July 21, 2026 · Vientiane, Laos
Sunset in Vientiane today is at 18:48. Day length is 13h 3m. See below for sunrise, solar noon, dawn and dusk — all times calculated astronomically for Vientiane's coordinates and updated daily.
Vientiane lies at 18°N. Near the tropics, day length stays close to 12 hours year-round, with only minor variation between seasons.
Sunset shifts later through spring and earlier through autumn — changing fastest near the equinoxes and slowest near the summer and winter solstices. See the year chart to visualise how sunset times shift month by month for Vientiane.
The longest day in Vientiane is around 13h 12m (around June 21). The shortest is around 11h 3m (around December 21). Days are currently getting shorter — losing about 1 minute per day.
| Month | Sunset | Sunrise | Day length |
|---|---|---|---|
| January | 17:54 | 06:45 | 11h 10m |
| February | 18:11 | 06:38 | 11h 33m |
| March | 18:20 | 06:19 | 12h 1m |
| April | 18:26 | 05:54 | 12h 32m |
| May | 18:36 | 05:38 | 12h 58m |
| June | 18:47 | 05:35 | 13h 12m |
| July | 18:49 | 05:43 | 13h 7m |
| August | 18:38 | 05:53 | 12h 45m |
| September | 18:14 | 05:58 | 12h 15m |
| October | 17:49 | 06:04 | 11h 45m |
| November | 17:34 | 06:16 | 11h 18m |
| December | 17:37 | 06:34 | 11h 4m |