Climate Insights for Bilecik

The climate in Bilecik is temperate. The average annual temperature is 14°C and approximately 529mm of precipitation falls per year. January is the wettest month, receiving around 70mm of rainfall. Bilecik is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to -1°C. Snowfall occurs from January to December, with around 53cm accumulating over the season.

Temperatures in Bilecik vary considerably across the year, with a 33°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 32°C and the mean temperature sits around 24°C. The coldest month is January, when overnight lows fall to -1°C and the daily average is 3°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 5°C shift in average temperatures.

Bilecik is a relatively dry area, receiving approximately 529mm of precipitation annually, which averages out to around 44mm per month. The wettest month is January, averaging 70mm of rainfall. March and May also tend to see above-average precipitation. The driest month is July, with just 15mm. That's 56mm less than January, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 53cm accumulating over the season. January typically sees the most snow at around 20cm.

Bilecik is relatively calm, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 10km/h in winter, 12km/h in spring, 14km/h in summer, 11km/h in autumn.

It is currently spring in Bilecik, which began on March 20, 2026. Bilecik is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 32°C, while the coldest stretch bottoms out in January near -1°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Bilecik is during May, June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 30mm per month. By contrast, January can be quite cold with temperatures dropping to -1°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Bilecik based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.