In Salah weather in September

In September, In Salah sees average daytime highs of 40°C and overnight lows near 27°C, with 1 mm of rain across 0.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 42°C in the first days to 38°C by the end. The sky is clear or mostly clear about 83% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is In Salah's 5th-clearest and 11th-windiest month. For the whole year in context, see In Salah's year-round climate.

Daytime high
40°
4th warmest
Overnight low
27°
9th coldest
Rainfall
1 mm
0.1 wet days
Daylight
12 h 12 min
6:40 AM – 6:49 PM
Cloud cover
20%
5th clearest
Wind
17 km/h
11th windiest
Solar energy
6.59 kWh/m²
Travel score
0.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 42°C in the first days to 38°C by the end.

A typical September day in In Salah reaches about 40°C in the afternoon and slips back to 27°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 37°C and 44°C. Set against its neighbours, September runs about 3°C cooler than August and about 6°C warmer than October.

20°25°30°35°40°45°151015202530
Avg high (°C)Avg low (°C)
14229
24229
34229
44229
54228
64228
74228
84228
94228
104128
114128
124128
134127
144127
154127
164127
174127
184027
194026
204026
214026
224026
233926
243925
253925
263925
273825
283825
293824
303824

How September really feels in In Salah

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
24 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.

In Salah weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 20.410.58.7
Feb24° / 10°10.4119.1
Mar28° / 14°20.411.87.8
Apr33° / 18°20.412.64.4
May38° / 24°10.113.31.3
Jun43° / 28°0013.70.0
Jul45° / 30°0013.50.0
Aug44° / 30°00130.0
Sep40° / 27°10.112.20.3
Oct34° / 21°10.411.33.8
Nov27° / 13°10.310.78.4
Dec22° / 20.310.38.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 83% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1973
2964
3964
4964
5964
6964
7964
8955
9946
10946
11946
12937
13928
14928
15919
169010
178911
188911
198812
208713
218713
228614
238515
248515
258515
268416
278416
288416
298416
308416

Chance of precipitation in September

Any precipitation

In Salah gets around 1 mm of rain over 0.1 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 1% and peaks near 1% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
161
171
181
191
201
211
221
231
241
251
261
271
281
291
301

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
194510
294510
394510
493610
593610
693610
793610
893610
993610
1093610
1194600
1295500
1395500
1495500
1595500
1696400
1795401
1895401
1995401
2093511
2193511
2293511
2393511
2493511
2593511
2693511
2793511
2893511
2993511
3093511

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
119light breeze
219light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over September. Sunrise moves from 6:33 AM to 6:46 AM, and sunset from 7:07 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:337:07
212.56:337:06
312.56:347:04
412.56:347:03
512.56:357:02
612.46:357:01
712.46:367:00
812.46:366:59
912.46:366:58
1012.36:376:56
1112.36:376:55
1212.36:386:54
1312.26:386:53
1412.26:396:52
1512.26:396:50
1612.26:406:49
1712.16:406:48
1812.16:416:47
1912.16:416:46
2012.06:416:44
2112.06:426:43
2212.06:426:42
2312.06:436:41
2411.96:436:40
2511.96:446:38
2611.96:446:37
2711.96:456:36
2811.86:456:35
2911.86:466:34
3011.86:466:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.59 kWh/m².

For context, solar energy here swings from a low near 4.12 kWh/m² to a high of 7.96 kWh/m² in June across the year — September's 6.59 kWh/m² falls in the middle.

02468151015202530
Solar energy (kWh/m²)Level
17.1Intense
27.0Intense
37.0Intense
47.0Intense
57.0Intense
66.9Intense
76.9Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.7Intense
136.7Intense
146.7Intense
156.6Intense
166.6Intense
176.5Intense
186.5Intense
196.5Intense
206.4Intense
216.4Intense
226.4Intense
236.3Intense
246.3Intense
256.3Intense
266.2Intense
276.2Intense
286.2Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for In Salah

In seasonPeak

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

In Salah sees seasonal dust haze (February–October), heaviest in June.

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

Is September a good time to visit In Salah?

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

0.3
Sightseeing
9th-best month of the year
2.9
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in In Salah.

What to pack for In Salah in September

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

In September, In Salah sees daytime highs around 40°C and nights near 27°C. Pack light clothes and sun protection.

light clothessun protection

UV index in In Salah in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in In Salah peaks around July 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 12UV 10Dec 17UV 4
UV index (midday)Level
Jan5High
Feb7High
Mar9Very high
Apr9Very high
May10Extreme
Jun10Very high
Jul11Extreme
Aug8Very high
Sep10Very high
Oct7High
Nov5High
Dec4Moderate

Air quality in In Salah 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 In Salah is worst in July — around 106 µg/m³ PM2.5 (unhealthy), about 1.7× the cleanest month (November, 64 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyJul 17104 µg/m³Nov 1567 µg/m³
PM2.5 (µg/m³)Level
Jan80Unhealthy
Feb104Unhealthy
Mar93Unhealthy
Apr97Unhealthy
May103Unhealthy
Jun91Unhealthy
Jul106Unhealthy
Aug93Unhealthy
Sep87Unhealthy
Oct87Unhealthy
Nov64Unhealthy
Dec92Unhealthy
Location & terrain

Where is In Salah?

In Salah sits at 27.2°N, 2.5°E, 293 m above sea level, in Algeria. The nearest listed city is Aoulef, 141 km away.

AoulefRegganeAdrarTimimounEl MeniaMetlili ChaambaTamanghassetRouissat

Topography around In Salah

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

Within 3 km, the terrain around In Salah has only modest variations in elevation — a maximum elevation change of 37 m around an average of 283 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 166 m; within 80 km, significant variations in elevation — a maximum elevation change of 519 m.

The land around In Salah is covered by bare terrain (76%) within 3 km, bare terrain (96%) within 16 km, and bare terrain (100%) within 80 km.

3 km
37 m
16 km
166 m
80 km
519 m
treesshrubscroplandartificial surfacesbare terrain
September weather nearby: Aoulef 141 km · Reggane 235 km · Adrar 284 km · Timimoun 318 km · El Menia 378 km · Metlili Chaamba 575 km · Tamanghasset 579 km · Rouissat 594 km

Algeria travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$6,051
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
69%
of population, 2024
Homicide rate
1.2
per 100k, 2023
Road deaths
20.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 468
Religion
Muslim 99%

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 In Salah (27.1968°, 2.4791°, elevation 293 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).