How to Prepare for the Caucasus Climate: Clothing and Tips by Season

The climate of the Caucasus is one of the most variable and contrasting in the world. In a single day you can go from the subtropical heat of a valley to sub-zero temperatures on a glacier at 3,000 metres altitude. This climatic diversity — the result of the region's complex geography of mountains, seas and valleys — makes good preparation essential to get the most out of your trip.

Factors that determine the Caucasus climate

Three main factors explain the region's climatic diversity:

• Altitude: Temperature drops approximately 6°C per 1,000 metres of altitude. On the highest peaks (5,000 m) temperatures can reach -20°C even in summer.
• Proximity to the sea: The coastal areas of the Black Sea (western Georgia) are the wettest and mildest. The Caspian Sea (Baku) creates a drier, more extreme climate.
• Slope orientation: South-facing slopes are warmer and drier; north-facing slopes are colder and wetter.

What to wear by season

Spring (March–May): light layering system

Spring in the Caucasus is the season of climatic surprises: a sunny, warm day can be followed by a cloudy, rainy one. The essentials: quick-dry T-shirts, fleece, waterproof jacket and light windbreaker. Hiking boots for excursions. In the mountains, add light gloves and a hat for cold mornings.

Summer (June–August): cool in the mountains, hot in the cities

In the cities (Tbilisi, Yerevan, Baku), summers are hot: light, breathable clothing in linen or technical cotton. Don't underestimate the mountains: even in July, above 2,500 metres temperatures can drop below 10°C at night. Always carry a waterproof jacket and a mid-layer. SPF 50+ sunscreen is essential at high altitude.

Autumn (September–November): the most comfortable season

September and October are the most pleasant months for travel: cool temperatures (15–22°C in valleys), clear skies and exceptional colours in the forests. Kit: mid-layers, waterproof jacket, sturdy hiking boots. In November the weather deteriorates quickly; bring extra warm clothing.

Winter (December–February): intense cold and snow

Winter in the cities is cold but bearable (0–5°C in Tbilisi and Yerevan). In the mountains and ski resorts temperatures drop to -15 to -20°C. Essentials: down jacket, fleece, thermal base layers, waterproof gloves, hat and scarf, waterproof boots with non-slip soles.

Practical tips for adapting to the climate

Hydration at altitude

Above 2,000 metres, hydration is essential. The body dehydrates faster at altitude, even in cold conditions. Drink at least 2–3 litres of water per day during mountain activities.

Check the forecast before every excursion

The weather in the Caucasus can change within hours. Before any mountain excursion, check the local weather forecast (apps like Mountain Forecast or Meteoblue are useful). Do not set out if there is a risk of thunderstorms; at high altitude they are particularly dangerous.

Beware of high-altitude sun

UV radiation is much more intense at high altitudes. At 3,000 metres, UV intensity is approximately double that at sea level. Use SPF 50+ sunscreen, UV400-filter sunglasses and cover your head even on cloudy days.

To plan when to travel, consult our guide to the best times to visit the Caucasus.

Frequently Asked Questions

What is the average temperature in Tbilisi throughout the year?

Tbilisi has a humid continental climate. Average temperatures range from 2°C in January to 28°C in July–August. Springs and autumns are mild (15–22°C). Rainfall is moderate and spread throughout the year, with peaks in May and October. Summer can be very hot and humid in August.

What to do if caught by a mountain storm in the Caucasus?

Descend to a lower altitude as quickly as possible, avoid ridges and exposed high ground. Seek shelter in low, sheltered areas, never under isolated trees. If there is lightning, move away from metal objects (trekking poles, a rucksack with a metal frame) and crouch down with feet together. Always inform someone of your route before setting out.

Is Baku very cold in winter?

Baku has the mildest winter of the three countries, with average temperatures of 4–8°C in December–February. The north wind (the "khazris") can make the wind-chill feel much colder. Snow in the city centre is rare. For mountain activities or the interior regions of Azerbaijan, the cold is more intense.