Rio Formoso weather in August

In August, Rio Formoso sees average daytime highs of 27°C and overnight lows near 21°C, with 78 mm of rain across 22.2 wet days and about 11.7 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 20% of the time in August, and the air most often feels muggy.

Daylight stretches from about 11 h 36 min at the start of August to 11 h 48 min by month's end. Set against the rest of the year, August is Rio Formoso's 4th-clearest and 5th-windiest month. For the whole year in context, see Rio Formoso's year-round climate.

Daytime high
27°
11th warmest
Overnight low
21°
1st coldest
Rainfall
78 mm
22.2 wet days
Daylight
11 h 42 min
5:33 AM – 5:16 PM
Cloud cover
55%
4th clearest
Wind
10 km/h
5th windiest
Solar energy
4.55 kWh/m²
Travel score
4.8
out of 10

Rio Formoso is settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical August day in Rio Formoso reaches about 27°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, August runs on par with July and about 1°C cooler than September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12721
22721
32721
42721
52721
62721
72721
82721
92721
102721
112721
122721
132721
142721
152721
162721
172721
182721
192721
202721
212721
222721
232721
242721
252721
262721
272721
282721
292721
302721
312721

How August really feels in Rio Formoso

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Rio Formoso weather by month

How August compares with the rest of the year at a glance. August is the 11th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°5617.312.44.1
Feb31° / 24°6116.912.33.8
Mar31° / 24°8019.512.13.8
Apr30° / 24°942111.83.8
May29° / 23°12324.111.63.9
Jun27° / 22°14124.711.54.3
Jul27° / 21°12324.811.54.5
Aug27° / 21°7822.211.74.8
Sep28° / 21°5417.511.95.3
Oct29° / 22°3814.712.25.1
Nov30° / 23°3011.512.45.0
Dec30° / 23°3212.512.54.6

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 44% of August, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36139
46139
56238
66238
76238
86337
96238
106337
116337
126238
136238
146238
156238
166238
176238
186238
196337
206337
216436
226436
236535
246634
256832
266832
276931
286931
296931
306931
317030

Chance of precipitation in August

Any precipitation

Rio Formoso gets around 78 mm of rain over 22.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 72% and peaks near 76% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
176
275
375
474
573
673
772
872
972
1072
1172
1273
1373
1473
1573
1673
1773
1873
1973
2073
2173
2272
2372
2471
2571
2670
2770
2869
2969
3068
3168

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the muggy band about 77% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
117425
217524
317623
417722
517821
617821
717920
817920
917920
1018019
1118019
1218019
1318019
1418019
1518019
1618019
1717920
1817920
1917821
2017722
2117722
2217623
2317623
2417524
2527424
2627325
2727325
2827226
2927127
3027127
3127028

Wind in August

Winds average 10 km/h in August.

Across August, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 h 36 min at the start of August to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over August. Sunrise moves from 5:38 AM to 5:26 AM, and sunset from 5:15 PM to 5:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:385:15
211.65:385:15
311.65:385:15
411.65:375:16
511.65:375:16
611.65:375:16
711.75:375:16
811.75:365:16
911.75:365:16
1011.75:365:16
1111.75:355:16
1211.75:355:16
1311.75:355:16
1411.75:345:16
1511.75:345:16
1611.75:335:16
1711.75:335:16
1811.75:335:16
1911.75:325:16
2011.75:325:16
2111.75:315:16
2211.85:315:16
2311.85:305:16
2411.85:305:16
2511.85:295:16
2611.85:295:16
2711.85:285:16
2811.85:285:16
2911.85:275:16
3011.85:275:16
3111.85:265:15

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.55 kWh/m².

For context, solar energy here swings from a low near 3.87 kWh/m² to a high of 5.85 kWh/m² in November across the year — August's 4.55 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in August

Hazard calendar for Rio Formoso

In seasonPeak

In August, Rio Formoso sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Rio Formoso's rainy season runs March–August, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Rio Formoso?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.8
Sightseeing
4th-best month of the year
4.9
Beach & pool
9th-best month of the year

August is a reasonable time to visit Rio Formoso for sightseeing.

What to pack for Rio Formoso in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Rio Formoso sees daytime highs around 27°C and nights near 21°C. Pack rain gear. Worth having: light clothes and sun protection. About 22 days see rain.

rain gearlight clothessun protection

Sea temperature near Rio Formoso in August

The nearest coast averages about 26°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 km away) is warmest in April at about 29°C and coldest in August near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov27Warm
Dec27Warm

UV index in Rio Formoso in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rio Formoso peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 14UV 15Jun 23UV 10
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Rio Formoso?

Rio Formoso sits at 8.7°S, 35.2°W, 87 m above sea level, in Brazil. The nearest listed city is Sirinhaém, 10 km away.

Topography around Rio Formoso

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rio Formoso.

Within 3 km, the terrain around Rio Formoso has only modest variations in elevation — a maximum elevation change of 138 m around an average of 70 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 179 m; within 80 km, large variations in elevation — a maximum elevation change of 859 m.

The land around Rio Formoso is covered by trees (55%) and grassland (35%) within 3 km, trees (36%) and grassland (32%) within 16 km, and grassland (43%) and water (32%) within 80 km.

3 km
138 m
16 km
179 m
80 km
859 m
treesgrasslandcroplandartificial surfaceswatermangroves
August weather nearby: Sirinhaém 10 km · Tamandaré 12 km · Barreiros 17 km · São José da Coroa Grande 26 km · Gameleira 26 km · Ribeirão 29 km · Porto de Galinhas 32 km · Escada 35 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Rio Formoso (-8.6688°, -35.1628°, elevation 87 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).