Itaguaí Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Itaguaí.
Climate overview of Itaguaí
The climate in Itaguaí, Rio de Janeiro State, Brazil, is remarkably consistent, with temperatures year-round averaging 28°C (82°F). The warmest month is February at 31°C (88°F), and the coolest is July at 25°C (77°F).
The city receives considerable rainfall, with around 1632 mm (64 in) annually. January is the wettest month. It has a distinct rainy season from November to March. Sunshine peaks in January, when the city sees around 7.1 hours of sunshine per day.
Itaguaí Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Itaguaí - and find the best time to visit.
Monthly Temperature in Itaguaí
In Itaguaí temperatures are generally consistent throughout the year. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in February to a comfortable 25°C (77°F) in the coolest month, July.
Nights vary from 24°C (75°F) in February to around 17°C (63°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Itaguaí
Itaguaí experiences significant rainfall throughout the year, averaging 1632 mm (64 in) of precipitation annually. The climate in Itaguaí shows significant variation throughout the year. Expect heavy rainfall in January, the wettest month, with an average of 259 mm (10 in) of precipitation over 20 rainy days.
In contrast, the driest month August offers drier and sunnier days, with around 45 mm (1.8 in) of rainfall over 9 rainy days. For more details, please visit our Itaguaí Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Itaguaí
Itaguaí offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between January (7.1 hours daily) and September (4.8 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Itaguaí by Month
The relative humidity is high throughout the year in Itaguaí.
The city experiences its highest humidity in March, reaching 80%. In July, the humidity drops to its lowest level at 77%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Itaguaí
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August and September
- Warmest weather: January, February and March
- Most sunshine: January, February and March
- Fewest rainy days: June, July and August
- Wettest months: January, February, March, November and December, when rainfall is highest.
- Seasonal pattern: A distinct rainy season from November to March
Frequently asked questions about the climate in Itaguaí
What is the best time to visit Itaguaí?
May, June, July, August and September typically offer the most optimal weather in Itaguaí. In contrast, January, February and March tend to have less optimal conditions. Itaguaí has a distinct rainy season from November to March.
What temperatures can I expect in Itaguaí?
Daytime highs range from 25°C (77°F) in July to 31°C (88°F) in February. Nighttime lows range from 17°C (63°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does Itaguaí get?
Annual rainfall is around 1632 mm (64 in). January is the wettest month with 259 mm (10 in), while August is the driest with 45 mm (1.8 in).
How sunny is Itaguaí?
Itaguaí receives around 2,183 hours of sunshine per year. January is the sunniest month with 212 hours, while September is the cloudiest with just 144 hours. Overall, Itaguaí enjoys abundant sunshine.
Itaguaí 3-Day Forecast
Itaguaí on the map
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