N’Gaous weather in September

In September, N’Gaous sees average daytime highs of 29°C and overnight lows near 18°C, with 21 mm of rain across 4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 32°C in the first days to 27°C by the end. The sky is clear or mostly clear about 61% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is N’Gaous's 4th-clearest and 8th-windiest month. For the whole year in context, see N’Gaous's year-round climate.

Daytime high
29°
4th warmest
Overnight low
18°
9th coldest
Rainfall
21 mm
4 wet days
Daylight
12 h 12 min
6:25 AM – 6:39 PM
Cloud cover
37%
4th clearest
Wind
9 km/h
8th windiest
Solar energy
5.64 kWh/m²
Travel score
6.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 32°C in the first days to 27°C by the end.

A typical September day in N’Gaous reaches about 29°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, September runs about 6°C cooler than August and about 6°C warmer than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13220
23220
33220
43220
53120
63119
73119
83119
93119
103019
113019
123018
133018
142918
152918
162918
172918
182917
192817
202817
212817
222817
232817
242716
252716
262716
272716
282716
292616
302615

How September really feels in N’Gaous

Once humidity and wind are folded in, September averages 2 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
2
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.

N’Gaous weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan12° / 2350.59.93.5
Feb13° / 174.50.410.74.4
Mar17° / 275.30.111.76.4
Apr21° / 10°295.4012.97.4
May27° / 14°213.6013.87.8
Jun32° / 19°82.2014.44.9
Jul36° / 23°41.1014.22.9
Aug35° / 22°72.6013.33.4
Sep29° / 18°214012.26.5
Oct23° / 13°234.4011.18.0
Nov17° / 244.4010.16.1
Dec13° / 214.60.39.64.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 23%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18713
28515
38515
48317
58317
68119
78119
87921
97921
107921
117822
127822
137723
147624
157525
167525
177426
187426
197426
207327
217327
227327
237327
247327
257327
267327
277327
287426
297426
307426

Chance of precipitation in September

Any precipitation

N’Gaous gets around 21 mm of rain over 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 13% and peaks near 14% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
112
212
312
413
513
613
713
813
913
1013
1113
1212
1312
1413
1513
1613
1713
1813
1913
2013
2114
2214
2314
2414
2514
2614
2714
2814
2914
3014

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 73% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
170282
269292
369292
468302
567303
667303
767303
867294
968284
1069274
1169265
1270255
1371245
1472235
1573225
1674215
1775205
1875205
1976195
2076195
2177194
2278184
2378184
2479183
2579183
2679183
2780182
2880182
2980182
3081181

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 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
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 6:14 AM to 6:36 AM, and sunset from 7:01 PM to 6:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:147:01
212.86:146:59
312.76:156:58
412.76:166:57
512.66:176:55
612.66:186:54
712.66:186:52
812.56:196:51
912.56:206:49
1012.56:216:48
1112.46:216:46
1212.46:226:45
1312.36:236:43
1412.36:246:42
1512.36:246:40
1612.26:256:39
1712.26:266:37
1812.16:276:35
1912.16:286:34
2012.16:286:32
2112.06:296:31
2212.06:306:29
2312.06:316:28
2411.96:326:26
2511.96:326:25
2611.86:336:23
2711.86:346:22
2811.86:356:20
2911.76:366:19
3011.76:366:17

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.64 kWh/m².

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 7.72 kWh/m² in June across the year — September's 5.64 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.2Intense
46.2Intense
56.1Intense
66.1Intense
76.0Intense
86.0Bright
95.9Bright
105.9Bright
115.8Bright
125.8Bright
135.8Bright
145.7Bright
155.7Bright
165.6Bright
175.6Bright
185.5Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.3Bright
245.3Bright
255.2Bright
265.2Bright
275.2Bright
285.1Bright
295.1Bright
305.0Bright
Planning a trip in September

Hazard calendar for N’Gaous

In seasonPeak

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

N’Gaous sees seasonal dust haze (April–September), heaviest in June.

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

Is September a good time to visit N’Gaous?

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

6.5
Sightseeing
4th-best month of the year
8.0
Beach & pool
1st-best month of the year

September is a reasonable time to visit N’Gaous for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for N’Gaous in September

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

In September, N’Gaous sees daytime highs around 29°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

UV index in N’Gaous in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in N’Gaous peaks around July 14 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 14UV 10Dec 20UV 2
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in N’Gaous 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 N’Gaous is worst in June — around 35 µg/m³ PM2.5 (poor), about 1.8× the cleanest month (November, 19 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1735 µg/m³Nov 2219 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb21Moderate
Mar25Moderate
Apr31Moderate
May31Moderate
Jun35Poor
Jul32Moderate
Aug31Moderate
Sep32Moderate
Oct26Moderate
Nov19Moderate
Dec20Moderate
Location & terrain

Where is N’Gaous?

N’Gaous sits at 35.6°N, 5.6°E, 758 m above sea level, in Algeria. The nearest listed city is Râs el Aïoun, 14 km away.

Topography around N’Gaous

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

Within 3 km, the terrain around N’Gaous has significant variations in elevation — a maximum elevation change of 266 m around an average of 751 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,166 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,205 m.

The land around N’Gaous is covered by grassland (34%) and bare terrain (21%) within 3 km, grassland (49%) and cropland (22%) within 16 km, and grassland (33%), cropland (33%) and bare terrain (23%) within 80 km.

3 km
266 m
16 km
1,166 m
80 km
2,205 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Râs el Aïoun 14 km · Merouana 29 km · Barika 29 km · ’Aïn Azel 31 km · Aïn Touta 33 km · Salah Bey 44 km · Aïn Oulmene 50 km · Batna 51 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 N’Gaous (35.555°, 5.6106°, elevation 758 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).