Biu weather in September

In September, Biu sees average daytime highs of 29°C and overnight lows near 22°C, with 116 mm of rain across 20.2 wet days and about 12.1 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 30°C by the end. The sky is clear or mostly clear about 8% 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 Biu's 10th-clearest and 11th-windiest month. For the whole year in context, see Biu's year-round climate.

Daytime high
29°
11th warmest
Overnight low
22°
6th coldest
Rainfall
116 mm
20.2 wet days
Daylight
12 h 06 min
6:04 AM – 6:07 PM
Cloud cover
74%
10th clearest
Wind
7 km/h
11th windiest
Solar energy
5.34 kWh/m²
Travel score
3.9
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 30°C by the end.

A typical September day in Biu reaches about 29°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 27°C and 31°C. Set against its neighbours, September runs about 1°C warmer than August and about 3°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12821
22821
32822
42822
52922
62922
72922
82922
92922
102922
112922
122922
132922
142922
152922
162922
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293122
303122

How September really feels in Biu

Once humidity and wind are folded in, September averages 19 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
19
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.

Biu weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 17°0011.45.4
Feb35° / 20°0011.63.4
Mar38° / 23°10.311.91.4
Apr38° / 26°175.112.21.1
May35° / 25°5912.512.52.1
Jun32° / 24°7715.112.63.4
Jul29° / 22°11719.912.63.9
Aug28° / 22°18323.812.34.0
Sep29° / 22°11620.212.13.9
Oct32° / 22°6113.311.83.6
Nov34° / 20°10.311.54.1
Dec32° / 17°0011.45.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% 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 73%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11387
21387
31585
41585
51684
61882
71882
81981
92080
102179
112278
122377
132476
142575
152674
162773
172872
182971
193169
203169
213367
223367
233565
243664
253763
263862
273961
283961
294159
304159

Chance of precipitation in September

Any precipitation

Biu gets around 116 mm of rain over 20.2 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 68% and peaks near 71% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
171
271
370
469
568
668
767
867
967
1067
1167
1267
1367
1467
1568
1668
1768
1868
1969
2069
2168
2268
2368
2468
2568
2667
2767
2867
2967
3066

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 85% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Comfortable (%)Muggy (%)Oppressive (%)
102080
201981
301981
401981
501882
601783
701783
801684
901684
1001585
1101585
1201486
1301486
1401486
1501387
1601387
1701288
1801288
1901288
2001288
2101288
2201288
2301288
2401288
2501387
2601387
2701387
2801486
2911485
3011485

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.

051015151015202530
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 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 6:05 AM to 6:03 AM, and sunset from 6:17 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:056:17
212.26:056:16
312.26:056:16
412.26:056:15
512.26:056:15
612.26:046:14
712.16:046:13
812.16:046:13
912.16:046:12
1012.16:046:11
1112.16:046:11
1212.16:046:10
1312.16:046:09
1412.16:046:09
1512.16:046:08
1612.16:046:07
1712.06:046:07
1812.06:046:06
1912.06:046:05
2012.06:046:05
2112.06:036:04
2212.06:036:03
2312.06:036:03
2412.06:036:02
2512.06:036:01
2612.06:036:01
2711.96:036:00
2811.96:035:59
2911.96:035:59
3011.96:035:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.34 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 7.08 kWh/m² in March across the year — September's 5.34 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.9Bright
54.9Bright
65.0Bright
75.0Bright
85.0Bright
95.1Bright
105.1Bright
115.2Bright
125.2Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.6Bright
235.6Bright
245.6Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Biu

In seasonPeak

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

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

Biu sees seasonal dust haze (January–June), heaviest in March.

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

Is September a good time to visit Biu?

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

3.9
Sightseeing
5th-best month of the year
5.0
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Biu.

What to pack for Biu in September

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

In September, Biu sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Biu 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 Biu peaks around August 18 at about 12 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highExtremeVery highAug 18UV 12Dec 16UV 8
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar11Extreme
Apr11Extreme
May10Very high
Jun10Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Biu 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 Biu is worst in February — around 96 µg/m³ PM2.5 (unhealthy), about 4.3× the cleanest month (July, 22 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyFeb 2296 µg/m³Jul 2123 µg/m³
PM2.5 (µg/m³)Level
Jan87Unhealthy
Feb96Unhealthy
Mar96Unhealthy
Apr68Unhealthy
May38Poor
Jun31Moderate
Jul22Moderate
Aug25Moderate
Sep31Moderate
Oct49Poor
Nov57Unhealthy
Dec79Unhealthy
Location & terrain

Where is Biu?

Biu sits at 10.6°N, 12.2°E, 762 m above sea level, in Nigeria. The nearest listed city is Gombi, 77 km away.

GombiDamboaDebaNafadaGombeGarkoMubiKumo

Topography around Biu

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

Within 3 km, the terrain around Biu has only modest variations in elevation — a maximum elevation change of 131 m around an average of 743 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 450 m; within 80 km, large variations in elevation — a maximum elevation change of 756 m.

The land around Biu is covered by cropland (35%), artificial surfaces (33%) and grassland (26%) within 3 km, cropland (51%) and grassland (42%) within 16 km, and cropland (43%) and grassland (38%) within 80 km.

3 km
131 m
16 km
450 m
80 km
756 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Gombi 77 km · Damboa 86 km · Deba 99 km · Nafada 108 km · Gombe 118 km · Garko 123 km · Mubi 123 km · Kumo 125 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 Biu (10.6128°, 12.1946°, elevation 762 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).