Guapimirim in Summer
In summer (December, January and February), Guapimirim sees average daytime highs around 29°C and overnight lows near 21°C, with 893 mm of rain over about 66 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 16% of the time across summer, and the air most often feels muggy.
Summer is Guapimirim's weakest season of the year to visit on our travel score. For the whole year in context, see Guapimirim's year-round climate.
- Avg daytime high
- 29°C
- warmest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 893 mm
- 66 wet days
- Avg wind
- 5 km/h
- Travel score
- 4.0
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Guapimirim in Summer
Across summer, daytime highs hold fairly steady around 29°C.
A typical summer day in Guapimirim reaches about 29°C and drops to 21°C overnight. The warmest of the three months is February, the coolest December.
Guapimirim 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° / 21° | 328 | 23.3 | 13.2 | 3.8 |
| Feb | 29° / 21° | 242 | 18.7 | 12.8 | 4.0 |
| Mar | 28° / 20° | 259 | 22.2 | 12.2 | 4.3 |
| Apr | 27° / 19° | 119 | 15.3 | 11.5 | 5.7 |
| May | 24° / 16° | 80 | 11.4 | 10.9 | 6.8 |
| Jun | 24° / 15° | 49 | 7.4 | 10.6 | 7.6 |
| Jul | 24° / 14° | 48 | 7.2 | 10.8 | 7.6 |
| Aug | 24° / 15° | 49 | 7.5 | 11.2 | 7.5 |
| Sep | 25° / 16° | 102 | 12 | 11.9 | 6.6 |
| Oct | 26° / 18° | 150 | 16 | 12.5 | 5.6 |
| Nov | 26° / 19° | 272 | 20.7 | 13.1 | 4.7 |
| Dec | 28° / 20° | 323 | 23.6 | 13.4 | 4.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 16% of the time across summer.
Chance of precipitation in Summer
Guapimirim gets around 893 mm of rain over 66 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 18 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 5.7 kWh/m².
Hazard calendar for Guapimirim
In summer, Guapimirim overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Guapimirim's rainy season runs October–March, when most of the year's rain falls.
Is summer a good time to visit Guapimirim?
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 Guapimirim for sightseeing.
What to pack for Guapimirim in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Guapimirim sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 66 days see rain.
Sea temperature near Guapimirim in Summer
The nearest coast averages about 25°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 66 km away) is warmest in March at about 25°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) | 25 | 25 | 25 | 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 | 25 | Warm |
| Feb | 25 | Warm |
| Mar | 25 | 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 Guapimirim in Summer
Clear-sky midday UV across summer averages around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Guapimirim peaks around January 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 6 (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) | 15 | 14 | 13 | 10 | 7 | 6 | 6 | 8 | 7 | 12 | 14 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | High | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Very high |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 8 | Very high |
| Sep | 7 | Very high |
| Oct | 12 | Extreme |
| Nov | 14 | Extreme |
| Dec | 14 | Extreme |
Air quality in Guapimirim 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 Guapimirim is worst in September — around 19 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (March, 10 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) | 11 | 11 | 10 | 12 | 15 | 16 | 15 | 15 | 19 | 13 | 11 | 10 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 11 | Good |
| Mar | 10 | Good |
| Apr | 12 | Good |
| May | 15 | Moderate |
| Jun | 16 | Moderate |
| Jul | 15 | Moderate |
| Aug | 15 | Moderate |
| Sep | 19 | Moderate |
| Oct | 13 | Moderate |
| Nov | 11 | Good |
| Dec | 10 | Good |
Where is Guapimirim?
Guapimirim sits at 22.5°S, 43.0°W, 33 m above sea level, in Brazil. The nearest listed city is São Pedro, 13 km away.
Topography around Guapimirim
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Guapimirim.
Within 3 km, the terrain around Guapimirim has significant variations in elevation — a maximum elevation change of 480 m around an average of 97 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,243 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,252 m.
The land around Guapimirim is covered by trees (74%) within 3 km, trees (71%) and grassland (22%) within 16 km, and trees (47%) and grassland (29%) 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 Guapimirim (-22.5372°, -42.9819°, elevation 33 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.