Today, Saturday, October 3, 2026, the Sun rises at 05:42 and sets at 17:55 in Riacho Frio (PI), local time UTC-3. Daylight lasts 12h 12min, 34s more than yesterday.
The Sun today in Riacho Frio
It's daytime now Sunset in 4h 49min.
Compared with yesterday, today is 34s longer, and tomorrow will be 33s longer than today: in Riacho Frio the days are getting longer, heading toward the December 21 solstice. Solar noon, when the Sun crosses the local meridian, falls at 11:48, which is 12 minutes before 12:00 on the clock. That gap comes from the position of Riacho Frio inside its time zone (UTC-3) 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 | 05:21 |
| Morning golden hour | 05:42 – 06:10 |
| Sunrise | 05:42 |
| Solar noon | 11:48 |
| Evening golden hour | 17:27 – 17:55 |
| Sunset | 17:55 |
| Civil twilight ends | 18:16 |
In Riacho Frio civil twilight lasts 21 minutes at each end of the day today, so it is light enough to walk outdoors from 05:21 to 18:16. 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 | 05:42 | 17:55 | 12h 12min | +34s |
| Sun, Oct 4 | 05:42 | 17:55 | 12h 13min | +33s |
| Mon, Oct 5 | 05:41 | 17:55 | 12h 13min | +34s |
| Tue, Oct 6 | 05:40 | 17:55 | 12h 14min | +34s |
| Wed, Oct 7 | 05:40 | 17:55 | 12h 14min | +33s |
| Thu, Oct 8 | 05:39 | 17:55 | 12h 15min | +33s |
| Fri, Oct 9 | 05:39 | 17:55 | 12h 15min | +35s |
Day length through the year in Riacho Frio
View data table
| Month | Day length |
|---|---|
| January | 12h 38min |
| February | 12h 25min |
| March | 12h 09min |
| April | 11h 52min |
| May | 11h 39min |
| June | 11h 32min |
| July | 11h 35min |
| August | 11h 46min |
| September | 12h 02min |
| October | 12h 19min |
| November | 12h 34min |
| December | 12h 42min |
How day length changes through the year in Riacho Frio
| Key date | Date | Sunrise | Sunset | Length |
|---|---|---|---|---|
| March equinox (start of autumn) | March 20 | 06:03 | 18:10 | 12h 6min |
| June solstice (start of winter) | June 21 | 06:15 | 17:47 | 11h 31min |
| September equinox (start of spring) | September 22 | 05:49 | 17:55 | 12h 6min |
| December solstice (start of summer) | December 21 | 05:36 | 18:19 | 12h 43min |
The longest days in Riacho Frio come around December, with 12h 43min of daylight, and the shortest around June, with 11h 31min. The seasonal swing is 1h 11min, a modest change typical of the tropics (10.12° S).
Time zone and comparison with the state capital
Riacho Frio uses the same time as Brasília (UTC-3). This is the same zone as most of the country and the one used for the official Brazilian time. Compared with Teresina, the state capital (608 km away), the Sun rises 7 min later on the clock and sets 10 min later. Today's daylight is 12h 12min here versus 12h 9min in Teresina.
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.
Riacho Frio at a glance
- StatePiauí (PI)
- Coordinates10.12° S, 44.95° W
- Time zoneUTC-3 (America/Sao_Paulo)
- Area code (DDD)89
- IBGE code2208858
- Difference from BrasíliaSame time as Brasília
Cities near Riacho Frio
| City | Distance | Sunrise | Sunset |
|---|---|---|---|
| Parnaguá | 37 km | 05:41 | 17:53 |
| São Gonçalo do Gurguéia | 41 km | 05:44 | 17:56 |
| Corrente | 42 km | 05:43 | 17:56 |
| Gilbués | 54 km | 05:44 | 17:56 |
| Monte Alegre do Piauí | 57 km | 05:44 | 17:56 |
| Barreiras do Piauí | 61 km | 05:44 | 17:57 |
See also
- Sunrise and sunset in Piauí and all its cities
- Sunrise and sunset in Teresina, the capital of Piauí
- Current time in Piauí
- 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.