Santos in Summer
In summer (December, January and February), Santos sees average daytime highs around 26°C and overnight lows near 24°C, with 604 mm of rain over about 56 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Over the season highs climb from about 24°C in early December to 27°C by late February. The sky is clear or mostly clear about 21% of the time across summer, and the air most often feels oppressive.
Summer is Santos's weakest season of the year to visit on our travel score. Santos 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 Santos's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 604 mm
- 56 wet days
- Avg wind
- 11 km/h
- Travel score
- 5.1
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Santos in Summer
Over the season highs climb from about 24°C in early December to 27°C by late February.
A typical summer day in Santos reaches about 26°C and drops to 24°C overnight. The warmest of the three months is February, the coolest December.
Santos weather by month
How the three summer months (December, January and February) 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 | 26° / 24° | 226 | 20.9 | 13.3 | 4.9 |
| Feb | 27° / 24° | 199 | 17.4 | 12.8 | 5.1 |
| Mar | 26° / 24° | 207 | 19.5 | 12.2 | 5.3 |
| Apr | 25° / 22° | 127 | 13.4 | 11.5 | 6.4 |
| May | 23° / 20° | 125 | 12.7 | 10.9 | 6.5 |
| Jun | 22° / 19° | 97 | 10 | 10.5 | 6.8 |
| Jul | 21° / 18° | 115 | 10 | 10.7 | 6.8 |
| Aug | 21° / 18° | 94 | 10.2 | 11.2 | 6.6 |
| Sep | 22° / 19° | 142 | 14.3 | 11.9 | 5.9 |
| Oct | 23° / 20° | 159 | 16.2 | 12.6 | 5.6 |
| Nov | 24° / 21° | 174 | 16.8 | 13.2 | 5.7 |
| Dec | 25° / 23° | 179 | 18.2 | 13.5 | 5.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 21% of the time across summer.
Chance of precipitation in Summer
Santos gets around 604 mm of rain over 56 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 11 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 24 min in early December to 12 h 30 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.9 kWh/m².
Is summer a good time to visit Santos?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Santos for sightseeing.
What to pack for Santos in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Santos sees daytime highs around 26°C and nights near 24°C. Pack rain gear and sun protection. Worth having: light clothes. About 56 days see rain.
Sea temperature near Santos in Summer
The nearest coast averages about 26°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 19 km away) is warmest in February at about 27°C and coldest in August near 20°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) | 27 | 27 | 27 | 26 | 24 | 22 | 21 | 20 | 21 | 22 | 23 | 25 |
| Comfort | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 26 | Warm |
| May | 24 | Refreshing |
| Jun | 22 | Refreshing |
| Jul | 21 | Refreshing |
| Aug | 20 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 22 | Refreshing |
| Nov | 23 | Refreshing |
| Dec | 25 | Warm |
UV index in Santos in Summer
Clear-sky midday UV across summer 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 Santos peaks around February 10 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) | 13 | 14 | 10 | 8 | 6 | 5 | 5 | 7 | 7 | 10 | 12 | 13 |
| Level | Extreme | Extreme | Very high | Very high | High | High | Moderate | High | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 14 | Extreme |
| Mar | 10 | Very high |
| Apr | 8 | Very high |
| May | 6 | High |
| Jun | 5 | High |
| Jul | 5 | Moderate |
| Aug | 7 | High |
| Sep | 7 | Very high |
| Oct | 10 | Extreme |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Air quality in Santos in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Santos is worst in July — around 23 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (February, 11 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Santos's WHO annual average of 15 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 11 | 11 | 12 | 16 | 22 | 23 | 21 | 18 | 13 | 11 | 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 | 11 | Good |
| Apr | 12 | Moderate |
| May | 16 | Moderate |
| Jun | 22 | Moderate |
| Jul | 23 | Moderate |
| Aug | 21 | Moderate |
| Sep | 18 | Moderate |
| Oct | 13 | Moderate |
| Nov | 11 | Good |
| Dec | 11 | Good |
Where is Santos?
Santos sits at 24.0°S, 46.3°W, 12 m above sea level, in Brazil. The nearest listed city is São Vicente, 6.0 km away.
Topography around Santos
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santos.
Within 3 km, the terrain around Santos has only modest variations in elevation — a maximum elevation change of 207 m around an average of 24 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 998 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,434 m.
The land around Santos is covered by artificial surfaces (54%) and water (27%) within 3 km, water (39%) and trees (33%) within 16 km, and water (47%) and trees (38%) 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 Santos (-23.9608°, -46.3336°, elevation 12 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.