Bolu Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Bolu.
Climate overview of Bolu
The climate in Bolu, Black Sea Region Turkey, Turkey, is marked by large temperature swings across the seasons, ranging from 26°C (79°F) in August to 4°C (39°F) in January.
The city receives considerable rain/snowfall, with around 1065 mm (42 in) annually. May is the wettest month.
Bolu Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Bolu — and find the best time to visit.
Monthly Temperature in Bolu
In Bolu, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a comfortable 26°C (79°F) in August to a chilly 4°C (39°F) in the coolest month, January.
Nights vary from 14°C (57°F) in August to around -4°C (25°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Bolu
Bolu experiences significant rain/snowfall throughout the year, averaging 1065 mm (42 in) of precipitation annually. The climate in Bolu shows significant variation throughout the year. Expect high rainfall in May, the wettest month, with an average of 118 mm (4.6 in) of precipitation over 14 rainy days.
In contrast, the driest month July offers drier and sunnier days, with around 52 mm (2 in) of rainfall over 6 rainy days. For more details, please visit our Bolu Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Bolu
Frequently asked questions about the climate in Bolu
What is the best time to visit Bolu?
July, August and September typically offer the most optimal weather in Bolu. In contrast, January, February, March and December tend to have less optimal conditions.
What temperatures can I expect in Bolu?
Daytime highs range from 4°C (39°F) in January to 26°C (79°F) in August. Nighttime lows range from -4°C (25°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Bolu get?
Annual rainfall is around 1065 mm (42 in). May is the wettest month with 118 mm (4.6 in), while July is the driest with 52 mm (2 in).
Bolu 3-Day Forecast
Bolu 3-Day Forecast
Bolu on the map
Bolu is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Antalya
34°C (93°F) Fethiye33°C (91°F) Oludeniz33°C (91°F) Side32°C (90°F) Alanya30°C (86°F) Alacati
29°C (84°F) Istanbul28°C (82°F) Trabzon
25°C (77°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
An idyllic and beautiful place to stay and eat near Saklikent National Park in Turkey
Serene Saklikent National Park near Fethiye, Turkey, with breathtaking gorges, tranquil restaurant, and unique experiences in nature. Perfect for a peaceful escape.
Sailing the Turquoise Coast: Discovering Turkey's Blue Voyage
Discover the beauty of Turkey's Turquoise Coast on a sailboat adventure, exploring ancient ruins, sun-soaked beaches, and lively harbor towns.
Balloon in Cappadocia Turkey
The best view of the special landscape of Cappadocia is from the air. It is a great idea to take a balloon trip at sunrise. An experience that belongs on your bucket list.
Istanbul, where East meets West
Istanbul, one of the most amazing cities in the world. It's a buzzing city and a mix of European and Asian, like a summer day in Madrid with a touch of Bangkok.