São João de Meriti Weather in December

In São João de Meriti, December brings very high daytime temperatures around 31°C (88°F), with nights cooling to 22°C (72°F). This month falls within the rainy season, so expect frequent rainfall.

Rainfall in São João de Meriti in December

As part of the rainy season, São João de Meriti sees around 21 days of rain in December, with an average of 205 mm (8.1 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.

Temperature in São João de Meriti in December

December in São João de Meriti sees highs of 31°C (88°F) and lows of 22°C (72°F) overnight. It's usually most comfortable outside during the morning and later in the day. At 22°C (72°F) overnight, nights are warm enough to sit outside comfortably in light clothing.

Sunshine in São João de Meriti in December

The city usually sees around 182 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).

Wind Speed in São João de Meriti in December

Wind speeds average 3 m/s (6 knots) during December. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in December

The water is 24°C (75°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit São João de Meriti. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit Brazil, check out our São João de Meriti's climate page.

São João de Meriti Temperature in December

Min Temperature 22°C (72°F)  

Max Temperature 31°C (88°F)  

Water Temperature 24°C (75°F) *  

Chance of Rain 70%  

Precipitation 205 mm (8.1 in)  

Rainy days 21 days  

Humidity 80% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 182 hours *  

Percentage Sunshine *  

* Data from: Rio de Janeiro, Brazil (24 KM, 15 Miles).

What to Wear in São João de Meriti in December

Warm but pleasant conditions in São João de Meriti in December. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. With water temperatures around 24°C (75°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in São João de Meriti in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Brazil, check out our São João de Meriti's climate page.

More climate data for São João de Meriti

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full São João de Meriti climate overview or explore weather in Brazil.