Today, Saturday, October 3, 2026, the Sun rises at 05:07 and sets at 17:21 in Alto Boa Vista (MT), local time UTC-4. Daylight lasts 12h 13min, 39s more than yesterday.
The Sun today in Alto Boa Vista
It's daytime now Sunset in 5h 31min.
Compared with yesterday, today is 39s longer, and tomorrow will be 39s longer than today: in Alto Boa Vista the days are getting longer, heading toward the December 21 solstice. Solar noon, when the Sun crosses the local meridian, falls at 11:14, which is 46 minutes before 12:00 on the clock. That gap comes from the position of Alto Boa Vista inside its time zone (UTC-4) and from the equation of time, which moves solar noon by up to 16 minutes through the year.
Twilight and golden hour
| Phase | Time |
|---|---|
| Civil twilight begins | 04:46 |
| Morning golden hour | 05:07 – 05:35 |
| Sunrise | 05:07 |
| Solar noon | 11:14 |
| Evening golden hour | 16:53 – 17:21 |
| Sunset | 17:21 |
| Civil twilight ends | 17:42 |
In Alto Boa Vista civil twilight lasts 21 minutes at each end of the day today, so it is light enough to walk outdoors from 04:46 to 17:42. The golden hour, when the Sun is less than 6° above the horizon and the light is soft and warm, lasts about 28 minutes in the morning and 28 minutes in the evening (photographers also use it for the best light on landscapes and portraits).
Next 7 days
| Date | Sunrise | Sunset | Length | Change |
|---|---|---|---|---|
| Sat, Oct 3 | 05:07 | 17:21 | 12h 13min | +39s |
| Sun, Oct 4 | 05:07 | 17:21 | 12h 14min | +39s |
| Mon, Oct 5 | 05:06 | 17:21 | 12h 14min | +39s |
| Tue, Oct 6 | 05:05 | 17:21 | 12h 15min | +39s |
| Wed, Oct 7 | 05:05 | 17:21 | 12h 16min | +38s |
| Thu, Oct 8 | 05:04 | 17:21 | 12h 16min | +39s |
| Fri, Oct 9 | 05:04 | 17:21 | 12h 17min | +39s |
Day length through the year in Alto Boa Vista
View data table
| Month | Day length |
|---|---|
| January | 12h 43min |
| February | 12h 28min |
| March | 12h 09min |
| April | 11h 50min |
| May | 11h 34min |
| June | 11h 26min |
| July | 11h 30min |
| August | 11h 43min |
| September | 12h 01min |
| October | 12h 21min |
| November | 12h 39min |
| December | 12h 48min |
How day length changes through the year in Alto Boa Vista
| Key date | Date | Sunrise | Sunset | Length |
|---|---|---|---|---|
| March equinox (start of autumn) | March 20 | 05:29 | 17:36 | 12h 6min |
| June solstice (start of winter) | June 21 | 05:44 | 17:10 | 11h 26min |
| September equinox (start of spring) | September 22 | 05:15 | 17:21 | 12h 6min |
| December solstice (start of summer) | December 21 | 04:59 | 17:48 | 12h 48min |
The longest days in Alto Boa Vista come around December, with 12h 48min of daylight, and the shortest around June, with 11h 26min. The seasonal swing is 1h 22min, a modest change typical of the tropics (11.67° S).
Time zone and comparison with the state capital
Alto Boa Vista uses 1 hour behind Brasília (UTC-4). This is the Amazon time zone, used in the states of Mato Grosso, Mato Grosso do Sul, Rondônia, Roraima and most of Amazonas. Compared with Cuiabá, the state capital (670 km away), the Sun rises 18 min earlier on the clock and sets 20 min earlier. Today's daylight is 12h 13min here versus 12h 16min in Cuiabá.
Moon today
Today the Moon is Last Quarter, with about 46% of its disc lit and an age of 22.5 days. See the full moon calendar.
Alto Boa Vista at a glance
- StateMato Grosso (MT)
- Coordinates11.67° S, 51.39° W
- Time zoneUTC-4 (America/Porto_Velho)
- Area code (DDD)66
- IBGE code5100359
- Difference from Brasília1 hour behind Brasília
Cities near Alto Boa Vista
| City | Distance | Sunrise | Sunset |
|---|---|---|---|
| Serra Nova Dourada | 46 km | 05:07 | 17:21 |
| Bom Jesus do Araguaia | 57 km | 05:08 | 17:22 |
| São Félix do Araguaia | 78 km | 05:05 | 17:18 |
| Novo Santo Antônio | 82 km | 05:06 | 17:19 |
| Canabrava do Norte | 83 km | 05:09 | 17:22 |
| Porto Alegre do Norte | 93 km | 05:09 | 17:22 |
See also
- Sunrise and sunset in Mato Grosso and all its cities
- Sunrise and sunset in Cuiabá, the capital of Mato Grosso
- Current time in Mato Grosso
- Sunrise and sunset in every state and country · Start of the seasons
Times are calculated astronomically for the urban centre and are accurate to about a minute; sunrise and sunset use the upper edge of the Sun and atmospheric refraction. Hills and buildings can change the visible time.