Bonny weather in September

In September, Bonny sees average daytime highs of 27°C and overnight lows near 24°C, with 356 mm of rain across 29.1 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 27°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 Bonny's 12th-clearest and 6th-windiest month. For the whole year in context, see Bonny's year-round climate.

Daytime high
27°
10th warmest
Overnight low
24°
3rd coldest
Rainfall
356 mm
29.1 wet days
Daylight
12 hours
6:25 AM – 6:26 PM
Cloud cover
88%
12th clearest
Wind
11 km/h
6th windiest
Solar energy
3.81 kWh/m²
Travel score
3.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Bonny reaches about 27°C in the afternoon and slips back to 24°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12724
22724
32724
42724
52724
62724
72724
82724
92724
102724
112724
122724
132724
142724
152724
162724
172724
182724
192724
202724
212724
222724
232724
242724
252724
262724
272724
282724
292724
302724

How September really feels in Bonny

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Bonny 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
Jan29° / 25°4713.411.84.9
Feb30° / 26°7316.711.94.1
Mar29° / 26°16424.6123.4
Apr29° / 26°22525.512.13.2
May29° / 25°29528.712.23.1
Jun27° / 25°41428.812.33.4
Jul27° / 24°41829.212.23.6
Aug26° / 24°3392812.13.7
Sep27° / 24°35629.1123.4
Oct28° / 24°3133011.93.3
Nov28° / 25°17425.911.83.5
Dec29° / 25°5616.211.74.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 5% of September, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1397
2397
3397
4397
5496
6496
7496
8496
9496
10496
11496
12496
13496
14496
15496
16595
17595
18595
19595
20595
21595
22595
23595
24694
25694
26694
27694
28694
29694
30694

Chance of precipitation in September

Any precipitation

Bonny gets around 356 mm of rain over 29.1 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 97% and peaks near 98% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
196
296
397
497
597
697
797
897
998
1098
1198
1298
1398
1497
1597
1697
1797
1897
1997
2097
2197
2297
2397
2496
2596
2696
2796
2896
2997
3097

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
Oppressive (%)Miserable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
12991
13991
14991
15991
16991
17991
18991
19982
20982
21982
22982
23982
24982
25973
26973
27973
28973
29973
30964

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212calm
312calm
412calm
512calm
612calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 6:28 AM to 6:22 AM, and sunset from 6:34 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:286:34
212.16:286:33
312.16:286:33
412.16:286:32
512.16:286:32
612.16:276:31
712.16:276:31
812.16:276:30
912.16:276:30
1012.06:266:29
1112.06:266:29
1212.06:266:28
1312.06:266:28
1412.06:256:27
1512.06:256:27
1612.06:256:26
1712.06:256:26
1812.06:246:25
1912.06:246:25
2012.06:246:24
2112.06:246:24
2212.06:236:23
2312.06:236:23
2412.06:236:22
2512.06:236:22
2612.06:236:21
2712.06:226:21
2812.06:226:21
2912.06:226:20
3012.06:226:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.81 kWh/m².

For context, solar energy here swings from a low near 3.39 kWh/m² to a high of 5.17 kWh/m² in January across the year — September's 3.81 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.7Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.8Moderate
133.8Moderate
143.8Moderate
153.8Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Bonny

In seasonPeak

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

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

Bonny 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 Bonny?

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
3.4
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Bonny.

What to pack for Bonny in September

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

In September, Bonny sees daytime highs around 27°C and nights near 24°C. Pack rain gear. Worth having: light clothes. About 29 days see rain.

rain gearlight clothes

Sea temperature near Bonny in September

The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in March at about 29°C and coldest in August near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul27Warm
Aug26Warm
Sep27Warm
Oct27Warm
Nov28Tropical
Dec28Tropical

UV index in Bonny 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 Bonny peaks around April 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 12UV 13Jan 10UV 9
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec9Very high

Air quality in Bonny 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 Bonny is worst in January — around 104 µg/m³ PM2.5 (unhealthy), about 2.8× the cleanest month (August, 37 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyJan 17102 µg/m³Aug 1537 µg/m³
PM2.5 (µg/m³)Level
Jan104Unhealthy
Feb95Unhealthy
Mar68Unhealthy
Apr60Unhealthy
May53Poor
Jun47Poor
Jul41Poor
Aug37Poor
Sep43Poor
Oct55Poor
Nov62Unhealthy
Dec92Unhealthy
Location & terrain

Where is Bonny?

Bonny sits at 4.5°N, 7.2°E, 7 m above sea level, in Nigeria. The nearest listed city is Okrika, 34 km away.

AbaEleleEket

Topography around Bonny

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

Within 3 km, the terrain around Bonny has only modest variations in elevation — a maximum elevation change of 17 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 24 m; within 80 km, only modest variations in elevation — a maximum elevation change of 78 m.

The land around Bonny is covered by water (48%) and mangroves (28%) within 3 km, water (51%) and mangroves (36%) within 16 km, and water (38%), trees (31%) and mangroves (20%) within 80 km.

3 km
17 m
16 km
24 m
80 km
78 m
treesgrasslandartificial surfaceswatermangroves
September weather nearby: Okrika 34 km · Port Harcourt 40 km · Buguma 47 km · Obonoma 51 km · Degema Hulk 58 km · Aba 76 km · Elele 82 km · Eket 86 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 Bonny (4.4516°, 7.1707°, elevation 7 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. 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).