Sig weather in September

In September, Sig sees average daytime highs of 30°C and overnight lows near 19°C, with 19 mm of rain across 3.7 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 32°C in the first days to 28°C by the end. The sky is clear or mostly clear about 59% of the time in September, and the air most often feels humid.

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 Sig's 4th-clearest and 10th-windiest month. For the whole year in context, see Sig's year-round climate.

Daytime high
30°
4th warmest
Overnight low
19°
10th coldest
Rainfall
19 mm
3.7 wet days
Daylight
12 h 12 min
6:48 AM – 7:02 PM
Cloud cover
38%
4th clearest
Wind
7 km/h
10th windiest
Solar energy
5.51 kWh/m²
Travel score
6.0
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 28°C by the end.

A typical September day in Sig reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, September runs about 4°C cooler than August and about 4°C warmer than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13321
23221
33220
43220
53220
63220
73220
83120
93120
103119
113119
123119
133019
143019
153019
163019
173018
183018
192918
202918
212918
222918
232918
242918
252917
262817
272817
282817
292817
302817

How September really feels in Sig

Once humidity and wind are folded in, September averages 5 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
5
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.

Sig weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan16° / 438.19.95.6
Feb17° / 397.210.76.1
Mar20° / 43711.76.9
Apr22° / 11°406.512.97.5
May26° / 15°274.313.87.9
Jun30° / 18°71.414.46.3
Jul34° / 21°10.114.24.2
Aug34° / 22°60.813.34.0
Sep30° / 19°193.712.26.0
Oct26° / 15°325.511.17.7
Nov20° / 11°517.410.16.9
Dec17° / 386.79.66.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% 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 (%)
18515
28416
38317
48218
58218
68020
77921
87822
97723
107624
117624
127426
137426
147327
157327
167228
177228
187129
197030
207030
217030
226931
236931
247030
257030
267030
277030
287030
297129
307129

Chance of precipitation in September

Any precipitation

Sig gets around 19 mm of rain over 3.7 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 11% and peaks near 16% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
15
25
36
46
57
67
78
89
99
109
1110
1210
1311
1411
1512
1612
1713
1813
1914
2014
2115
2215
2315
2415
2515
2615
2715
2816
2916
3016

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
182134307
282235296
382235296
492336285
592336275
6102436264
7102436264
8112435254
9122535253
10132534253
11142633243
12152632242
13162632242
14172631232
15182731232
16182731222
17182831221
18192831211
19192931201
20192931191
21193032181
22203032171
23203133161
24203233150
25203233140
26213334130
27213434110
28223434100
2922353390
3023363380

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 6:37 AM to 7:00 AM, and sunset from 7:24 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:377:24
212.86:387:23
312.76:387:21
412.76:397:20
512.66:407:18
612.66:417:17
712.66:427:15
812.56:427:14
912.56:437:12
1012.46:447:11
1112.46:457:09
1212.46:457:08
1312.36:467:06
1412.36:477:05
1512.36:487:03
1612.26:487:02
1712.26:497:00
1812.16:506:59
1912.16:516:57
2012.16:526:56
2112.06:526:54
2212.06:536:53
2312.06:546:51
2411.96:556:50
2511.96:566:48
2611.86:566:47
2711.86:576:45
2811.86:586:44
2911.76:596:42
3011.77:006:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.51 kWh/m².

For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 7.62 kWh/m² in June across the year — September's 5.51 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.2Intense
36.2Intense
46.1Intense
56.1Intense
66.0Intense
76.0Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.7Bright
135.7Bright
145.6Bright
155.5Bright
165.5Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
285.0Bright
294.9Bright
304.9Bright
Planning a trip in September

Hazard calendar for Sig

In seasonPeak

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

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

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

Is September a good time to visit Sig?

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

6.0
Sightseeing
9th-best month of the year
8.1
Beach & pool
2nd-best month of the year

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

What to pack for Sig in September

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

In September, Sig sees daytime highs around 30°C and nights near 19°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Sig 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 39 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 Sig 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 Sig 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
Apr7High
May8Very high
Jun8Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Sig 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 Sig is worst in September — around 31 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1530 µg/m³May 2321 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb26Moderate
Mar30Moderate
Apr25Moderate
May21Moderate
Jun21Moderate
Jul26Moderate
Aug28Moderate
Sep31Moderate
Oct27Moderate
Nov23Moderate
Dec23Moderate
Location & terrain

Where is Sig?

Sig sits at 35.5°N, 0.2°W, 62 m above sea level, in Algeria. The nearest listed city is Mohammadia, 25 km away.

Topography around Sig

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

Within 3 km, the terrain around Sig has significant variations in elevation — a maximum elevation change of 384 m around an average of 98 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 738 m; within 80 km, large variations in elevation — a maximum elevation change of 1,197 m.

The land around Sig is covered by grassland (29%), cropland (23%) and trees (20%) within 3 km, grassland (41%) and cropland (33%) within 16 km, and cropland (42%), grassland (23%) and water (20%) within 80 km.

3 km
384 m
16 km
738 m
80 km
1,197 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Mohammadia 25 km · Bou Hanifia el Hamamat 27 km · Aïn el Bya 32 km · Sfizef 33 km · Sidi ech Chahmi 33 km · Assi Bou Nif 33 km · Mascara 34 km · ’Aïn el Berd 34 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 Sig (35.5283°, -0.1937°, elevation 62 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).