Bir el Ater weather in September

In September, Bir el Ater sees average daytime highs of 29°C and overnight lows near 18°C, with 24 mm of rain across 4.7 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 26°C by the end. The sky is clear or mostly clear about 63% 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 Bir el Ater's 4th-clearest and 10th-windiest month. For the whole year in context, see Bir el Ater's year-round climate.

Daytime high
29°
4th warmest
Overnight low
18°
9th coldest
Rainfall
24 mm
4.7 wet days
Daylight
12 h 12 min
6:16 AM – 6:29 PM
Cloud cover
35%
4th clearest
Wind
11 km/h
10th windiest
Solar energy
5.66 kWh/m²
Travel score
6.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 31°C in the first days to 26°C by the end.

A typical September day in Bir el Ater 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 24°C and 33°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13120
23120
33120
43120
53120
63019
73019
83019
93019
103019
112919
122919
132918
142918
152918
162818
172818
182818
192818
202817
212717
222717
232717
242717
252716
262616
272616
282616
292616
302616

How September really feels in Bir el Ater

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.

Bir el Ater weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 173.79.93.5
Feb13° / 132.910.74.4
Mar17° / 254.611.76.2
Apr21° / 10°254.412.87.6
May26° / 15°19413.87.9
Jun31° / 19°92.614.35.5
Jul34° / 22°51.514.13.7
Aug34° / 22°102.913.34.1
Sep29° / 18°244.712.26.8
Oct23° / 13°234.311.18.0
Nov17° / 213.810.26.3
Dec12° / 153.29.74.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 63% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18911
28911
38812
48812
58614
68614
78614
88515
98416
108416
118317
128317
138218
148119
158020
167921
177921
187822
197822
207723
217624
227624
237624
247624
257624
267525
277525
287624
297624
307624

Chance of precipitation in September

Any precipitation

Bir el Ater gets around 24 mm of rain over 4.7 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 16% and peaks near 19% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
114
214
314
414
515
614
714
814
914
1014
1114
1214
1314
1414
1514
1615
1715
1815
1916
2016
2117
2217
2317
2418
2518
2619
2719
2819
2919
3019

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 57% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
153407
252417
352417
451418
551418
650419
751409
852399
953389
1053389
1154379
1255369
1356359
1457358
1558348
1658348
1758348
1859347
1959347
2059347
2159347
2261336
2361336
2461336
2561336
2662326
2762326
2863316
2963316
3064306

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:05 AM to 6:26 AM, and sunset from 6:50 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:056:50
212.76:056:49
312.76:066:48
412.76:076:46
512.66:086:45
612.66:086:43
712.56:096:42
812.56:106:40
912.56:106:39
1012.46:116:37
1112.46:126:36
1212.46:136:34
1312.36:136:33
1412.36:146:31
1512.36:156:30
1612.26:166:29
1712.26:166:27
1812.16:176:26
1912.16:186:24
2012.16:196:23
2112.06:196:21
2212.06:206:20
2312.06:216:18
2411.96:226:17
2511.96:226:15
2611.86:236:14
2711.86:246:12
2811.86:256:11
2911.76:266:09
3011.76:266:08

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 2.87 kWh/m² to a high of 7.67 kWh/m² in July across the year — September's 5.66 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.2Intense
36.2Intense
46.1Intense
56.1Intense
66.0Intense
76.0Intense
86.0Bright
95.9Bright
105.9Bright
115.9Bright
125.8Bright
135.8Bright
145.7Bright
155.7Bright
165.7Bright
175.6Bright
185.6Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.2Bright
275.2Bright
285.2Bright
295.1Bright
305.1Bright
Planning a trip in September

Hazard calendar for Bir el Ater

In seasonPeak

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

Bir el Ater 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 Bir el Ater?

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

6.8
Sightseeing
4th-best month of the year
7.9
Beach & pool
2nd-best month of the year

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

What to pack for Bir el Ater in September

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

In September, Bir el Ater sees daytime highs around 29°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in Bir el Ater 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 Bir el Ater peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 15UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr6High
May7Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Bir el Ater 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 Bir el Ater is worst in April — around 32 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 2131 µg/m³Dec 1722 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb22Moderate
Mar26Moderate
Apr32Moderate
May30Moderate
Jun31Moderate
Jul27Moderate
Aug27Moderate
Sep27Moderate
Oct27Moderate
Nov24Moderate
Dec22Moderate
Location & terrain

Where is Bir el Ater?

Bir el Ater sits at 34.7°N, 8.1°E, 889 m above sea level, in Algeria. The nearest listed city is Moularès, 34 km away.

Topography around Bir el Ater

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

Within 3 km, the terrain around Bir el Ater has only modest variations in elevation — a maximum elevation change of 177 m around an average of 883 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 731 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,731 m.

The land around Bir el Ater is covered by bare terrain (49%) and artificial surfaces (34%) within 3 km, bare terrain (62%) and grassland (32%) within 16 km, and bare terrain (56%) and grassland (27%) within 80 km.

3 km
177 m
16 km
731 m
80 km
1,731 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Moularès 34 km · Ar Rudayyif 41 km · Feriana 51 km · Metlaoui 57 km · Cheria 65 km · Tébessa 74 km · Gafsa 75 km · El Ksar 78 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 Bir el Ater (34.7449°, 8.0602°, elevation 889 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).