Boulogne-Billancourt expects a partly cloudy sky on Friday, June 5, 2026. The morning will start with a partly cloudy sky with 12 °C, before a brief clearing around 8 am, then a rapid return of significant cloudiness in the late morning. The temperature will rise steadily to 16 °C by 11 am, while the humidity, high at dawn, will decrease gradually. The wind will remain moderate, around 10 km/h, with gusts of 25 to 30 km/h, turning from southwest to west, then west-southwest. In the afternoon, the sky will remain generally cloudy in the continuation of the late morning, with a brief period of light rain in mid-day, before a return of more marked cloudiness. The temperatures will rise slowly from 16 to 19 °C in mid-afternoon, then decrease slightly to 18 °C in the late afternoon. The wind, initially oriented west-southwest then south-southwest, will strengthen occasionally to 15 km/h, with gusts reaching 35 km/h. The humidity will remain moderate. In the evening, the conditions will follow the afternoon, with a temperature stable around 19 °C until the beginning of the night, then a progressive decrease to 16 °C by 23 pm. The sky, initially very cloudy, will become more covered, leaving room for a continuous veil in altitude. The wind will blow generally at 5 km/h, with a passage to 10 km/h, and gusts reaching 25 km/h, oriented from west-northwest to south-southwest. The humidity will increase moderately over the hours. During the night, the weather will keep the same characteristics, with a temperature stable around 15 °C, without significant decrease between midnight and dawn. The wind will strengthen gradually, passing from 5 km/h with gusts to 10 km/h at the beginning of the night to 10 km/h with gusts reaching 25 km/h from 3 am, initially oriented south, then south-southeast before returning south. The sky will remain largely covered, after a brief veil of high clouds at the beginning of the period, while the humidity will decrease slightly. During the day of Saturday, in the continuation of this soft and covered night, the temperature will evolve gradually from around 15 °C in the morning to 21 °C in the late afternoon. The wind will strengthen significantly, passing from a flow of south-southeast to 10 to 15 km/h in the morning to a wind of southwest then west-southwest reaching 30 to 35 km/h, with gusts up to 50 km/h. The sky, very cloudy and humid in the morning, will leave room for lightning.