Piraí in Fall
In fall (March, April and May), Piraí sees average daytime highs around 27°C and overnight lows near 19°C, with 412 mm of rain over about 48 wet days across the season. It is the 2nd-warmest season and the 2nd-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 27% of the time across fall, and the air most often feels muggy.
Fall is Piraí's 3rd-best season to visit on our travel score. For the whole year in context, see Piraí's year-round climate.
- Avg daytime high
- 27°C
- 2nd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 412 mm
- 48 wet days
- Avg wind
- 5 km/h
- Travel score
- 5.5
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Piraí in Fall
Over the season highs ease from about 29°C in early March to 24°C by late May.
A typical fall day in Piraí reaches about 27°C and drops to 19°C overnight. The warmest of the three months is March, the coolest May.
How fall really feels in Piraí
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
fall sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Piraí 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° / 22° | 309 | 23.5 | 13.2 | 3.6 |
| Feb | 30° / 22° | 222 | 19 | 12.8 | 3.8 |
| Mar | 29° / 21° | 225 | 22.6 | 12.2 | 4.1 |
| Apr | 27° / 19° | 117 | 14.5 | 11.5 | 5.8 |
| May | 25° / 17° | 70 | 11.3 | 10.9 | 6.7 |
| Jun | 24° / 16° | 40 | 6.7 | 10.6 | 7.6 |
| Jul | 24° / 15° | 42 | 7.4 | 10.8 | 7.7 |
| Aug | 25° / 16° | 37 | 7 | 11.2 | 7.5 |
| Sep | 26° / 17° | 81 | 11.8 | 11.9 | 6.4 |
| Oct | 27° / 19° | 120 | 15.6 | 12.5 | 5.5 |
| Nov | 27° / 20° | 200 | 20.4 | 13.1 | 4.7 |
| Dec | 28° / 21° | 252 | 23.2 | 13.4 | 4.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 27% of the time across fall.
Chance of precipitation in Fall
Piraí gets around 412 mm of rain over 48 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
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 5 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 30 min in early March to 10 h 42 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.3 kWh/m².
Hazard calendar for Piraí
In fall, Piraí overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Piraí's rainy season runs November–March, when most of the year's rain falls.
Is fall a good time to visit Piraí?
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.
fall is a reasonable time to visit Piraí for sightseeing.
What to pack for Piraí in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Piraí sees daytime highs around 27°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 48 days see rain.
Sea temperature near Piraí in Fall
The nearest coast averages about 25°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 55 km away) is warmest in February at about 26°C and coldest in August near 21°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) | 26 | 26 | 26 | 25 | 24 | 23 | 22 | 21 | 21 | 22 | 23 | 24 |
| Comfort | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 26 | Warm |
| Apr | 25 | Warm |
| May | 24 | Refreshing |
| Jun | 23 | Refreshing |
| Jul | 22 | Refreshing |
| Aug | 21 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 22 | Refreshing |
| Nov | 23 | Refreshing |
| Dec | 24 | Warm |
UV index in Piraí in Fall
Clear-sky midday UV across fall averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Piraí peaks around February 9 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (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 | 12 | 9 | 7 | 6 | 5 | 8 | 7 | 11 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | High | Very high | High | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 14 | Extreme |
| Mar | 12 | Extreme |
| Apr | 9 | Very high |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 5 | High |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 11 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Air quality in Piraí in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Piraí is worst in September — around 33 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 15 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) | 16 | 16 | 17 | 19 | 24 | 29 | 31 | 27 | 33 | 20 | 17 | 15 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 16 | Moderate |
| Mar | 17 | Moderate |
| Apr | 19 | Moderate |
| May | 24 | Moderate |
| Jun | 29 | Moderate |
| Jul | 31 | Moderate |
| Aug | 27 | Moderate |
| Sep | 33 | Moderate |
| Oct | 20 | Moderate |
| Nov | 17 | Moderate |
| Dec | 15 | Moderate |
Where is Piraí?
Piraí sits at 22.6°S, 43.9°W, 381 m above sea level, in Brazil. The nearest listed city is Pinheiral, 17 km away.
Topography around Piraí
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Piraí.
Within 3 km, the terrain around Piraí has only modest variations in elevation — a maximum elevation change of 209 m around an average of 430 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 806 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,556 m.
The land around Piraí is covered by trees (51%) and grassland (37%) within 3 km, trees (53%) and grassland (43%) within 16 km, and trees (43%), grassland (31%) and water (20%) within 80 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 Piraí (-22.6292°, -43.8981°, elevation 381 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.