Aïn Arnat weather in September

In September, Aïn Arnat sees average daytime highs of 27°C and overnight lows near 15°C, with 43 mm of rain across 8.8 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 29°C in the first days to 24°C by the end. The sky is clear or mostly clear about 48% 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 Aïn Arnat's 4th-clearest and 10th-windiest month. For the whole year in context, see Aïn Arnat's year-round climate.

Daytime high
27°
4th warmest
Overnight low
15°
9th coldest
Rainfall
43 mm
8.8 wet days
Daylight
12 h 12 min
6:26 AM – 6:40 PM
Cloud cover
44%
4th clearest
Wind
7 km/h
10th windiest
Solar energy
5.28 kWh/m²
Travel score
6.9
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 29°C in the first days to 24°C by the end.

A typical September day in Aïn Arnat reaches about 27°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 31°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12918
22917
32917
42917
52817
62817
72817
82817
92816
102716
112716
122716
132716
142716
152716
162615
172615
182615
192615
202615
212615
222515
232514
242514
252514
262514
272414
282414
292414
302413

How September really feels in Aïn Arnat

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Aïn Arnat 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 daysSnow daysDaylight (hours)Travel score
Jan11° / 579.62.29.82.7
Feb12° / 499.42.410.63.2
Mar15° / 599.51.211.74.7
Apr18° / 63100.212.95.9
May23° / 11°528.5013.97.2
Jun28° / 16°205.2014.46.9
Jul32° / 19°93.1014.25.1
Aug32° / 19°195.4013.45.0
Sep27° / 15°438.8012.26.9
Oct22° / 11°397.6011.17.1
Nov15° / 458.5010.15.0
Dec12° / 508.51.29.63.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% 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 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28119
38020
47921
57723
67723
77624
87525
97426
107327
117327
127129
137030
147030
156832
166733
176733
186535
196535
206436
216337
226337
236337
246337
256337
266337
276238
286238
296337
306337

Chance of precipitation in September

Any precipitation

Aïn Arnat gets around 43 mm of rain over 8.8 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 28% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
227
328
428
529
629
729
829
929
1029
1129
1229
1329
1429
1529
1629
1729
1829
1929
2029
2129
2229
2329
2428
2528
2628
2728
2827
2927
3027

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 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12848232
22848232
32848222
42948221
52948211
63048211
73147201
83347191
93446191
103646181
113745171
123944171
134143160
144242150
154442140
164541130
174741130
184840120
194940110
205040100
21514090
22533980
23543970
24553960
25553960
26563950
27583840
28593830
29603730
30623620

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 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
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:38 AM, and sunset from 7:03 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:147:03
212.86:157:01
312.76:167:00
412.76:176:58
512.76:176:57
612.66:186:55
712.66:196:54
812.56:206:52
912.56:216:51
1012.56:216:49
1112.46:226:48
1212.46:236:46
1312.36:246:44
1412.36:256:43
1512.36:256:41
1612.26:266:40
1712.26:276:38
1812.16:286:37
1912.16:296:35
2012.16:306:34
2112.06:306:32
2212.06:316:31
2312.06:326:29
2411.96:336:27
2511.96:346:26
2611.86:346:24
2711.86:356:23
2811.86:366:21
2911.76:376:20
3011.76:386:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.28 kWh/m².

For context, solar energy here swings from a low near 2.37 kWh/m² to a high of 7.51 kWh/m² in July across the year — September's 5.28 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
25.9Bright
35.9Bright
45.8Bright
55.8Bright
65.7Bright
75.7Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
Planning a trip in September

Hazard calendar for Aïn Arnat

In seasonPeak

None of Aïn Arnat's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Aïn Arnat sees seasonal dust haze (June–July), heaviest in June.

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

Is September a good time to visit Aïn Arnat?

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

6.9
Sightseeing
3rd-best month of the year
6.9
Beach & pool
4th-best month of the year

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

What to pack for Aïn Arnat in September

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

In September, Aïn Arnat sees daytime highs around 27°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Aïn Arnat in September

The nearest coast averages about 25°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 49 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from May 30 to Nov 12 — about 5.5 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar15Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Aïn Arnat 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 Aïn Arnat 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
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Aïn Arnat 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 Aïn Arnat is worst in September — around 32 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1732 µg/m³Nov 1926 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb27Moderate
Mar29Moderate
Apr31Moderate
May30Moderate
Jun31Moderate
Jul30Moderate
Aug30Moderate
Sep32Moderate
Oct31Moderate
Nov25Moderate
Dec27Moderate
Location & terrain

Where is Aïn Arnat?

Aïn Arnat sits at 36.2°N, 5.3°E, 1,022 m above sea level, in Algeria. The nearest listed city is Sétif, 9.0 km away.

Topography around Aïn Arnat

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

Within 3 km, the terrain around Aïn Arnat has only modest variations in elevation — a maximum elevation change of 163 m around an average of 1,013 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 907 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,998 m.

The land around Aïn Arnat is covered by cropland (70%) within 3 km, cropland (63%) and grassland (25%) within 16 km, and grassland (37%) and cropland (33%) within 80 km.

3 km
163 m
16 km
907 m
80 km
1,998 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sétif 9.0 km · Bougaa 26 km · Aïn Oulmene 29 km · El Eulma 34 km · Salah Bey 37 km · Râs el Oued 37 km · Babor 39 km · Bordj Zemoura 42 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 Aïn Arnat (36.1868°, 5.3135°, elevation 1,022 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).