Rio Formoso in Fall

In fall (March, April and May), Rio Formoso sees average daytime highs around 30°C and overnight lows near 23°C, with 296 mm of rain over about 65 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.

Over the season highs ease from about 31°C in early March to 28°C by late May. The sky is clear or mostly clear about 26% of the time across fall, and the air most often feels oppressive.

Fall is Rio Formoso's weakest season of the year to visit on our travel score. Rio Formoso has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Rio Formoso's year-round climate.

Avg daytime high: 30°C; 2nd-warmest season
Avg overnight low: 23°C
Rainfall: 296 mm; 65 wet days
Avg wind: 8 km/h
Travel score: 3.8; weakest season of the year
Months: Mar · Apr · May

← Summer Rio Formoso year-round climate Winter →

Spring Summer Fall Winter

Temperature in Rio Formoso in Fall

Average highAverage lowShaded bands: 10–90% of days

Over the season highs ease from about 31°C in early March to 28°C by late May.

A typical fall day in Rio Formoso reaches about 30°C and drops to 23°C overnight. The warmest of the three months is March, the coolest May.

How fall really feels in Rio Formoso

Once humidity and wind are folded in, fall brings about 71 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Rio Formoso weather by month

How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 24°	56	17.3	12.4	4.1
Feb	31° / 24°	61	16.9	12.3	3.8
Mar	31° / 24°	80	19.5	12.1	3.8
Apr	30° / 24°	94	21	11.8	3.8
May	29° / 23°	123	24.1	11.6	3.9
Jun	27° / 22°	141	24.7	11.5	4.3
Jul	27° / 21°	123	24.8	11.5	4.5
Aug	27° / 21°	78	22.2	11.7	4.8
Sep	28° / 21°	54	17.5	11.9	5.3
Oct	29° / 22°	38	14.7	12.2	5.1
Nov	30° / 23°	30	11.5	12.4	5.0
Dec	30° / 23°	32	12.5	12.5	4.6

Cloud cover in Fall

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time across fall.

Chance of precipitation in Fall

Any precipitation

Rio Formoso gets around 296 mm of rain over 65 wet days across fall. The line is the day-by-day chance of measurable precipitation.

Humidity in Fall

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Fall

Winds average 8 km/h across fall.

Sunrise & sunset in Fall

DaylightNight

Daylight runs from about 12 h 12 min in early March to 11 h 30 min by late May. The lit band spans sunrise to sunset each day.

Solar energy in Fall

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across fall, about 4.9 kWh/m².

Planning a trip in fall

Hazard calendar for Rio Formoso

In seasonPeak

In fall, Rio Formoso overlaps 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 fall a good time to visit Rio Formoso?

Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

3.8

Sightseeing

4th-best month of the year

5.1

Beach & pool

3rd-best month of the year

fall is a weaker month for outdoor sightseeing in Rio Formoso.

What to pack for Rio Formoso in Fall

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

In fall, Rio Formoso sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 65 days see rain.

light clothesrain gearsun protection

Sea temperature near Rio Formoso in Fall

The nearest coast averages about 28°C across fall — 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	28	28	29	29	28	27	26	26	26	27	27	27
Comfort	Warm	Tropical	Tropical	Tropical	Tropical	Warm	Warm	Warm	Warm	Warm	Warm	Warm

	Sea temperature (°C)	Comfort
Jan	28	Warm
Feb	28	Tropical
Mar	29	Tropical
Apr	29	Tropical
May	28	Tropical
Jun	27	Warm
Jul	26	Warm
Aug	26	Warm
Sep	26	Warm
Oct	27	Warm
Nov	27	Warm
Dec	27	Warm

UV index in Rio Formoso in Fall

LowModerateHighVery highExtreme

Clear-sky midday UV across fall averages around 13 (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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	14	15	13	11	10	10	10	12	12	12	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	14	Extreme
Mar	15	Extreme
Apr	13	Extreme
May	11	Extreme
Jun	10	Very high
Jul	10	Very high
Aug	10	Very high
Sep	12	Extreme
Oct	12	Extreme
Nov	12	Extreme
Dec	12	Extreme

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

trees 55%

16 km

179 m

trees 36%

80 km

859 m

grassland 43%

treesgrasslandcroplandartificial surfaceswatermangroves

← Summer Rio Formoso year-round climate Winter →

Fall 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

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.