Ati weather in September

In September, Ati sees average daytime highs of 35°C and overnight lows near 25°C, with 60 mm of rain across 9.9 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 33°C in the first days to 37°C by the end. The sky is clear or mostly clear about 37% 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 Ati's 10th-clearest and 12th-windiest month. For the whole year in context, see Ati's year-round climate.

Daytime high
35°
9th warmest
Overnight low
25°
8th coldest
Rainfall
60 mm
9.9 wet days
Daylight
12 h 06 min
5:39 AM – 5:43 PM
Cloud cover
52%
10th clearest
Wind
8 km/h
12th windiest
Solar energy
6.17 kWh/m²
Travel score
2.4
out of 10

Ati is prefecture of Batha 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 Ati reaches about 35°C in the afternoon and slips back to 25°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 38°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)
13324
23324
33324
43324
53324
63324
73424
83424
93424
103424
113424
123424
133524
143524
153524
163525
173525
183625
193625
203625
213625
223625
233625
243725
253725
263725
273725
283725
293725
303725

How September really feels in Ati

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
18 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.

Ati 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°0011.34.8
Feb35° / 19°0011.63.0
Mar39° / 23°0011.90.7
Apr41° / 26°20.912.30.0
May41° / 28°82.812.60.0
Jun39° / 27°205.512.80.5
Jul35° / 25°8413.912.72.2
Aug32° / 24°17520.412.43.0
Sep35° / 25°609.912.12.4
Oct38° / 25°72.211.71.1
Nov37° / 22°0011.42.2
Dec34° / 18°0011.24.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24456
34654
44654
54852
65050
75149
85347
95545
105545
115743
125842
136040
146238
156238
166436
176436
186634
196634
206832
216832
226931
237030
247129
257129
267228
277228
287327
297426
307426

Chance of precipitation in September

Any precipitation

Ati gets around 60 mm of rain over 9.9 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 33% and peaks near 55% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
155
254
353
451
550
648
747
845
943
1041
1139
1237
1336
1434
1532
1630
1729
1827
1926
2024
2123
2222
2321
2420
2519
2619
2718
2817
2917
3016

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 70% 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 (%)
10003925
20004915
30004915
40005905
50006895
60006904
70007894
80008884
90009874
1000110854
1100111853
1201112833
1301214803
1401215793
1501217773
1601319743
1702320723
1812423682
1912425662
2012527632
2122529602
2223631562
2333633541
2433735511
2544836471
2654937441
27641039411
28651039381
29751140360
30961240330

Wind in September

Winds average 8 km/h in September, the calmest month.

Across September, daily wind ranges from about 8 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
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
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 5:39 AM to 5:39 AM, and sunset from 5:54 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:395:54
212.25:395:53
312.25:395:53
412.25:395:52
512.25:395:51
612.25:395:51
712.25:395:50
812.25:395:49
912.25:395:48
1012.15:395:48
1112.15:395:47
1212.15:395:46
1312.15:395:45
1412.15:395:45
1512.15:395:44
1612.15:395:43
1712.15:395:42
1812.05:395:42
1912.05:395:41
2012.05:395:40
2112.05:395:39
2212.05:395:39
2312.05:395:38
2412.05:395:37
2512.05:395:36
2611.95:395:36
2711.95:395:35
2811.95:395:34
2911.95:395:34
3011.95:395:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.17 kWh/m².

For context, solar energy here swings from a low near 5.51 kWh/m² to a high of 7.38 kWh/m² in April across the year — September's 6.17 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.9Bright
45.9Bright
55.9Bright
66.0Bright
76.0Bright
86.0Intense
96.0Intense
106.1Intense
116.1Intense
126.1Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.3Intense
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 Ati

In seasonPeak

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

Ati sees seasonal dust haze (February–October), heaviest in April.

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

Is September a good time to visit Ati?

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

2.4
Sightseeing
5th-best month of the year
5.2
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Ati.

What to pack for Ati in September

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

In September, Ati sees daytime highs around 35°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in Ati 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 Ati peaks around August 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highAug 16UV 13Dec 15UV 8
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar11Extreme
Apr11Extreme
May9Very high
Jun10Extreme
Jul11Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Ati 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 Ati is worst in March — around 88 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (September, 21 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyMar 1286 µg/m³Sep 921 µg/m³
PM2.5 (µg/m³)Level
Jan77Unhealthy
Feb82Unhealthy
Mar88Unhealthy
Apr63Unhealthy
May42Poor
Jun36Poor
Jul28Moderate
Aug21Moderate
Sep21Moderate
Oct38Poor
Nov45Poor
Dec67Unhealthy
Location & terrain

Where is Ati?

Ati sits at 13.2°N, 18.3°E, 340 m above sea level, in Chad. The nearest listed city is Mongo, 120 km away.

MongoBitkineUmm HājarBokoroMangalméMoussoroAbéchéMassakory

Topography around Ati

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

Within 3 km, the terrain around Ati has only modest variations in elevation — a maximum elevation change of 15 m around an average of 330 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 23 m; within 80 km, significant variations in elevation — a maximum elevation change of 411 m.

The land around Ati is covered by grassland (76%) within 3 km, grassland (95%) within 16 km, and grassland (88%) within 80 km.

3 km
15 m
16 km
23 m
80 km
411 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Mongo 120 km · Bitkine 138 km · Umm Hājar 147 km · Bokoro 167 km · Mangalmé 168 km · Moussoro 206 km · Abéché 278 km · Massakory 283 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 Ati (13.2138°, 18.3393°, elevation 340 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).