Aïn Oussera weather in September

In September, Aïn Oussera sees average daytime highs of 30°C and overnight lows near 17°C, with 22 mm of rain across 4.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 33°C in the first days to 28°C by the end. The sky is clear or mostly clear about 58% 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 Oussera's 4th-clearest and 11th-windiest month. For the whole year in context, see Aïn Oussera's year-round climate.

Daytime high
30°
4th warmest
Overnight low
17°
9th coldest
Rainfall
22 mm
4.1 wet days
Daylight
12 h 12 min
6:36 AM – 6:49 PM
Cloud cover
38%
4th clearest
Wind
10 km/h
11th windiest
Solar energy
5.66 kWh/m²
Travel score
5.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 33°C in the first days to 28°C by the end.

A typical September day in Aïn Oussera reaches about 30°C in the afternoon and slips back to 17°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 35°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)
13420
23420
33320
43319
53319
63319
73219
83219
93219
103218
113118
123118
133118
143118
153017
163017
173017
183017
193017
202917
212916
222916
232916
242816
252816
262816
272815
282815
292815
302715

How September really feels in Aïn Oussera

Once humidity and wind are folded in, September averages 8 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
8
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.

Aïn Oussera weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 214.99.93.8
Feb14° / 184.810.74.8
Mar18° / 244.611.76.8
Apr22° / 275.112.97.6
May27° / 14°254.613.87.3
Jun33° / 19°102.114.34.2
Jul37° / 23°41.214.21.7
Aug36° / 22°71.713.32.4
Sep30° / 17°224.112.25.8
Oct24° / 13°234.311.17.9
Nov17° / 194.310.16.3
Dec13° / 204.69.64.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% 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 26%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28218
38119
47921
57921
67822
77723
87723
97624
107624
117525
127426
137426
147327
157327
167327
177228
187228
197228
207129
217129
227030
237030
246931
256931
266832
276931
286931
296832
306832

Chance of precipitation in September

Any precipitation

Aïn Oussera gets around 22 mm of rain over 4.1 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 13% and peaks near 15% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
19
29
310
410
511
611
711
812
912
1012
1112
1212
1312
1412
1512
1612
1713
1813
1913
2014
2114
2214
2315
2415
2515
2615
2715
2815
2915
3015

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 69% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1692560
2682660
3672670
4672670
5652681
6652681
7662581
8652591
9662491
106524101
116623101
126623101
136622111
146622111
156622111
166622111
176821101
186921100
196921100
206921100
21702190
22692290
23702280
24702280
25712270
26722260
27722260
28742150
29742150
30752140

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 6:25 AM to 6:47 AM, and sunset from 7:12 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:257:12
212.76:257:10
312.76:267:09
412.76:277:07
512.66:287:06
612.66:287:04
712.66:297:03
812.56:307:01
912.56:317:00
1012.46:316:58
1112.46:326:57
1212.46:336:55
1312.36:346:54
1412.36:356:52
1512.36:356:51
1612.26:366:49
1712.26:376:48
1812.16:386:46
1912.16:386:45
2012.16:396:43
2112.06:406:42
2212.06:416:40
2312.06:426:39
2411.96:426:37
2511.96:436:36
2611.86:446:34
2711.86:456:33
2811.86:466:31
2911.76:466:30
3011.76:476:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.66 kWh/m².

For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 7.73 kWh/m² in June across the year — September's 5.66 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.3Intense
36.3Intense
46.2Intense
56.2Intense
66.1Intense
76.1Intense
86.0Intense
96.0Bright
105.9Bright
115.9Bright
125.8Bright
135.8Bright
145.8Bright
155.7Bright
165.7Bright
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 Aïn Oussera

In seasonPeak

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

Aïn Oussera sees seasonal dust haze (April–September), heaviest in July.

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

Is September a good time to visit Aïn Oussera?

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

5.8
Sightseeing
6th-best month of the year
7.9
Beach & pool
1st-best month of the year

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

What to pack for Aïn Oussera in September

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

In September, Aïn Oussera sees daytime highs around 30°C and nights near 17°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

UV index in Aïn Oussera in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aïn Oussera peaks around June 22 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 highModerateJun 22UV 10Dec 19UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar7High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Aïn Oussera 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 Oussera is worst in September — around 31 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 14 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1231 µg/m³Dec 2314 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb18Moderate
Mar25Moderate
Apr28Moderate
May27Moderate
Jun30Moderate
Jul29Moderate
Aug29Moderate
Sep31Moderate
Oct22Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Aïn Oussera?

Aïn Oussera sits at 35.5°N, 2.9°E, 685 m above sea level, in Algeria. The nearest listed city is Birine, 35 km away.

Topography around Aïn Oussera

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

Within 3 km, the terrain around Aïn Oussera has only modest variations in elevation — a maximum elevation change of 60 m around an average of 688 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 177 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,364 m.

The land around Aïn Oussera is covered by bare terrain (46%) and artificial surfaces (29%) within 3 km, bare terrain (44%), grassland (28%) and cropland (26%) within 16 km, and grassland (36%), bare terrain (35%) and cropland (25%) within 80 km.

3 km
60 m
16 km
177 m
80 km
1,364 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Birine 35 km · Hassi Bahbah 44 km · Ksar el Boukhari 51 km · Ksar Chellala 60 km · Chellalat el Adhaouara 71 km · Berrouaghia 76 km · Dar Chioukh 81 km · Médéa 91 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 Oussera (35.4514°, 2.9058°, elevation 685 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).