Climate Insights for Bannalec

The climate in Bannalec is temperate. The average annual temperature is 12°C and approximately 863mm of precipitation falls per year. Bannalec receives a notable amount of rainfall throughout the year, including during its driest month. Bannalec is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, March, when temperatures can drop to 4°C.

Bannalec sees moderate temperature variation throughout the year, ranging from 4°C to 22°C. July is the warmest month, though highs remain moderate at 22°C with a mean of 18°C. January is the coolest month, with minimum temperatures around 4°C and an average of 7°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between October and November, with a 3°C shift in average temperatures.

Bannalec is a moderately rainy area, receiving approximately 863mm of precipitation annually, which averages out to around 72mm per month. The wettest month is December, averaging 102mm of rainfall. November and January also tend to see above-average precipitation. The driest month is July, with just 43mm. That's 58mm less than December, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Bannalec is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 16km/h in winter, 15km/h in spring, 13km/h in summer, 15km/h in autumn.

It is currently autumn in Bannalec, which began on September 23, 2026. Bannalec 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 July at around 22°C, while the coldest stretch bottoms out in January near 4°C. Winter is next, beginning on December 21, 2026 (87 days from now).

The best time to visit Bannalec is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 52mm per month. By contrast, January can be quite cold with temperatures dropping to 4°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 Bannalec 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. 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.