Colonia del Sacramento weather in January
January in Colonia del Sacramento: hot, rainy, with clean air — an excellent time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#8 of 12 months in Colonia del Sacramento · #467 of 1413 destinations to visit in January · comfort 80/100 (tier A)
- Days
- 29°C
- Nights
- 20°C
- Wet days
- 7
- Sun
- 12 h
- Humidity
- 65%
- Daylight
- 14 h
Traveller notes on Colonia del Sacramento in January
Notes from nearby Buenos Aires (52 km away)
Colonia del Sacramento doesn't have its own notes for January yet — these are about Buenos Aires, close enough to share the season.
Buenos Aires forum threads describe January as genuinely hot and humid, with posters citing typical highs in the low-to-mid 30s Celsius and occasional spikes into the low 40s on the hottest days, though that extreme wasn't described as common. Evenings were flagged repeatedly as staying hot, humid and still rather than cooling off, with several posters specifically recommending accommodation with air conditioning and ideally a pool for comfort. Rain does happen but was described as typically brief. Despite January being peak local vacation season, posters were split on crowd levels - some found the city noticeably quieter than usual as residents head to the coast, while others still found it busy, with a few suggesting a side trip to Mendoza or Patagonia for milder summer weather.
Other months in Colonia del Sacramento
Colonia's own forum doesn't have much May-specific weather chatter, but one useful data point came up in a beach thread: swimming season here doesn't really start until around Christmas, which confirms May sits well into the cooler off-season. The destination's own climate record fills in the rest - mild autumn days in the high teens C, cool nights, and only occasional rain. It's actually a pleasant month for what Colonia is really known for: wandering the cobblestone, Portuguese-influenced old town without summer crowds or heat.
Forum posters are candid that November weather in Uruguay isn't a guaranteed warm, sunny stretch - it's generally decent for touring but shouldn't be assumed reliably nice. For the town itself, posters consistently praise the UNESCO-listed historic quarter (founded 1680) for its Portuguese-influenced architecture and winding streets, often compared to old Lisbon, calling it clean, safe, and notably friendly and slow-paced. The fast ferry from Buenos Aires (as short as 15 minutes on some routes) makes it an easy day trip or overnight, and posters recommend an early start and staying at one of the town's posadas to properly soak in the pace rather than rushing through on a single-day visit.
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Colonia del Sacramento climate normals — January
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Colonia del Sacramento in January
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsUruguayan Carnaval, Summer season, school holidays in 4 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Colonia del Sacramento's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherColonia del Sacramento's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Colonia del Sacramento in January
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Festival
Uruguayan Carnaval
25 Jan – 10 Mar · usuallyCarnivalCrowdedUruguay runs the longest carnival in the world — weeks of neighbourhood tablados and murga stages — and Colonia fills for the two national holidays that close it. Source ↗
- Season
Summer season
15 Dec – 28 FebSchool holidaysCrowdedBook earlyBuenos Aires is an hour away by fast ferry and January empties into the old town. The cobbled streets and the riverfront restaurants are full, and rooms in the historic quarter go well ahead.
Nearby, and something's on
Within 300 km of Colonia del Sacramento — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Colonia del Sacramento?
Colonia del Sacramento in January — FAQ
- Is January a good time to visit Colonia del Sacramento?
- January in Colonia del Sacramento: hot, rainy, with clean air — an excellent time to visit. It ranks #8 of 12 months for Colonia del Sacramento on SeasonMap's comfort score (80/100).
- What is the weather like in Colonia del Sacramento in January?
- In January, Colonia del Sacramento averages a daily high of 28.5°C and a low of 20.2°C, with about 80.3 mm of rain over roughly 7.2 rainy days.
- What is the air quality in Colonia del Sacramento in January?
- Colonia del Sacramento has a mean US Air Quality Index of about 28 in January.
Within 300 km: Montevideo's Uruguayan carnival on 22 Jan – 8 Mar, and Buenos Aires' January summer shutdown around 24 Dec – 1 Feb.