Byblos in Summer
In summer (June, July and August), Byblos sees average daytime highs around 27°C and overnight lows near 18°C, with 4 mm of rain over about 1 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 24°C in early June to 28°C by late August. The sky is clear or mostly clear about 97% of the time across summer, and the air most often feels comfortable.
Summer is Byblos's best season of the year to visit on our travel score. For the whole year in context, see Byblos's year-round climate.
- Avg daytime high
- 27°C
- warmest season of the year
- Avg overnight low
- 18°C
- Rainfall
- 4 mm
- 1 wet days
- Avg wind
- 8 km/h
- Travel score
- 8.8
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Byblos in Summer
Over the season highs climb from about 24°C in early June to 28°C by late August.
A typical summer day in Byblos reaches about 27°C and drops to 18°C overnight. The warmest of the three months is August, the coolest June.
Byblos weather by month
How the three summer months (June, July and August) 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 Summer
The sky is clear or mostly clear about 97% of the time across summer.
Chance of precipitation in Summer
Byblos gets around 4 mm of rain over 1 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 8 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 06 min in early June to 12 h 48 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.7 kWh/m².
Hazard calendar for Byblos
None of Byblos's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Byblos's rainy season runs November–March, when most of the year's rain falls.
Is summer a good time to visit Byblos?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Byblos for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Byblos in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Byblos sees daytime highs around 27°C and nights near 18°C. Pack light clothes and sun protection.
Sea temperature near Byblos in Summer
The nearest coast averages about 27°C across summer — 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 Summer
Clear-sky midday UV across summer averages around 10 (very high — sun protection essential). 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 Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer 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.