Rio Branco
Sunrise and sunset in Rio Branco
Today’s sunrise, sunset and twilight in Rio Branco, in local time. At 10° S, the day lasts from 11 h 33 min at the winter solstice to 12 h 43 min at the summer solstice.
Today · worked out at
Wednesday, October 21: sunrise at 05:04, sunset at 17:27.
Day length 12 h 22 min, 32 s longer than yesterday.
Solar noon at 11:15, with the Sun 89° above the horizon.
Times are Rio Branco time (GMT-5).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 03:53 | 18:38 |
| Nautical twilight | 04:18 | 18:13 |
| Civil twilight | 04:43 | 17:48 |
| Sunrise and sunset | 05:04 | 17:27 |
| Golden hour | 05:04–05:32 | 16:58–17:27 |
Each twilight begins at the morning time and ends at the evening one.
The year in Rio Branco
- Longest day: December 21, 12 h 43 min, from sunrise at 05:08 to sunset at 17:50.
- Shortest day: June 21, 11 h 33 min, from sunrise at 05:46 to sunset at 17:19.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 05:24 | 18:00 | 12 h 36 min |
| February 21 | 05:33 | 17:55 | 12 h 22 min |
| March 21 | 05:35 | 17:41 | 12 h 06 min |
| April 21 | 05:35 | 17:24 | 11 h 50 min |
| May 21 | 05:39 | 17:16 | 11 h 37 min |
| June 21 | 05:46 | 17:19 | 11 h 33 min |
| July 21 | 05:49 | 17:26 | 11 h 37 min |
| August 21 | 05:39 | 17:29 | 11 h 50 min |
| September 21 | 05:21 | 17:27 | 12 h 06 min |
| October 21 | 05:04 | 17:27 | 12 h 22 min |
| November 21 | 04:58 | 17:35 | 12 h 37 min |
| December 21 | 05:08 | 17:50 | 12 h 43 min |
Good to know
- Sunrise and sunset are when the top of the Sun meets a level horizon, allowing for the usual bending of light by the air. Hills, buildings and height shift what you see by a few minutes.
- Civil, nautical and astronomical twilight end when the Sun is 6°, 12° and 18° below the horizon. Golden hour here is the photographers’ usual definition: the Sun less than 6° above it.
- Worked out when the page loads from NOAA’s solar equations, for 10° S, 67.8° W, and accurate to about a minute.
How the layers work, where their data comes from and what they can’t tell you: Day and night, live, The Sun, Moon and planets
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