Rio Grande in Fall
In fall (March, April and May), Rio Grande sees average daytime highs around 21°C and overnight lows near 19°C, with 308 mm of rain over about 30 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 24°C in early March to 17°C by late May. The sky is clear or mostly clear about 40% of the time across fall, and the air most often feels humid.
Fall is Rio Grande's 2nd-best season to visit on our travel score. For the whole year in context, see Rio Grande's year-round climate.
- Avg daytime high
- 21°C
- 2nd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 308 mm
- 30 wet days
- Avg wind
- 22 km/h
- Travel score
- 6.6
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Rio Grande in Fall
Over the season highs ease from about 24°C in early March to 17°C by late May.
A typical fall day in Rio Grande reaches about 21°C and drops to 19°C overnight. The warmest of the three months is March, the coolest May.
Rio Grande 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 | 24° / 22° | 87 | 8.6 | 13.9 | 7.4 |
| Feb | 24° / 23° | 84 | 9.7 | 13.2 | 7.0 |
| Mar | 24° / 22° | 92 | 10 | 12.2 | 7.1 |
| Apr | 21° / 19° | 113 | 10.2 | 11.2 | 6.6 |
| May | 19° / 16° | 104 | 9.7 | 10.4 | 6.1 |
| Jun | 16° / 14° | 110 | 9.7 | 9.9 | 5.0 |
| Jul | 15° / 12° | 112 | 10.2 | 10.1 | 4.4 |
| Aug | 15° / 13° | 108 | 9.7 | 10.8 | 4.8 |
| Sep | 16° / 14° | 125 | 10.4 | 11.8 | 5.1 |
| Oct | 18° / 17° | 129 | 10.2 | 12.8 | 6.0 |
| Nov | 21° / 19° | 87 | 7.7 | 13.6 | 6.8 |
| Dec | 23° / 21° | 86 | 7.8 | 14.1 | 7.3 |
Cloud cover in Fall
The sky is clear or mostly clear about 40% of the time across fall.
Chance of precipitation in Fall
Rio Grande gets around 308 mm of rain over 30 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 22 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 42 min in early March to 10 h 06 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 3.9 kWh/m².
Is fall a good time to visit Rio Grande?
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 Rio Grande for sightseeing.
What to pack for Rio Grande in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Rio Grande sees daytime highs around 21°C and nights near 19°C. Worth packing: light clothes, rain gear, sun protection and a windbreaker. About 30 days see rain.
Sea temperature near Rio Grande in Fall
The nearest coast averages about 22°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in February at about 24°C and coldest in July near 14°C.
It's comfortable for a long swim from Nov 18 to May 4 — about 5.5 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 24 | 24 | 24 | 22 | 19 | 16 | 14 | 14 | 15 | 18 | 20 | 22 |
| Comfort | Refreshing | Warm | Refreshing | Refreshing | Cool | Cool | Bracing | Bracing | Cool | Cool | Cool | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 24 | Refreshing |
| Feb | 24 | Warm |
| Mar | 24 | Refreshing |
| Apr | 22 | Refreshing |
| May | 19 | Cool |
| Jun | 16 | Cool |
| Jul | 14 | Bracing |
| Aug | 14 | Bracing |
| Sep | 15 | Cool |
| Oct | 18 | Cool |
| Nov | 20 | Cool |
| Dec | 22 | Refreshing |
UV index in Rio Grande in Fall
Clear-sky midday UV across fall averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rio Grande peaks around January 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).
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) | 12 | 12 | 9 | 7 | 4 | 3 | 3 | 5 | 7 | 7 | 11 | 12 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 9 | Very high |
| Apr | 7 | High |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 5 | Moderate |
| Sep | 7 | High |
| Oct | 7 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Where is Rio Grande?
Rio Grande sits at 32.0°S, 52.1°W, 7 m above sea level, in Brazil. The nearest listed city is São José do Norte, 6.0 km away.
Topography around Rio Grande
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rio Grande.
Within 3 km, the terrain around Rio Grande has only modest variations in elevation — a maximum elevation change of 11 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 33 m; within 80 km, significant variations in elevation — a maximum elevation change of 357 m.
The land around Rio Grande is covered by water (61%) and artificial surfaces (29%) within 3 km, water (52%) and grassland (20%) within 16 km, and water (48%) 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 Rio Grande (-32.035°, -52.0986°, elevation 7 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.