Average temperatures, rainfall, sunshine and the best time to visit Bolu.
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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. It has warm summers and cold winters.
Pick a month to see the average temperature, rainfall and sunshine in Bolu - and find the best time to visit.
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.
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.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
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. Bolu has warm summers and cold winters.
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.
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 is highlighted - select any city to see its climate.
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