Mostaganem weather in September

In September, Mostaganem sees average daytime highs of 26°C and overnight lows near 22°C, with 14 mm of rain across 2.8 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 63% of the time in September, and the air most often feels muggy.

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 Mostaganem's 4th-clearest and 9th-windiest month. For the whole year in context, see Mostaganem's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
14 mm
2.8 wet days
Daylight
12 h 12 min
6:47 AM – 7:01 PM
Cloud cover
35%
4th clearest
Wind
13 km/h
9th windiest
Solar energy
5.48 kWh/m²
Travel score
8.3
out of 10

Mostaganem is city in Mostaganem Province, Algeria.

Density
3,258/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 24°C by the end.

A typical September day in Mostaganem reaches about 26°C in the afternoon and slips back to 22°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12724
22724
32724
42723
52723
62723
72723
82723
92623
102623
112623
122623
132623
142623
152622
162622
172622
182622
192522
202522
212522
222522
232522
242522
252521
262521
272521
282521
292421
302421

Mostaganem weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan15° / 12°5089.85.1
Feb15° / 12°426.810.65.3
Mar17° / 13°426.311.76.1
Apr18° / 15°36612.96.9
May21° / 17°233.613.97.8
Jun24° / 21°40.914.49.1
Jul27° / 23°0014.29.0
Aug28° / 24°20.413.48.5
Sep26° / 22°142.812.28.3
Oct23° / 19°315.211.17.9
Nov19° / 16°688.510.16.5
Dec16° / 13°4679.65.8

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 14% of September, with mostly cloudy or overcast conditions the remaining 22%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18713
28614
38515
48515
58317
68218
78218
88020
98020
107921
117822
127723
137723
147723
157624
167525
177525
187525
197426
207426
217426
227426
237426
247426
257426
267426
277426
287426
297426
307426

Chance of precipitation in September

Any precipitation

Mostaganem gets around 14 mm of rain over 2.8 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 9% and peaks near 12% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
13
24
34
44
55
65
76
86
96
107
117
128
138
148
159
169
179
1810
1910
2011
2111
2211
2312
2412
2512
2612
2712
2812
2912
3012

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 49% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100743454
201845443
301946423
4011047402
5011148392
6011249371
7011350351
8011451331
9011650321
10021750311
11021851290
12021951280
13032149270
14032149260
15042248250
16042348240
17052448230
18052548220
19062648210
20062648190
21072748180
22072848170
23072849160
24082949140
25082950130
26092950120
27093050110
28093051100
2909315190
30110315080

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

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 6:35 AM to 6:59 AM, and sunset from 7:23 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:357:23
212.86:367:22
312.76:377:20
412.76:387:19
512.66:397:17
612.66:397:16
712.66:407:14
812.56:417:13
912.56:427:11
1012.56:437:10
1112.46:437:08
1212.46:447:07
1312.36:457:05
1412.36:467:04
1512.36:467:02
1612.26:477:01
1712.26:486:59
1812.16:496:58
1912.16:506:56
2012.16:506:55
2112.06:516:53
2212.06:526:51
2312.06:536:50
2411.96:546:48
2511.96:546:47
2611.86:556:45
2711.86:566:44
2811.86:576:42
2911.76:586:41
3011.76:596:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.48 kWh/m².

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 7.6 kWh/m² in June across the year — September's 5.48 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.0Intense
66.0Bright
75.9Bright
85.9Bright
95.8Bright
105.8Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.4Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.8Bright
Planning a trip in September

Hazard calendar for Mostaganem

In seasonPeak

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

Mostaganem sees seasonal dust haze (July–August), heaviest in July.

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

Is September a good time to visit Mostaganem?

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

8.3
Sightseeing
4th-best month of the year
7.9
Beach & pool
3rd-best month of the year

September is one of the better times to visit Mostaganem for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mostaganem in September

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

In September, Mostaganem sees daytime highs around 26°C and nights near 22°C. Worth packing: light clothes and sun protection.

light clothessun protection

Sea temperature near Mostaganem in September

The nearest coast averages about 24°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 20 km away) is warmest in August at about 25°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 7 to Nov 1 — about 4.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug25Warm
Sep24Refreshing
Oct21Refreshing
Nov19Cool
Dec17Cool

UV index in Mostaganem in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mostaganem peaks around July 18 at about 9 (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 highHighModerateJul 18UV 9Dec 19UV 2
UV index (midday)Level
Jan3Moderate
Feb3Moderate
Mar7High
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug8Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Mostaganem 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 Mostaganem is worst in March — around 26 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (June, 16 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1625 µg/m³Jun 916 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb21Moderate
Mar26Moderate
Apr20Moderate
May16Moderate
Jun16Moderate
Jul19Moderate
Aug19Moderate
Sep22Moderate
Oct20Moderate
Nov17Moderate
Dec18Moderate
Location & terrain

Where is Mostaganem?

Mostaganem sits at 35.9°N, 0.1°E, 102 m above sea level, in Algeria. The nearest listed city is Arzew, 38 km away.

Topography around Mostaganem

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

Within 3 km, the terrain around Mostaganem has only modest variations in elevation — a maximum elevation change of 197 m around an average of 85 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 401 m; within 80 km, large variations in elevation — a maximum elevation change of 1,012 m.

The land around Mostaganem is covered by artificial surfaces (45%) and water (25%) within 3 km, water (43%) and cropland (31%) within 16 km, and cropland (33%), water (32%) and grassland (24%) within 80 km.

3 km
197 m
16 km
401 m
80 km
1,012 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Arzew 38 km · Aïn el Bya 38 km · Mohammadia 38 km · Relizane 47 km · Gdyel 49 km · Sig 52 km · Assi Bou Nif 59 km · Mascara 60 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 Mostaganem (35.9312°, 0.0892°, elevation 102 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).