwa 49 km · Eruwa 52 km · Igangan 56 km · Igbo-Ora 69 km · Ogbomoso 73 km · Ibadan 74 km

Nigeria travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type D / G
230 V · 50 Hz
Prices
≈ 13% of US
price level, 2025
GDP per capita
$1,224
2025
Happiness
4.8 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
15.7
per 100k, 2023
Road deaths
20.7
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
High
EF EPI 569
Religion
Muslim 54%other Christian 35%Roman Catholic 11%other 1%

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 Iseyin (7.9702°, 3.5963°, elevation 313 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).