São Francisco do Sul in Fall
In fall (March, April and May), São Francisco do Sul sees average daytime highs around 26°C and overnight lows near 19°C, with 424 mm of rain over about 49 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 23°C by late May. The sky is clear or mostly clear about 21% of the time across fall, and the air most often feels muggy.
Fall is São Francisco do Sul's 2nd-best season to visit on our travel score. For the whole year in context, see São Francisco do Sul's year-round climate.
- Avg daytime high
- 26°C
- 2nd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 424 mm
- 49 wet days
- Avg wind
- 6 km/h
- Travel score
- 5.5
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in São Francisco do Sul in Fall
Over the season highs ease from about 29°C in early March to 23°C by late May.
A typical fall day in São Francisco do Sul reaches about 26°C and drops to 19°C overnight. The warmest of the three months is March, the coolest May.
How fall really feels in São Francisco do Sul
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.
São Francisco do Sul 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° | 279 | 24.4 | 13.5 | 3.6 |
| Feb | 29° / 22° | 255 | 21.6 | 12.9 | 3.6 |
| Mar | 28° / 21° | 202 | 22.4 | 12.2 | 4.3 |
| Apr | 26° / 19° | 116 | 14.1 | 11.4 | 5.8 |
| May | 24° / 16° | 107 | 12.2 | 10.7 | 6.5 |
| Jun | 22° / 14° | 104 | 10 | 10.4 | 6.6 |
| Jul | 21° / 13° | 89 | 9.9 | 10.5 | 6.5 |
| Aug | 22° / 14° | 87 | 9.3 | 11.1 | 6.7 |
| Sep | 23° / 16° | 145 | 14.6 | 11.8 | 5.8 |
| Oct | 24° / 18° | 149 | 17.3 | 12.6 | 5.4 |
| Nov | 26° / 19° | 161 | 17.7 | 13.3 | 5.1 |
| Dec | 28° / 21° | 193 | 20.7 | 13.6 | 4.3 |
Cloud cover in Fall
The sky is clear or mostly clear about 21% of the time across fall.
Chance of precipitation in Fall
São Francisco do Sul gets around 424 mm of rain over 49 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 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 36 min in early March to 10 h 30 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 3.6 kWh/m².
Is fall a good time to visit São Francisco do Sul?
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 São Francisco do Sul for sightseeing.
What to pack for São Francisco do Sul in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, São Francisco do Sul sees daytime highs around 26°C and nights near 19°C. Pack light clothes and rain gear. About 49 days see rain.
Sea temperature near São Francisco do Sul in Fall
The nearest coast averages about 24°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 15 km away) is warmest in February at about 27°C and coldest in August near 18°C.
It's comfortable for a long swim from Sep 26 to Jun 19 — about 8.8 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 26 | 25 | 22 | 20 | 19 | 18 | 20 | 21 | 23 | 25 |
| Comfort | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Cool | Cool | Cool | Refreshing | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 26 | Warm |
| Apr | 25 | Warm |
| May | 22 | Refreshing |
| Jun | 20 | Refreshing |
| Jul | 19 | Cool |
| Aug | 18 | Cool |
| Sep | 20 | Cool |
| Oct | 21 | Refreshing |
| Nov | 23 | Refreshing |
| Dec | 25 | Warm |
UV index in São Francisco do Sul in Fall
Clear-sky midday UV across fall averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in São Francisco do Sul peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (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) | 14 | 13 | 11 | 8 | 6 | 5 | 5 | 6 | 9 | 10 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | Moderate | High | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 11 | Extreme |
| Apr | 8 | Very high |
| May | 6 | High |
| Jun | 5 | High |
| Jul | 5 | Moderate |
| Aug | 6 | High |
| Sep | 9 | Very high |
| Oct | 10 | Very high |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Air quality in São Francisco do Sul 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 São Francisco do Sul is worst in August — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (February, 9 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) | 9 | 9 | 9 | 10 | 12 | 14 | 15 | 15 | 14 | 12 | 9 | 9 |
| Level | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 9 | Good |
| Mar | 9 | Good |
| Apr | 10 | Good |
| May | 12 | Good |
| Jun | 14 | Moderate |
| Jul | 15 | Moderate |
| Aug | 15 | Moderate |
| Sep | 14 | Moderate |
| Oct | 12 | Good |
| Nov | 9 | Good |
| Dec | 9 | Good |
Where is São Francisco do Sul?
São Francisco do Sul sits at 26.2°S, 48.6°W, 16 m above sea level, in Brazil. The nearest listed city is Itapoá, 14 km away.
Topography around São Francisco do Sul
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Francisco do Sul.
Within 3 km, the terrain around São Francisco do Sul has only modest variations in elevation — a maximum elevation change of 146 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 580 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,647 m.
The land around São Francisco do Sul is covered by water (53%) and trees (26%) within 3 km, trees (51%) and water (36%) within 16 km, and trees (55%) and water (33%) 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 São Francisco do Sul (-26.2433°, -48.6381°, elevation 16 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.