Zarzis weather in September

In September, Zarzis sees average daytime highs of 28°C and overnight lows near 25°C, with 16 mm of rain across 1.8 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 27°C by the end. The sky is clear or mostly clear about 76% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Zarzis's 4th-clearest and 8th-windiest month. For the whole year in context, see Zarzis's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
25°
10th coldest
Rainfall
16 mm
1.8 wet days
Daylight
12 h 12 min
6:04 AM – 6:16 PM
Cloud cover
25%
4th clearest
Wind
18 km/h
8th windiest
Solar energy
5.58 kWh/m²
Travel score
7.5
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 27°C by the end.

A typical September day in Zarzis reaches about 28°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 32°C. Set against its neighbours, September runs about 1°C cooler than August and about 3°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12926
22926
32926
42926
52926
62926
72926
82926
92926
102925
112925
122925
132925
142925
152925
162825
172825
182825
192825
202825
212825
222825
232824
242824
252824
262824
272824
282724
292724
302724

How September really feels in Zarzis

Once humidity and wind are folded in, September averages 4 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
4
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.

Zarzis weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan16° / 12°193.3106.1
Feb16° / 12°162.910.86.4
Mar18° / 14°132.211.77.4
Apr20° / 16°81.612.88.2
May23° / 19°30.813.78.9
Jun26° / 22°10.114.29.1
Jul29° / 25°00148.0
Aug30° / 26°10.213.27.2
Sep28° / 25°161.812.27.5
Oct26° / 22°253.711.28.1
Nov21° / 17°243.910.37.9
Dec18° / 13°264.69.86.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 76% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1964
2955
3955
4955
5937
6937
7937
8937
9928
10919
11919
12919
13919
149010
158911
168911
178911
188713
198713
208614
218614
228416
238416
248317
258218
268218
278119
288020
297921
307921

Chance of precipitation in September

Any precipitation

Zarzis gets around 16 mm of rain over 1.8 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 6% and peaks near 12% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
43
53
63
73
83
93
103
113
124
134
144
154
164
175
185
196
207
217
228
239
249
2510
2610
2711
2812
2912
3012

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 84% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1004305313
2005315113
3005315113
4006315013
5007314912
6017324812
7018324712
8019334612
9019334511
100110344510
110110344410
12011135449
13011136438
14021236428
15021237427
16021338416
17021338406
18121439405
19121440394
20131540384
21131640373
22141640363
23141740353
24151840342
25151939332
26262039322
27262138312
28272238301
29272337291
30382437271

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 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 60 minutes over September. Sunrise moves from 5:53 AM to 6:14 AM, and sunset from 6:37 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:536:37
212.75:546:36
312.75:556:34
412.65:556:33
512.65:566:32
612.65:576:30
712.55:586:29
812.55:586:27
912.55:596:26
1012.46:006:25
1112.46:006:23
1212.36:016:22
1312.36:026:20
1412.36:026:19
1512.26:036:17
1612.26:046:16
1712.26:046:15
1812.16:056:13
1912.16:066:12
2012.16:076:10
2112.06:076:09
2212.06:086:07
2312.06:096:06
2411.96:096:05
2511.96:106:03
2611.86:116:02
2711.86:116:00
2811.86:125:59
2911.76:135:57
3011.76:145:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.58 kWh/m².

For context, solar energy here swings from a low near 2.85 kWh/m² to a high of 7.62 kWh/m² in July across the year — September's 5.58 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.0Intense
66.0Intense
76.0Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.8Bright
135.7Bright
145.7Bright
155.6Bright
165.6Bright
175.6Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.3Bright
235.3Bright
245.2Bright
255.2Bright
265.1Bright
275.1Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Zarzis

In seasonPeak

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

Zarzis sees seasonal dust haze (April–June), heaviest in April.

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

Is September a good time to visit Zarzis?

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

7.5
Sightseeing
7th-best month of the year
8.8
Beach & pool
3rd-best month of the year

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

What to pack for Zarzis in September

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

In September, Zarzis sees daytime highs around 28°C and nights near 25°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Zarzis in September

The nearest coast averages about 28°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 14 km away) is warmest in August at about 28°C and coldest in February near 15°C.

It's comfortable for a long swim from May 13 to Dec 5 — about 6.8 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar16Cool
Apr18Cool
May20Refreshing
Jun23Refreshing
Jul27Warm
Aug28Tropical
Sep28Warm
Oct25Warm
Nov22Refreshing
Dec19Cool

UV index in Zarzis 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 Zarzis peaks around June 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highVery highHighModerateJun 20UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr6High
May7High
Jun10Extreme
Jul9Very high
Aug9Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Zarzis 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 Zarzis is worst in January — around 33 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (July, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateJan 1832 µg/m³Jul 2210 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb28Moderate
Mar29Moderate
Apr27Moderate
May19Moderate
Jun15Moderate
Jul10Good
Aug11Good
Sep14Moderate
Oct19Moderate
Nov24Moderate
Dec25Moderate
Location & terrain

Where is Zarzis?

Zarzis sits at 33.5°N, 11.1°E, 11 m above sea level, in Tunisia. The nearest listed city is Midoun, 36 km away.

DjerbaMedenineMarethTataouine

Topography around Zarzis

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

Within 3 km, the terrain around Zarzis has only modest variations in elevation — a maximum elevation change of 50 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 75 m; within 80 km, significant variations in elevation — a maximum elevation change of 466 m.

The land around Zarzis is covered by artificial surfaces (47%) and water (42%) within 3 km, water (56%) within 16 km, and water (46%) and bare terrain (37%) within 80 km.

3 km
50 m
16 km
75 m
80 km
466 m
grasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Midoun 36 km · El Mgarsa 37 km · Ajim 41 km · Ben Gardane 42 km · Djerba 48 km · Medenine 59 km · Mareth 78 km · Tataouine 89 km

Tunisia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$4,657
2025
Happiness
4.8 / 10
World Happiness, 2025
Safe drinking water
65%
of population, 2024
Homicide rate
4.7
per 100k, 2020
Road deaths
16.5
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Low
EF EPI 498
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 Zarzis (33.504°, 11.1121°, elevation 11 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).