Bol weather in September

In September, Bol sees average daytime highs of 36°C and overnight lows near 26°C, with 34 mm of rain across 6 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 34°C in the first days to 38°C by the end. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels oppressive.

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

Daytime high
36°
6th warmest
Overnight low
26°
9th coldest
Rainfall
34 mm
6 wet days
Daylight
12 h 06 min
5:53 AM – 5:58 PM
Cloud cover
48%
10th clearest
Wind
10 km/h
12th windiest
Solar energy
6.28 kWh/m²
Travel score
2.2
out of 10

Bol is city in 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 34°C in the first days to 38°C by the end.

A typical September day in Bol reaches about 36°C in the afternoon and slips back to 26°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 39°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°45°151015202530
Avg high (°C)Avg low (°C)
13426
23426
33426
43426
53426
63426
73526
83526
93526
103526
113526
123526
133626
143626
153626
163626
173626
183626
193726
203726
213726
223726
233726
243726
253726
263826
273826
283826
293826
303826

How September really feels in Bol

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
27 feel dangerously hot (≥ 39°C)
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.

Bol 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
Jan31° / 15°0011.36.1
Feb34° / 18°0011.64.0
Mar38° / 22°0011.91.4
Apr41° / 26°10.312.30.0
May41° / 28°62.112.60.0
Jun39° / 28°103.712.80.5
Jul35° / 27°569.812.72.3
Aug33° / 25°10314.212.43.1
Sep36° / 26°34612.12.2
Oct38° / 25°51.411.71.4
Nov35° / 20°0011.43.1
Dec32° / 16°0011.25.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24852
35050
45050
55248
65347
75545
85545
95743
105842
116040
126238
136337
146436
156634
166733
176931
187030
197129
207327
217426
227525
237525
247723
257723
267822
277822
287921
297921
308020

Chance of precipitation in September

Any precipitation

Bol gets around 34 mm of rain over 6 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 20% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
234
333
432
530
629
728
827
925
1024
1123
1222
1321
1420
1519
1618
1717
1816
1916
2015
2114
2214
2313
2412
2512
2612
2711
2811
2910
3010

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 86% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100167716
200177715
300187615
400197515
5012107314
6012107314
7012117214
8113127013
9113136913
10123146713
11124146712
12124156612
13235166311
14235176310
15245176210
1634618609
1735619589
1845720568
1946721557
2056722537
2167823506
2267824495
2378825475
2488826454
2598927443
26109928423
27119928402
2812101029382
2914101029361
3015101129341

Wind in September

Winds average 10 km/h in September, the calmest month.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
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 5:53 AM to 5:54 AM, and sunset from 6:09 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:536:09
212.35:536:08
312.25:536:07
412.25:536:07
512.25:536:06
612.25:536:05
712.25:536:04
812.25:536:04
912.25:536:03
1012.25:536:02
1112.15:536:01
1212.15:536:01
1312.15:536:00
1412.15:535:59
1512.15:535:58
1612.15:535:58
1712.15:535:57
1812.05:535:56
1912.05:535:55
2012.05:535:55
2112.05:535:54
2212.05:535:53
2312.05:535:52
2412.05:535:52
2512.05:535:51
2611.95:535:50
2711.95:535:49
2811.95:545:49
2911.95:545:48
3011.95:545:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.28 kWh/m².

For context, solar energy here swings from a low near 5.68 kWh/m² to a high of 7.37 kWh/m² in April across the year — September's 6.28 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
26.0Bright
36.0Intense
46.0Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
Planning a trip in September

Hazard calendar for Bol

In seasonPeak

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

Bol sees dust haze year-round, heaviest in March.

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

Is September a good time to visit Bol?

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

2.2
Sightseeing
7th-best month of the year
5.3
Beach & pool
6th-best month of the year

September is a weaker month for outdoor sightseeing in Bol.

What to pack for Bol in September

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

In September, Bol sees daytime highs around 36°C and nights near 26°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Bol 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 Bol peaks around August 18 at about 13 (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 13Dec 16UV 8
UV index (midday)Level
Jan10Very high
Feb10Extreme
Mar13Extreme
Apr11Extreme
May9Very high
Jun10Extreme
Jul11Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec7Very high

Air quality in Bol 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 Bol is worst in February — around 121 µg/m³ PM2.5 (unhealthy), about 5.1× the cleanest month (August, 24 µg/m³).

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

0306090120150JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModerateUnhealthyFeb 12120 µg/m³Aug 2224 µg/m³
PM2.5 (µg/m³)Level
Jan116Unhealthy
Feb121Unhealthy
Mar108Unhealthy
Apr78Unhealthy
May51Poor
Jun42Poor
Jul31Moderate
Aug24Moderate
Sep25Moderate
Oct56Unhealthy
Nov73Unhealthy
Dec111Unhealthy
Location & terrain

Where is Bol?

Bol sits at 13.5°N, 14.7°E, 291 m above sea level, in Chad. The nearest listed city is Blangwa, 79 km away.

MassakoryGamboruMassaguetKukawaMongunoN'Djamena

Topography around Bol

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

Within 3 km, the terrain around Bol has only modest variations in elevation — a maximum elevation change of 20 m around an average of 284 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 32 m; within 80 km, only modest variations in elevation — a maximum elevation change of 80 m.

The land around Bol is covered by grassland (42%) and wetland (29%) within 3 km, grassland (52%) and wetland (21%) within 16 km, and grassland (63%) and wetland (21%) within 80 km.

3 km
20 m
16 km
32 m
80 km
80 m
treesshrubsgrasslandartificial surfacesbare terrainwaterwetland
September weather nearby: Blangwa 79 km · Mao 97 km · Massakory 122 km · Gamboru 133 km · Massaguet 135 km · Kukawa 138 km · Monguno 149 km · N'Djamena 155 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 Bol (13.4673°, 14.7135°, elevation 291 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).