Key Summary- A narrow coastal strip enjoys a classic Mediterranean climate, with mild, rainy winters and hot, sunny summers.
- The towering Mount Lebanon range captures moisture and creates a sharp contrast between lush, snow-capped highlands and a much drier interior.
- Inland plateaus and valleys fall under a cold semi-arid climate, sitting in the rain shadow and experiencing stark temperature swings between seasons.
Lebanon’s small size masks an extraordinary climatic diversity that unfolds over very short distances, almost entirely sculpted by the country’s mountainous geography. The Mediterranean Sea provides the moisture source, while the Mount Lebanon range, running parallel to the coast, acts as a climatic wall. In our climate maps and charts at WeatherBox, you can see this backbone dividing the country into three main Köppen climate zones. The coastal lowlands and western slopes wear the Csa (hot-summer Mediterranean) code, where summers are warm to hot and almost completely dry, and virtually all precipitation arrives between November and March. Just a few kilometres inland, altitudes soar rapidly above 2,000 metres, pushing the high mountains into a Dsa (continental Mediterranean) zone with cold, snowy winters and pleasantly mild summers. Further east, beyond the peaks, the Bekaa Valley and Anti-Lebanon mountains drop into a BSk (cold semi-arid) climate, the product of a pronounced rain shadow that starves the interior of the generous moisture seen at the coast.
Seasonal rhythms are consistent across the country but play out very differently depending on where you stand. From December through February, westerly storm tracks sweep in off the Mediterranean, drenching the coastal cities in mild, rainy conditions while plastering the high peaks with deep snow that can linger into early summer. Coastal temperatures typically range from 10°C to 17°C (50°F to 63°F) during these wet months, while in the mountains, readings stay near or below freezing. When you travel into the interior, the winter air is noticeably colder, with frequent overnight frosts in the Bekaa Valley. The shift to the long, rainless summer arrives by June, as stubbornly high pressure settles over the region. Along the coast, heat and high humidity combine to push afternoon highs to 30°C (86°F) or more. The mountains offer a cooler escape, with comfortable mid‑20s Celsius (mid‑70s Fahrenheit), and the semi-arid interior endures very hot days tempered by rapid cooling after sunset. Our data at WeatherBox shows that the mountain snowpack acts as a critical natural reservoir, its meltwater sustaining rivers and agriculture through the parched summer months, a vivid link between climate, terrain and daily life.
