Tripoli weather in September

In September, Tripoli sees average daytime highs of 27°C and overnight lows near 24°C, with 7 mm of rain across 1.4 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 26°C by the end. The sky is clear or mostly clear about 97% 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 Tripoli's 4th-clearest and 10th-windiest month. For the whole year in context, see Tripoli's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
24°
10th coldest
Rainfall
7 mm
1.4 wet days
Daylight
12 h 12 min
5:25 AM – 5:37 PM
Cloud cover
11%
4th clearest
Wind
13 km/h
10th windiest
Solar energy
5.82 kWh/m²
Travel score
8.8
out of 10

Tripoli is city in northern Lebanon.

Density
16,386/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 26°C by the end.

A typical September day in Tripoli reaches about 27°C in the afternoon and slips back to 24°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12825
22825
32725
42725
52725
62725
72724
82724
92724
102724
112724
122724
132724
142724
152724
162724
172724
182724
192724
202624
212623
222623
232623
242623
252623
262623
272623
282623
292623
302623

Tripoli 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° / 11°14614104.2
Feb15° / 11°12411.310.74.4
Mar16° / 13°939.311.75.5
Apr19° / 15°385.712.87.1
May22° / 19°162.813.88.5
Jun25° / 22°10.314.39.5
Jul27° / 25°00.114.19.1
Aug28° / 25°00.113.38.9
Sep27° / 24°71.412.28.8
Oct24° / 21°425.611.18.2
Nov20° / 17°898.710.26.9
Dec17° / 13°14512.49.75.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 97% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 2% of September, with mostly cloudy or overcast conditions the remaining 1%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
21991
22982
23982
24982
25982
26982
27982
28982
29973
30964

Chance of precipitation in September

Any precipitation

Tripoli gets around 7 mm of rain over 1.4 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 5% and peaks near 9% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
42
52
62
72
82
92
102
113
123
133
143
154
164
174
185
195
205
216
227
237
248
258
268
279
289
299
309

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101747432
201749412
301850392
401951372
501954351
6011055331
7011057311
8011158291
9021159271
10021259261
11021359251
12121361230
13121461220
14121561210
15121661200
16121761190
17121861180
18121961170
19132060160
20132160150
21232358140
22242457130
23242655130
24252754120
25352952110
26363051100
27373249100
2837344790
2937354680
3048374470

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 11 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
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
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 5:14 AM to 5:35 AM, and sunset from 5:59 PM to 5:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:145:59
212.75:145:58
312.75:155:56
412.65:165:55
512.65:175:53
612.65:175:52
712.55:185:50
812.55:195:49
912.55:195:48
1012.45:205:46
1112.45:215:45
1212.45:225:43
1312.35:225:42
1412.35:235:40
1512.25:245:39
1612.25:255:37
1712.25:255:36
1812.15:265:34
1912.15:275:33
2012.15:285:31
2112.05:285:30
2212.05:295:28
2312.05:305:27
2411.95:305:26
2511.95:315:24
2611.85:325:23
2711.85:335:21
2811.85:345:20
2911.75:345:18
3011.75:355:17

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.82 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 7.8 kWh/m² in June across the year — September's 5.82 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.4Intense
36.4Intense
46.3Intense
56.3Intense
66.3Intense
76.2Intense
86.2Intense
96.1Intense
106.1Intense
116.0Intense
126.0Intense
136.0Bright
145.9Bright
155.9Bright
165.8Bright
175.8Bright
185.7Bright
195.7Bright
205.6Bright
215.6Bright
225.5Bright
235.5Bright
245.4Bright
255.4Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.1Bright
Planning a trip in September

Hazard calendar for Tripoli

In seasonPeak

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

Tripoli's rainy season runs November–March, when most of the year's rain falls.

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

Is September a good time to visit Tripoli?

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

8.8
Sightseeing
4th-best month of the year
8.7
Beach & pool
3rd-best month of the year

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

What to pack for Tripoli in September

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

In September, Tripoli sees daytime highs around 27°C and nights near 24°C. Worth packing: light clothes and sun protection.

light clothessun protection

Sea temperature near Tripoli 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 21 km away) is warmest in August at about 28°C and coldest in February near 17°C.

It's comfortable for a long swim from May 4 to Dec 22 — about 7.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb17Cool
Mar17Cool
Apr18Cool
May21Refreshing
Jun25Warm
Jul27Warm
Aug28Tropical
Sep28Warm
Oct26Warm
Nov23Refreshing
Dec20Refreshing

UV index in Tripoli in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tripoli peaks around June 20 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 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 highExtremeVery highHighModerateJun 20UV 11Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Tripoli 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 Tripoli is worst in February — around 49 µg/m³ PM2.5 (poor), about 2.0× the cleanest month (July, 24 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorFeb 1948 µg/m³Jul 2324 µg/m³
PM2.5 (µg/m³)Level
Jan43Poor
Feb49Poor
Mar47Poor
Apr48Poor
May38Poor
Jun28Moderate
Jul24Moderate
Aug24Moderate
Sep30Moderate
Oct38Poor
Nov46Poor
Dec47Poor
Location & terrain

Where is Tripoli?

Tripoli sits at 34.4°N, 35.8°E, 51 m above sea level, in Lebanon. The nearest listed city is Bsharri, 25 km away.

BsharriByblosTallkalakhEl HermelJouniehChmistâr

Topography around Tripoli

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

Within 3 km, the terrain around Tripoli has only modest variations in elevation — a maximum elevation change of 135 m around an average of 43 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,293 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,079 m.

The land around Tripoli is covered by artificial surfaces (47%) and grassland (20%) within 3 km, water (49%) and trees (27%) within 16 km, and water (31%) and grassland (30%) within 80 km.

3 km
135 m
16 km
1,293 m
80 km
3,079 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Bsharri 25 km · Byblos 39 km · Tallkalakh 46 km · El Hermel 50 km · Şāfītā 50 km · Ţarţūs 51 km · Jounieh 54 km · Chmistâr 55 km

Lebanon travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type A / B / C / D / G
220 V · 50 Hz
Prices
≈ 38% of US
price level, 2024
GDP per capita
$4,473
2024
Happiness
3.7 / 10
World Happiness, 2025
Safe drinking water
48%
of population, 2024
Homicide rate
2.2
per 100k, 2020
Road deaths
16.4
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Low
EF EPI 477
Religion
Muslim 68%Christian 32%Druze 5%

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 Tripoli (34.4335°, 35.8441°, elevation 51 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).