Santarém in Summer
In summer (December, January and February), Santarém sees average daytime highs around 29°C and overnight lows near 25°C, with 1029 mm of rain over about 76 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 31°C in early December to 29°C by late February. The sky is clear or mostly clear about 8% of the time across summer, and the air most often feels oppressive.
Summer is Santarém's 3rd-best season to visit on our travel score. Santarém 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 Santarém's year-round climate.
- Avg daytime high
- 29°C
- 3rd-warmest season
- Avg overnight low
- 25°C
- Rainfall
- 1029 mm
- 76 wet days
- Avg wind
- 10 km/h
- Travel score
- 3.2
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Santarém in Summer
Over the season highs ease from about 31°C in early December to 29°C by late February.
A typical summer day in Santarém reaches about 29°C and drops to 25°C overnight. The warmest of the three months is December, the coolest February.
How summer really feels in Santarém
Once humidity and wind are folded in, summer brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Santarém 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 | 29° / 25° | 409 | 28.2 | 12.1 | 3.1 |
| Feb | 29° / 25° | 387 | 25.8 | 12.1 | 3.1 |
| Mar | 29° / 25° | 488 | 29.3 | 12 | 3.0 |
| Apr | 29° / 25° | 450 | 29.2 | 11.9 | 2.9 |
| May | 29° / 25° | 365 | 29.6 | 11.9 | 3.0 |
| Jun | 29° / 24° | 187 | 24.8 | 11.9 | 3.6 |
| Jul | 30° / 25° | 114 | 19.2 | 11.9 | 4.3 |
| Aug | 31° / 25° | 74 | 13 | 11.9 | 4.5 |
| Sep | 32° / 26° | 68 | 10.5 | 12 | 4.2 |
| Oct | 32° / 26° | 107 | 11.9 | 12.1 | 3.9 |
| Nov | 31° / 26° | 149 | 16.6 | 12.1 | 3.6 |
| Dec | 30° / 25° | 233 | 21.7 | 12.1 | 3.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 8% of the time across summer.
Chance of precipitation in Summer
Santarém gets around 1029 mm of rain over 76 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 10 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 06 min in early December to 12 h 06 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 5.0 kWh/m².
Hazard calendar for Santarém
In summer, Santarém overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Santarém's rainy season runs December–May, when most of the year's rain falls.
Is summer a good time to visit Santarém?
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 weaker month for outdoor sightseeing in Santarém.
What to pack for Santarém in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Santarém sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 76 days see rain.
UV index in Santarém 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 Santarém peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 10 (very 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 | 15 | 15 | 14 | 11 | 10 | 10 | 10 | 11 | 12 | 10 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 11 | Extreme |
| Jun | 10 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Extreme |
| Sep | 11 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Extreme |
| Dec | 11 | Extreme |
Air quality in Santarém 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 Santarém is worst in November — around 31 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (June, 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) | 17 | 16 | 16 | 14 | 10 | 9 | 9 | 12 | 15 | 24 | 31 | 23 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 16 | Moderate |
| Mar | 16 | Moderate |
| Apr | 14 | Moderate |
| May | 10 | Good |
| Jun | 9 | Good |
| Jul | 9 | Good |
| Aug | 12 | Good |
| Sep | 15 | Moderate |
| Oct | 24 | Moderate |
| Nov | 31 | Moderate |
| Dec | 23 | Moderate |
Where is Santarém?
Santarém sits at 2.4°S, 54.7°W, 51 m above sea level, in Brazil. The nearest listed city is Mojuí dos Campos, 28 km away.
Topography around Santarém
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santarém.
Within 3 km, the terrain around Santarém has only modest variations in elevation — a maximum elevation change of 70 m around an average of 34 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 198 m; within 80 km, significant variations in elevation — a maximum elevation change of 281 m.
The land around Santarém is covered by artificial surfaces (65%) within 3 km, water (40%) and trees (34%) within 16 km, and trees (49%) and water (27%) 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 Santarém (-2.4431°, -54.7083°, elevation 51 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.