Treinta y Tres weather in January

In January, Treinta y Tres sees average daytime highs of 29°C and overnight lows near 18°C, with 83 mm of rain across 8.5 wet days and about 13.9 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 38% of the time in January, and the air most often feels muggy.

Daylight stretches from about 14 h 12 min at the start of January to 13 h 36 min by month's end. Set against the rest of the year, January is Treinta y Tres's 2nd-clearest and 7th-windiest month. For the whole year in context, see Treinta y Tres's year-round climate.

Daytime high
29°
1st warmest
Overnight low
18°
12th coldest
Rainfall
83 mm
8.5 wet days
Daylight
14 hours
6:48 AM – 8:46 PM
Cloud cover
52%
2nd clearest
Wind
13 km/h
7th windiest
Solar energy
6.79 kWh/m²
Travel score
5.8
out of 10

Treinta y Tres is city of Treinta y Tres Department, Uruguay.

Density
1,429/km²
people per km²
Founded
1853

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical January day in Treinta y Tres reaches about 29°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, January runs about 1°C warmer than December and about 1°C warmer than February.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12918
22918
32918
42918
52918
62918
72918
82918
92918
102918
112918
122918
132918
142918
152918
162918
172918
182918
192918
202918
212918
222918
232918
242918
252918
262918
272918
282918
292918
302918
312918

Treinta y Tres weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 18°838.513.95.8
Feb28° / 18°948.913.26.1
Mar27° / 16°828.712.36.8
Apr23° / 14°1088.711.27.0
May19° / 10°97710.36.6
Jun17° / 918.19.85.5
Jul16° / 898105.3
Aug18° / 1038.210.86.1
Sep19° / 998.611.86.3
Oct22° / 12°1121012.86.6
Nov25° / 14°928.113.77.2
Dec28° / 16°878.414.26.6

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 17% of January, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35545
45545
55644
65644
75545
85545
95545
105545
115545
125545
135545
145545
155545
165545
175545
185545
195545
205545
215545
225545
235446
245446
255347
265347
275347
285248
295248
305149
315149

Chance of precipitation in January

Any precipitation

Treinta y Tres gets around 83 mm of rain over 8.5 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
124
224
324
425
525
625
726
826
927
1027
1128
1228
1329
1429
1529
1629
1729
1828
1928
2028
2128
2228
2329
2429
2530
2630
2731
2832
2933
3033
3134

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the muggy band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 42% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11418273290
21318273290
31318273390
41318273390
51319263390
61319273390
713192732100
813192732100
913192732100
1012202731100
111220283190
121220283190
131220283190
141220283090
151220283090
161220293090
1712202930100
1812202930100
1911202930100
2011202930100
2111202830100
2211202831100
2310202831110
2410192732110
2510192732110
2610192632121
2710192633121
2810182633131
2910182533131
3010182533141
3110182533141

Wind in January

Winds average 13 km/h in January.

Across January, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 14 h 12 min at the start of January to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over January. Sunrise moves from 6:36 AM to 7:01 AM, and sunset from 8:46 PM to 8:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.26:368:46
214.26:368:46
314.16:378:46
414.16:388:46
514.16:398:46
614.16:398:46
714.16:408:46
814.16:418:47
914.16:428:47
1014.16:438:47
1114.16:438:47
1214.06:448:47
1314.06:458:46
1414.06:468:46
1514.06:478:46
1614.06:488:46
1714.06:498:46
1813.96:498:46
1913.96:508:45
2013.96:518:45
2113.96:528:45
2213.96:538:44
2313.86:548:44
2413.86:558:44
2513.86:568:43
2613.86:578:43
2713.76:588:42
2813.76:598:42
2913.77:008:41
3013.77:008:41
3113.67:018:40

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 6.79 kWh/m².

For context, solar energy here swings from a low near 2.21 kWh/m² to a high of 7 kWh/m² in December across the year — January's 6.79 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
17.0Intense
27.0Intense
37.0Intense
47.0Intense
57.0Intense
67.0Intense
77.0Intense
87.0Intense
97.0Intense
107.0Intense
116.9Intense
126.9Intense
136.9Intense
146.9Intense
156.9Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.7Intense
216.7Intense
226.7Intense
236.6Intense
246.6Intense
256.5Intense
266.5Intense
276.4Intense
286.4Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in January

Is January a good time to visit Treinta y Tres?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.8
Sightseeing
10th-best month of the year
7.3
Beach & pool
1st-best month of the year

January is a reasonable time to visit Treinta y Tres for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Treinta y Tres in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Treinta y Tres sees daytime highs around 29°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Treinta y Tres in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Treinta y Tres peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 13Jun 18UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Treinta y Tres?

Treinta y Tres sits at 33.2°S, 54.4°W, 55 m above sea level, in Uruguay. The nearest listed city is Melo, 98 km away.

MeloSanta Vitória do PalmarJaguarãoRochaMinasLa PalomaArroio GrandeSan Carlos

Topography around Treinta y Tres

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Treinta y Tres.

Within 3 km, the terrain around Treinta y Tres has only modest variations in elevation — a maximum elevation change of 44 m around an average of 40 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 144 m; within 80 km, significant variations in elevation — a maximum elevation change of 375 m.

The land around Treinta y Tres is covered by grassland (38%), trees (35%) and artificial surfaces (24%) within 3 km, grassland (72%) within 16 km, and grassland (69%) within 80 km.

3 km
44 m
16 km
144 m
80 km
375 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Melo 98 km · Santa Vitória do Palmar 100 km · Jaguarão 120 km · Rocha 139 km · Minas 150 km · La Paloma 161 km · Arroio Grande 164 km · San Carlos 180 km

Uruguay travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / I / L
230 V · 50 Hz
Prices
≈ 66% of US
price level, 2025
GDP per capita
$25,216
2025
Happiness
6.6 / 10
World Happiness, 2025
Homicide rate
11.2
per 100k, 2023
Road deaths
14.8
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 542
Religion
none 47%Roman Catholic 37%Protestant 15%atheist 10%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Treinta y Tres (-33.231°, -54.3858°, elevation 55 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).