Umm Hājar weather in September

In September, Umm Hājar sees average daytime highs of 34°C and overnight lows near 24°C, with 67 mm of rain across 10.9 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 32°C in the first days to 36°C by the end. The sky is clear or mostly clear about 36% 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 Umm Hājar's 10th-clearest and 12th-windiest month. For the whole year in context, see Umm Hājar's year-round climate.

Daytime high
34°
9th warmest
Overnight low
24°
7th coldest
Rainfall
67 mm
10.9 wet days
Daylight
12 h 06 min
5:33 AM – 5:38 PM
Cloud cover
53%
10th clearest
Wind
7 km/h
12th windiest
Solar energy
6.16 kWh/m²
Travel score
2.7
out of 10

Umm Hājar is place in Batha, 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 32°C in the first days to 36°C by the end.

A typical September day in Umm Hājar reaches about 34°C in the afternoon and slips back to 24°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 37°C. Set against its neighbours, September runs about 3°C warmer than August and about 3°C cooler than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53323
63323
73324
83324
93324
103324
113424
123424
133424
143424
153424
163524
173524
183524
193524
203524
213524
223624
233624
243624
253624
263624
273625
283725
293725
303725

How September really feels in Umm Hājar

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
11 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.

Umm Hājar weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 17°0011.34.4
Feb36° / 20°0011.62.6
Mar39° / 23°0011.90.5
Apr41° / 26°2112.30.0
May41° / 28°103.112.60.0
Jun39° / 27°24712.80.5
Jul35° / 25°11718.212.72.0
Aug32° / 23°21723.612.42.8
Sep34° / 24°6710.912.12.7
Oct38° / 24°82.311.71.4
Nov37° / 22°0011.42.2
Dec34° / 18°0011.23.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 42%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13763
23862
34060
44258
54456
64555
74753
84951
95149
105248
115446
125644
135743
145941
156040
166139
176238
186337
196337
206436
216535
226634
236634
246634
256832
266832
277030
287030
297129
307228

Chance of precipitation in September

Any precipitation

Umm Hājar gets around 67 mm of rain over 10.9 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 36% and peaks near 63% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
163
262
360
458
556
655
753
851
948
1046
1144
1241
1339
1437
1534
1632
1730
1829
1927
2025
2124
2223
2321
2420
2519
2619
2718
2818
2917
3017

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 74% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10000982
20001972
30001972
40001972
50002962
60002962
70003952
80004942
90005932
100016912
110017902
120019882
1300110881
1400212851
1500214831
1600316801
1701418761
1801420741
1911523691
2011625661
2111627641
2212729601
2322831561
2423933521
25331034490
26341135460
27441237430
28551337390
29661538360
30761638330

Wind in September

Winds average 7 km/h in September, the calmest month.

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.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 5:33 AM to 5:34 AM, and sunset from 5:49 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:335:49
212.25:335:48
312.25:335:47
412.25:335:47
512.25:335:46
612.25:335:45
712.25:335:44
812.25:335:44
912.25:335:43
1012.15:335:42
1112.15:335:41
1212.15:335:41
1312.15:335:40
1412.15:335:39
1512.15:335:38
1612.15:335:38
1712.15:335:37
1812.05:335:36
1912.05:335:35
2012.05:335:35
2112.05:335:34
2212.05:335:33
2312.05:335:32
2412.05:335:32
2512.05:335:31
2611.95:345:30
2711.95:345:30
2811.95:345:29
2911.95:345:28
3011.95:345:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.16 kWh/m².

For context, solar energy here swings from a low near 5.4 kWh/m² to a high of 7.36 kWh/m² in April across the year — September's 6.16 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.9Bright
75.9Bright
86.0Bright
96.0Bright
106.0Intense
116.0Intense
126.1Intense
136.1Intense
146.1Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Umm Hājar

In seasonPeak

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

Umm Hājar sees seasonal dust haze (March–October), heaviest in April.

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

Is September a good time to visit Umm Hājar?

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

2.7
Sightseeing
4th-best month of the year
5.4
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Umm Hājar.

What to pack for Umm Hājar in September

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

In September, Umm Hājar sees daytime highs around 34°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in Umm Hājar 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 Umm Hājar peaks around August 16 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeVery highAug 16UV 13Dec 16UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar11Extreme
Apr10Extreme
May10Very high
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Umm Hājar 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 Umm Hājar is worst in March — around 71 µg/m³ PM2.5 (unhealthy), about 3.4× the cleanest month (September, 21 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModerateMar 1768 µg/m³Sep 1021 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb53Poor
Mar71Unhealthy
Apr53Poor
May38Poor
Jun37Poor
Jul30Moderate
Aug21Moderate
Sep21Moderate
Oct28Moderate
Nov26Moderate
Dec35Moderate
Location & terrain

Where is Umm Hājar?

Umm Hājar sits at 13.3°N, 19.7°E, 397 m above sea level, in Chad. The nearest listed city is Mangalmé, 105 km away.

MangalméAbéchéAtiMongoBiltineBitkineGoz BeidaAm Timan

Topography around Umm Hājar

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

Within 3 km, the terrain around Umm Hājar has only modest variations in elevation — a maximum elevation change of 11 m around an average of 390 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 43 m; within 80 km, significant variations in elevation — a maximum elevation change of 295 m.

The land around Umm Hājar is covered by grassland (78%) within 3 km, grassland (91%) within 16 km, and grassland (92%) within 80 km.

3 km
11 m
16 km
43 m
80 km
295 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Mangalmé 105 km · Abéché 136 km · Ati 147 km · Mongo 165 km · Biltine 191 km · Bitkine 217 km · Goz Beida 221 km · Am Timan 258 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 Umm Hājar (13.2954°, 19.6966°, elevation 397 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).