Biltine weather in September

In September, Biltine sees average daytime highs of 35°C and overnight lows near 24°C, with 41 mm of rain across 6.4 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 33°C in the first days to 37°C by the end. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels muggy.

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 Biltine's 10th-clearest and 12th-windiest month. For the whole year in context, see Biltine's year-round climate.

Daytime high
35°
6th warmest
Overnight low
24°
7th coldest
Rainfall
41 mm
6.4 wet days
Daylight
12 h 06 min
5:28 AM – 5:33 PM
Cloud cover
42%
10th clearest
Wind
9 km/h
12th windiest
Solar energy
6.48 kWh/m²
Travel score
2.5
out of 10

Biltine is place in Wadi Fira Region, Chad.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 33°C in the first days to 37°C by the end.

A typical September day in Biltine reaches about 35°C in the afternoon and slips back to 24°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 38°C. Set against its neighbours, September runs about 3°C warmer than August and about 2°C cooler than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13323
23323
33323
43323
53323
63423
73423
83423
93423
103423
113523
123523
133523
143524
153524
163624
173624
183624
193624
203624
213724
223724
233724
243724
253724
263724
273724
283724
293724
303724

How September really feels in Biltine

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.

Biltine weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 17°0011.25.3
Feb35° / 19°0011.53.7
Mar37° / 22°0011.91.7
Apr40° / 26°10.312.30.2
May40° / 27°61.912.70.1
Jun39° / 26°154.212.80.9
Jul35° / 24°8312.912.82.4
Aug32° / 23°1601912.53.2
Sep35° / 24°416.412.12.5
Oct37° / 24°41.211.71.8
Nov35° / 21°0011.33.3
Dec33° / 17°0011.24.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25743
35842
46040
56238
66337
76535
86733
96832
106931
117129
127228
137426
147426
157624
167624
177822
187822
197822
207921
217921
227921
238020
248020
258020
268119
278020
288020
298119
308119

Chance of precipitation in September

Any precipitation

Biltine gets around 41 mm of rain over 6.4 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 22% and peaks near 45% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
145
243
341
439
537
635
733
831
929
1027
1126
1224
1323
1421
1520
1619
1717
1816
1915
2014
2114
2213
2312
2412
2512
2611
2711
2810
2910
3010

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11152766
21152865
32163061
42273158
52283355
62393452
73393649
834103745
945113842
1055123939
1166134035
1277144032
1388154028
14108164025
15129173922
161410193820
171611203617
181811213515
192112213313
202312223111
212613232910
22281323288
23311323267
24331323255
25361323234
26391223224
27411223213
28441222193
29471221182
30491120172

Wind in September

Winds average 9 km/h in September, the calmest month.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 5:27 AM to 5:29 AM, and sunset from 5:45 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:275:45
212.35:285:44
312.35:285:43
412.25:285:42
512.25:285:42
612.25:285:41
712.25:285:40
812.25:285:39
912.25:285:39
1012.25:285:38
1112.15:285:37
1212.15:285:36
1312.15:285:35
1412.15:285:35
1512.15:285:34
1612.15:285:33
1712.15:285:32
1812.15:285:31
1912.05:285:31
2012.05:285:30
2112.05:285:29
2212.05:295:28
2312.05:295:28
2412.05:295:27
2512.05:295:26
2611.95:295:25
2711.95:295:24
2811.95:295:24
2911.95:295:23
3011.95:295:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.48 kWh/m².

For context, solar energy here swings from a low near 5.77 kWh/m² to a high of 7.61 kWh/m² in April across the year — September's 6.48 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.3Intense
76.3Intense
86.3Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.6Intense
206.6Intense
216.6Intense
226.6Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Biltine

In seasonPeak

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

Biltine sees seasonal dust haze (March–October), heaviest in June.

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

Is September a good time to visit Biltine?

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

2.5
Sightseeing
6th-best month of the year
5.6
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Biltine.

What to pack for Biltine in September

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

In September, Biltine sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Biltine in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Biltine peaks around August 21 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 highExtremeExtremeVery highAug 21UV 12Dec 16UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar11Extreme
Apr10Extreme
May10Extreme
Jun11Extreme
Jul10Very high
Aug12Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Biltine 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 Biltine is worst in March — around 63 µg/m³ PM2.5 (unhealthy), about 2.8× the cleanest month (September, 22 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModerateMar 1761 µg/m³Sep 922 µg/m³
PM2.5 (µg/m³)Level
Jan37Poor
Feb48Poor
Mar63Unhealthy
Apr50Poor
May42Poor
Jun42Poor
Jul35Poor
Aug22Moderate
Sep22Moderate
Oct29Moderate
Nov25Moderate
Dec32Moderate
Location & terrain

Where is Biltine?

Biltine sits at 14.5°N, 20.9°E, 518 m above sea level, in Chad. The nearest listed city is Abéché, 78 km away.

IribaAdréUmm HājarEl Geneina FortAl-Junaynah'ĀrdamatāGoz Beida

Topography around Biltine

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

Within 3 km, the terrain around Biltine has only modest variations in elevation — a maximum elevation change of 159 m around an average of 516 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 398 m; within 80 km, large variations in elevation — a maximum elevation change of 773 m.

The land around Biltine is covered by grassland (58%) and bare terrain (37%) within 3 km, grassland (85%) within 16 km, and grassland (89%) within 80 km.

3 km
159 m
16 km
398 m
80 km
773 m
shrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Abéché 78 km · Iriba 157 km · Adré 181 km · Umm Hājar 191 km · El Geneina Fort 202 km · Al-Junaynah 203 km · 'Ārdamatā 205 km · Goz Beida 261 km

Chad travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / D / E / F
220 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$1,022
2025
Happiness
4.4 / 10
World Happiness, 2025
Safe drinking water
6%
of population, 2024
Road deaths
32.4
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Muslim 52%Protestant 24%Roman Catholic 20%none 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 Biltine (14.5273°, 20.926°, elevation 518 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).