Treinta y Tres Weather in December
December in Treinta y Tres sees daytime temperatures around 29°C (84°F) and lows of 16°C (61°F) at night. With around 103 mm (4.1 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Treinta y Tres in December
Climate statistics over the past 30 years suggest around 9 days of rain, with 103 mm (4.1 in) average for the month. 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 Treinta y Tres in December
If you're visiting Treinta y Tres in December, expect highs of 29°C (84°F) and overnight lows around 16°C (61°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 16°C (61°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.
Sunshine in Treinta y Tres in December
The city usually sees around 268 hours of sunlight, indicating many sunny days — a great month for sightseeing.If your ideal day consists of dry skies and pleasant temperatures, March and November typically offer the best circumstances for Treinta y Tres.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Uruguay, check out our Treinta y Tres's climate page.
Treinta y Tres Temperature in December
Min Temperature
16°C (61°F)
Max Temperature
29°C (84°F)
Chance of Rain
31%
Precipitation
103 mm (4.1 in)
Rainy days
9 days
Humidity
70%
Sunshine
268 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Treinta y Tres typically stay consistent throughout December, with daily highs averaging around 29°C (84°F). Nights are pleasant, with lows typically ranging from 15°C (59°F) to 18°C (64°F).
Average temperatures in December
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Treinta y Tres in December
Browse day-by-day weather records for Treinta y Tres spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Treinta y Tres historical weather extremes in December
Based on 45 years of weather observations in Treinta y Tres between 1980 and 2025, these are the recorded extremes.
- The warmest day in December was on December 26, 2013, with a maximum of 40°C (104°F).
- On December 18, 1980, Treinta y Tres saw its coldest December day with temperatures maxing out at 15°C (59°F).
- Nighttime temperatures dropped to 5°C (41°F) on December 9, 1995, marking the coldest December night on record.
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
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What to Wear in Treinta y Tres in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Treinta y Tres in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Uruguay, check out our Treinta y Tres's climate page.
Temperature Rainfall Sunshine Humidity
See the full Treinta y Tres climate overview or explore weather in Uruguay.
