Byblos weather in December

In December, Byblos sees average daytime highs of 13°C and overnight lows near 5°C, with 109 mm of precipitation across 11.4 wet days and about 9.8 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 15°C in the first days to 12°C by the end. The sky is clear or mostly clear about 41% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of December to 9 h 48 min by month's end. Set against the rest of the year, December is Byblos's 10th-clearest and 5th-windiest month. For the whole year in context, see Byblos's year-round climate.

Daytime high
13°
10th warmest
Overnight low
3rd coldest
Precipitation
109 mm
11.4 wet days
Daylight
9 h 42 min
6:41 AM – 4:26 PM
Cloud cover
48%
10th clearest
Wind
8 km/h
5th windiest
Solar energy
2.6 kWh/m²
Travel score
3.7
out of 10

Byblos is Mediterranean city in the Mount Lebanon Governorate, Lebanon, a main Canaanite-Phoenician city.

Density
4,157/km²
people per km²
Founded
~8000 BCE

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 15°C in the first days to 12°C by the end.

A typical December day in Byblos reaches about 13°C in the afternoon and slips back to 5°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 17°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1157
2157
3157
4157
5146
6146
7146
8146
9146
10146
11136
12136
13136
14135
15135
16135
17135
18135
19125
20125
21125
22125
23125
24125
25125
26125
27124
28124
29124
30124
31124

Byblos weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan11° / 12613.73.6102.5
Feb11° / 121123.410.72.8
Mar14° / 9910.91.411.74.2
Apr18° / 497.10.212.86.3
May22° / 13°244.5013.88.1
Jun25° / 16°30.6014.29.3
Jul28° / 19°00.10148.8
Aug28° / 19°10.3013.38.3
Sep27° / 17°61.6012.28.8
Oct23° / 14°305.8011.18.1
Nov18° / 6980.310.26.2
Dec13° / 10911.41.49.83.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36040
45941
55941
65842
75842
85842
95842
105842
115842
125842
135842
145842
155842
165842
175842
185941
195941
206040
216040
226040
236040
245941
255941
265941
275842
285842
295743
305743
315545

Chance of precipitation in December

Any precipitationSnow

Byblos gets around 109 mm of rain and snow over 11.4 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 37% and peaks near 42% on the wettest days, and about 1 day brings snow. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1312
2322
3333
4343
5353
6363
7363
8374
9384
10384
11394
12394
13395
14395
15385
16385
17385
18375
19375
20375
21365
22365
23365
24365
25375
26385
27396
28406
29416
30427
31427

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 54 min at the start of December to 9 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:30 AM to 6:48 AM, and sunset from 4:24 PM to 4:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.96:304:24
29.96:314:24
39.96:324:24
49.86:334:24
59.86:344:24
69.86:354:24
79.86:354:24
89.86:364:24
99.86:374:24
109.86:384:24
119.86:384:24
129.86:394:25
139.86:404:25
149.76:404:25
159.76:414:25
169.76:414:26
179.76:424:26
189.76:434:26
199.76:434:27
209.76:444:27
219.76:444:28
229.76:454:28
239.76:454:29
249.76:464:29
259.76:464:30
269.76:464:30
279.76:474:31
289.76:474:31
299.76:474:32
309.76:484:33
319.86:484:33

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.6 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 8 kWh/m² in June across the year — December's 2.6 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.8Moderate
32.8Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.6Moderate
162.6Moderate
172.6Moderate
182.6Moderate
192.6Moderate
202.6Moderate
212.6Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in December

Hazard calendar for Byblos

In seasonPeak

In December, Byblos sits inside 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.

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

Is December a good time to visit Byblos?

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

3.7
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Byblos.

What to pack for Byblos in December

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

In December, Byblos sees daytime highs around 13°C and nights near 5°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Byblos in December

The nearest coast averages about 21°C in December — 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.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb17Cool
Mar17Cool
Apr19Cool
May21Refreshing
Jun25Warm
Jul27Warm
Aug28Tropical
Sep28Warm
Oct26Warm
Nov23Refreshing
Dec21Refreshing

UV index in Byblos in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3. 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 21UV 10Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun11Extreme
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Byblos in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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).

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorPoorModeratePoorUnhealthyNov 2258 µg/m³Jul 2231 µg/m³
PM2.5 (µg/m³)Level
Jan52Poor
Feb57Unhealthy
Mar52Poor
Apr54Poor
May44Poor
Jun35Poor
Jul31Moderate
Aug31Moderate
Sep41Poor
Oct51Poor
Nov58Unhealthy
Dec57Unhealthy
Location & terrain

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.

JouniehBeirutRa’s BayrūtAleyBsharriChmistârZahleTripoli

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.

3 km
494 m
16 km
1,768 m
80 km
3,068 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Jounieh 16 km · Beirut 29 km · Ra’s Bayrūt 29 km · Aley 35 km · Bsharri 36 km · Chmistâr 38 km · Zahle 38 km · Tripoli 39 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 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. 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).