July 21, 2026 · Boulogne-Billancourt, France
Sunrise in Boulogne-Billancourt today is at 06:11. Day length is 15h 35m. See below for sunset, solar noon, dawn and dusk — all times calculated astronomically for Boulogne-Billancourt's coordinates and updated daily.
Boulogne-Billancourt lies at 49°N. At this latitude, day length varies significantly through the year — from roughly 7–8 hours in midwinter to 16–17 hours at midsummer.
Sunrise shifts earlier through spring and later through autumn — changing fastest near the equinoxes and barely at all near the summer and winter solstices. See the year chart to visualise how sunrise and sunset times shift month by month for Boulogne-Billancourt.
The longest day in Boulogne-Billancourt is around 16h 11m (around June 21). The shortest is around 8h 15m (around December 21). Days are currently getting shorter — losing about 2 minutes per day.
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 08:40 | 17:22 | 8h 42m |
| February | 08:01 | 18:12 | 10h 11m |
| March | 07:06 | 18:56 | 11h 50m |
| April | 07:01 | 20:42 | 13h 41m |
| May | 06:11 | 21:26 | 15h 15m |
| June | 05:48 | 21:57 | 16h 9m |
| July | 06:04 | 21:51 | 15h 47m |
| August | 06:44 | 21:09 | 14h 25m |
| September | 07:28 | 20:07 | 12h 38m |
| October | 08:11 | 19:04 | 10h 52m |
| November | 08:00 | 17:13 | 9h 12m |
| December | 08:38 | 16:55 | 8h 17m |