Climate Insights for Bayonne

The climate in Bayonne is temperate. The average annual temperature is 15°C and approximately 1359mm of precipitation falls per year. Bayonne receives a notable amount of rainfall throughout the year, including during its driest month. Bayonne 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 7°C.

Bayonne sees moderate temperature variation throughout the year, ranging from 7°C to 25°C. August is the warmest month, though highs remain moderate at 25°C with a mean of 21°C. January is the coolest month, with minimum temperatures around 7°C and an average of 9°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 4°C shift in average temperatures.

Bayonne is a fairly wet location, receiving approximately 1359mm of precipitation annually, which averages out to around 113mm per month. The wettest month is November, averaging 194mm of rainfall. December and January also tend to see above-average precipitation. The driest month is July, with just 52mm. That's 143mm less than November, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Bayonne is mildly breezy, 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 December, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/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 14km/h in winter, 12km/h in spring, 11km/h in summer, 12km/h in autumn.

It is currently autumn in Bayonne, which began on September 23, 2026. Bayonne 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 25°C, while the coldest stretch bottoms out in January near 7°C. Winter is next, beginning on December 21, 2026 (87 days from now).

The best time to visit Bayonne is during May, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 72mm per month. By contrast, January can be quite cold with temperatures dropping to 7°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Bayonne 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.