Três Rios in Fall

In fall (March, April and May), Três Rios sees average daytime highs around 27°C and overnight lows near 18°C, with 240 mm of rain over about 34 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.

Over the season highs ease from about 29°C in early March to 24°C by late May. The sky is clear or mostly clear about 24% of the time across fall, and the air most often feels muggy.

Fall is Três Rios's 2nd-best season to visit on our travel score. For the whole year in context, see Três Rios's year-round climate.

Avg daytime high: 27°C; 2nd-warmest season
Avg overnight low: 18°C
Rainfall: 240 mm; 34 wet days
Avg wind: 6 km/h
Travel score: 6.1; 2nd-best season
Months: Mar · Apr · May

← Summer Três Rios year-round climate Winter →

Spring Summer Fall Winter

Temperature in Três Rios in Fall

Average highAverage lowShaded bands: 10–90% of days

Over the season highs ease from about 29°C in early March to 24°C by late May.

A typical fall day in Três Rios reaches about 27°C and drops to 18°C overnight. The warmest of the three months is March, the coolest May.

Três Rios 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	29° / 20°	233	19.5	13.2	4.1
Feb	30° / 20°	154	15.1	12.8	4.3
Mar	29° / 20°	148	17.7	12.2	4.5
Apr	27° / 18°	57	9.6	11.5	6.4
May	25° / 16°	35	6.3	11	7.4
Jun	24° / 14°	17	3.4	10.7	8.2
Jul	24° / 14°	18	3.7	10.8	8.2
Aug	25° / 14°	21	4.2	11.2	7.9
Sep	26° / 16°	59	8.7	11.9	6.8
Oct	27° / 18°	107	13.7	12.5	5.8
Nov	27° / 19°	198	18.8	13.1	4.8
Dec	29° / 20°	236	21.3	13.3	4.2

Cloud cover in Fall

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time across fall.

Chance of precipitation in Fall

Any precipitation

Três Rios gets around 240 mm of rain over 34 wet days across fall. The line is the day-by-day chance of measurable precipitation.

Humidity in Fall

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Fall

Winds average 6 km/h across fall.

Sunrise & sunset in Fall

DaylightNight

Daylight runs from about 12 h 30 min in early March to 10 h 48 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 4.3 kWh/m².

Planning a trip in fall

Hazard calendar for Três Rios

In seasonPeak

In fall, Três Rios overlaps its monsoon season. The full year is below, with each hazard's peak months called out.

Três Rios's monsoon runs October–March, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is fall a good time to visit Três Rios?

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.

6.1

Sightseeing

2nd-best month of the year

6.3

Beach & pool

2nd-best month of the year

fall is a reasonable time to visit Três Rios for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Três Rios in Fall

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

In fall, Três Rios sees daytime highs around 27°C and nights near 18°C. Pack light clothes and rain gear. Worth having: sun protection. About 34 days see rain.

light clothesrain gearsun protection

UV index in Três Rios in Fall

LowModerateHighVery highExtreme

Clear-sky midday UV across fall averages 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 Três Rios peaks around February 9 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 6 (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)	15	15	13	10	7	6	6	8	8	12	14	14
Level	Extreme	Extreme	Extreme	Very high	High	High	High	Very high	Very high	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	15	Extreme
Mar	13	Extreme
Apr	10	Very high
May	7	High
Jun	6	High
Jul	6	High
Aug	8	Very high
Sep	8	Very high
Oct	12	Extreme
Nov	14	Extreme
Dec	14	Extreme

Air quality in Três Rios in Fall

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.

Air quality in Três Rios is worst in September — around 22 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (January, 11 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	11	11	12	13	15	15	14	16	22	14	12	11
Level	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good

	PM2.5 (µg/m³)	Level
Jan	11	Good
Feb	11	Good
Mar	12	Good
Apr	13	Moderate
May	15	Moderate
Jun	15	Moderate
Jul	14	Moderate
Aug	16	Moderate
Sep	22	Moderate
Oct	14	Moderate
Nov	12	Good
Dec	11	Good

Location & terrain

Where is Três Rios?

Três Rios sits at 22.1°S, 43.2°W, 276 m above sea level, in Brazil. The nearest listed city is Paraíba do Sul, 10 km away.

Topography around Três Rios

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

Within 3 km, the terrain around Três Rios has significant variations in elevation — a maximum elevation change of 408 m around an average of 338 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 655 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,252 m.

The land around Três Rios is covered by grassland (52%), trees (24%) and artificial surfaces (22%) within 3 km, grassland (59%) and trees (37%) within 16 km, and trees (49%) and grassland (45%) within 80 km.

3 km

408 m

grassland 52%

16 km

655 m

grassland 59%

80 km

2,252 m

trees 49%

treesgrasslandartificial surfaceswater

← Summer Três Rios year-round climate Winter →

Fall weather nearby: Paraíba do Sul 10 km · São José do Vale do Rio Preto 30 km · Sapucaia 33 km · Paty do Alferes 41 km · Teresópolis 41 km · Juiz de Fora 42 km · São Pedro 42 km · Petrópolis 43 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 Três Rios (-22.1167°, -43.2092°, elevation 276 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.