Rio de Janeiro Sunrise & Sunset: August 2026

August Sunrise & Sunset in Rio de Janeiro: Complete Monthly Guide

In August 2026, Rio de Janeiro has an average of 11h 20m of daylight per day. Sunrise times range from 06:28 at the start of the month to 06:05 at the end, while sunset shifts from 17:32 to 17:43.

August in Rio de Janeiro brings short winter days in the southern hemisphere. Average sunrise in August is 06:18 and average sunset is 17:38. The daily table above shows the exact sunrise and sunset time for each day of the month.

Day Length Variation in August

Day length in Rio de Janeiro in August changes throughout the month. Near the solstices (June 21 for the northern hemisphere, December 21 for the southern hemisphere), day length changes very slowly, less than 1 minute per day. Near the equinoxes (March 20 and September 22), day length changes rapidly, gaining or losing 2 to 4 minutes per day depending on latitude.

At Rio de Janeiro's latitude of -22.9°, the rate of day length change in August is approximately 1 to 2 minutes per day during the weeks furthest from the solstices. This means that sunrise in Rio de Janeiro shifts by approximately 20 to 40 minutes over the course of August.

Golden Hour in Rio de Janeiro in August

Golden hour in Rio de Janeiro in August occurs twice each day: in the morning shortly after sunrise, and in the evening before sunset. The duration depends on the sun's angle of elevation above the horizon, which varies with latitude and month. In Augustat Rio de Janeiro's latitude of -22.9°, golden hour lasts approximately 25 to 45 minutes.

For photographers planning shoots in Rio de Janeiro in August: plan to arrive at your location 30 to 40 minutes before the listed sunrise time to capture blue hour before golden hour begins. The transition from blue hour to golden hour creates the most dramatic color sequences. Evening golden hour in August begins about 45 to 60 minutes before sunset and produces warmer, more orange tones than the morning session.

Blue Hour and Twilight in Rio de Janeiro in August

Civil twilight in Rio de Janeiro in August begins before sunrise and ends after sunset, creating windows of usable natural light even outside the official sunrise-to-sunset window. Civil twilight occurs when the sun is between 0 and 6 degrees below the horizon. Nautical twilight spans 6 to 12 degrees below the horizon. Astronomical twilight spans 12 to 18 degrees below the horizon.

The total twilight window in Rio de Janeiro in August extends the usable light day by approximately 45 to 70 minutes beyond the sunrise-to-sunset window. This extended twilight is valuable for photographers who want to shoot in soft, diffused light without harsh shadows.

Photography Tips for August in Rio de Janeiro

Shooting in Rio de Janeiro in August requires adapting to the season's specific light quality and timing. Camera settings for sunrise photography in August:

• Blue hour: ISO 800 to 1,600; aperture f/8; shutter speed 10 to 30 seconds on tripod.
• Golden hour: ISO 100 to 400; aperture f/8 to f/16 for landscapes, or f/1.8 to f/2.8 for portraits; shutter speed 1/250 to 1/1,000s handheld.
• Post-sunrise (30 minutes after): ISO 100; aperture f/11; shutter speed 1/500 to 1/2,000s.

In August, Rio de Janeiro's weather patterns affect photography conditions. Check cloud cover forecasts the evening before a planned shoot: a thin layer of clouds above the horizon creates more dramatic golden and orange tones than a clear sky. Fully overcast conditions produce flat, diffused light that is good for portraits but lacks the dramatic quality of golden hour. Partly cloudy skies create the most dramatic conditions.

About This Monthly Sunrise Data

All sunrise and sunset times in this August table for Rio de Janeiro are calculated using Jean Meeus astronomical algorithms, implemented via the SunCalc library. Calculations use the coordinates of Rio de Janeiro (-22.9068°, -43.1729°) and the local timezone (America/Sao_Paulo). Times are accurate to within 1 minute and account for atmospheric refraction.

The times shown are for the center of the sun crossing the horizon. Sunrise is defined as the moment when the upper limb of the sun first appears above the mathematical horizon. Sunset is when the upper limb disappears below the horizon. Both definitions account for atmospheric refraction, which lifts the apparent position of the sun by approximately 0.5 to 1 degree near the horizon.

Frequently Asked Questions: August Sunrise & Sunset in Rio de Janeiro

What is the average sunrise time in Rio de Janeiro in August?

The average sunrise time in Rio de Janeiro in August 2026 is approximately 06:18. This is based on the mid-month calculation for Rio de Janeiro at latitude -22.91° and longitude -43.17°. Actual daily sunrise times vary from 06:28 on the first of the month to 06:05 on the last day. See the full daily table above for exact times.

How many hours of daylight does Rio de Janeiro get in August?

Rio de Janeiro receives an average of 11h 20m of daylight per day in August 2026. This is calculated as the difference between sunrise and sunset and does not include twilight periods. Day length varies from 11h 04m on the first of the month to 11h 38m on the last day.

What is the earliest sunrise in Rio de Janeiro in August?

The earliest sunrise in Rio de Janeiro in August 2026 occurs on 2026-08-31 at 06:05. The latest sunrise in the month occurs on 2026-08-01 at 06:28.

What time is golden hour in Rio de Janeiro in August?

Golden hour in Rio de Janeiro in August occurs twice daily. Morning golden hour begins at sunrise (06:18 at mid-month) and lasts approximately 25 to 45 minutes. Evening golden hour begins approximately 45 to 60 minutes before sunset (17:38 at mid-month). The precise start of golden hour is when the sun's altitude drops below 6 degrees above the horizon.

Is August a good time to photograph sunrise in Rio de Janeiro?

August is winter in Rio de Janeiro's southern hemisphere location. Sunrise at 06:18 provides a late, accessible start time for photography.

When does civil twilight start in Rio de Janeiro in August?

Civil twilight in Rio de Janeiro in August begins approximately 20 to 30 minutes before sunrise and ends 20 to 30 minutes after sunset. At Rio de Janeiro's latitude of -22.9°, civil twilight in August starts around 05:53 in the morning. Civil twilight provides enough light for outdoor activities without artificial lighting and is considered the beginning of the usable photography window each day.