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Riachuelo Weather in December
In Riachuelo, December brings high daytime temperatures around 27°C (81°F), with nights cooling to 18°C (64°F). Expect quite a bit of rainfall this month.
Rainfall in Riachuelo in December
You can typically expect 10 days of rain this month, averaging around 88 mm (3.5 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Riachuelo in December
December in Riachuelo is generally excellent, with days reaching 27°C (81°F) and nights settling around 18°C (64°F). The summer season takes place during December. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.If you're inclined towards comfortable temperatures and drier conditions, December is a good time to visit Riachuelo.
Riachuelo Temperature in December
Min Temperature
18°C (64°F)
Max Temperature
27°C (81°F)
Chance of Rain
32%
Precipitation
88 mm (3.5 in)
Rainy days
10 days
Riachuelo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Riachuelo - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Riachuelo typically stay consistent throughout December, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows typically ranging from 17°C (63°F) to 20°C (68°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather records for Riachuelo in December
Browse day-by-day weather records for Riachuelo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Riachuelo historical weather extremes in December
According to our 49 years of weather records for Riachuelo, the following extremes were recorded between 1976 and 2025.
- On December 26, 2013, temperatures climbed to 38°C (100°F), marking the warmest December day on record.
- The coldest December day was on December 23, 1984, with a maximum of 17°C (63°F).
- Riachuelo registered its coldest December night on December 18, 1984, with temperatures dropping to 8°C (46°F).
Best Places in Uruguay in December
Find out more about the weather in Uruguay and which places have the best travel conditions in this month. See all of Uruguay in December →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Riachuelo in December
Warm temperatures in December make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes.
What To Do in Riachuelo in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping8/10 -
Outdoor sports7/10
Riachuelo 3-Day Forecast
More climate data for Riachuelo
See the full Riachuelo climate overview or explore weather in Uruguay.
Popular in December
Where to go in December - average daytime high across popular destinations.
Colonia del Sacramento
27°C (81°F) Montevideo26°C (79°F) La Pedrera
24°C (75°F) José Ignacio24°C (75°F) Piriápolis25°C (77°F) La Paloma23°C (73°F) Punta Del Diablo24°C (75°F) Punta del Este23°C (73°F) Bucket list
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