Byblos in Fall
In fall (September, October and November), Byblos sees average daytime highs around 22°C and overnight lows near 13°C, with 106 mm of precipitation over about 15 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 28°C in early September to 16°C by late November. The sky is clear or mostly clear about 73% of the time across fall, and the air most often feels dry.
Fall is Byblos's 2nd-best season to visit on our travel score. For the whole year in context, see Byblos's year-round climate.
- Avg daytime high
- 22°C
- 2nd-warmest season
- Avg overnight low
- 13°C
- Precipitation
- 106 mm
- 15 wet days
- Avg wind
- 7 km/h
- Travel score
- 7.7
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Byblos in Fall
Over the season highs ease from about 28°C in early September to 16°C by late November.
A typical fall day in Byblos reaches about 22°C and drops to 13°C overnight. The warmest of the three months is September, the coolest November.
Byblos weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 11° / 3° | 126 | 13.7 | 3.6 | 10 | 2.5 |
| Feb | 11° / 4° | 121 | 12 | 3.4 | 10.7 | 2.8 |
| Mar | 14° / 6° | 99 | 10.9 | 1.4 | 11.7 | 4.2 |
| Apr | 18° / 9° | 49 | 7.1 | 0.2 | 12.8 | 6.3 |
| May | 22° / 13° | 24 | 4.5 | 0 | 13.8 | 8.1 |
| Jun | 25° / 16° | 3 | 0.6 | 0 | 14.2 | 9.3 |
| Jul | 28° / 19° | 0 | 0.1 | 0 | 14 | 8.8 |
| Aug | 28° / 19° | 1 | 0.3 | 0 | 13.3 | 8.3 |
| Sep | 27° / 17° | 6 | 1.6 | 0 | 12.2 | 8.8 |
| Oct | 23° / 14° | 30 | 5.8 | 0 | 11.1 | 8.1 |
| Nov | 18° / 9° | 69 | 8 | 0.3 | 10.2 | 6.2 |
| Dec | 13° / 5° | 109 | 11.4 | 1.4 | 9.8 | 3.7 |
Cloud cover in Fall
The sky is clear or mostly clear about 73% of the time across fall.
Chance of precipitation in Fall
Byblos gets around 106 mm of rain and snow over 15 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 7 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 42 min in early September to 9 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.6 kWh/m².
Hazard calendar for Byblos
In fall, Byblos overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Byblos's rainy season runs November–March, when most of the year's rain falls.
Is fall a good time to visit Byblos?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is one of the better times to visit Byblos for general sightseeing.
What to pack for Byblos in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Byblos sees daytime highs around 22°C and nights near 13°C. Pack sun protection. Worth having: light clothes and rain gear. About 15 days see rain.
Sea temperature near Byblos in Fall
The nearest coast averages about 26°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 28°C and coldest in February near 17°C.
It's comfortable for a long swim from May 3 to Dec 23 — about 7.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 19 | 17 | 17 | 19 | 21 | 25 | 27 | 28 | 28 | 26 | 23 | 21 |
| Comfort | Cool | Cool | Cool | Cool | Refreshing | Warm | Warm | Tropical | Warm | Warm | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 19 | Cool |
| Feb | 17 | Cool |
| Mar | 17 | Cool |
| Apr | 19 | Cool |
| May | 21 | Refreshing |
| Jun | 25 | Warm |
| Jul | 27 | Warm |
| Aug | 28 | Tropical |
| Sep | 28 | Warm |
| Oct | 26 | Warm |
| Nov | 23 | Refreshing |
| Dec | 21 | Refreshing |
UV index in Byblos in Fall
Clear-sky midday UV across fall averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Byblos peaks around June 21 at about 10 (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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 5 | 7 | 8 | 11 | 10 | 10 | 8 | 6 | 4 | 3 |
| Level | Moderate | Moderate | Moderate | High | Very high | Extreme | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Byblos in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Byblos is worst in November — around 58 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (July, 31 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 52 | 57 | 52 | 54 | 44 | 35 | 31 | 31 | 41 | 51 | 58 | 57 |
| Level | Poor | Unhealthy | Poor | Poor | Poor | Poor | Moderate | Moderate | Poor | Poor | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 52 | Poor |
| Feb | 57 | Unhealthy |
| Mar | 52 | Poor |
| Apr | 54 | Poor |
| May | 44 | Poor |
| Jun | 35 | Poor |
| Jul | 31 | Moderate |
| Aug | 31 | Moderate |
| Sep | 41 | Poor |
| Oct | 51 | Poor |
| Nov | 58 | Unhealthy |
| Dec | 57 | Unhealthy |
Where is Byblos?
Byblos sits at 34.1°N, 35.6°E, 33 m above sea level, in Lebanon. The nearest listed city is Jounieh, 16 km away.
Topography around Byblos
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Byblos.
Within 3 km, the terrain around Byblos has significant variations in elevation — a maximum elevation change of 494 m around an average of 90 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,768 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,068 m.
The land around Byblos is covered by water (41%), trees (29%) and artificial surfaces (21%) within 3 km, water (47%) and trees (37%) within 16 km, and grassland (35%) and water (34%) within 80 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
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 Byblos (34.1211°, 35.6481°, elevation 33 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.