Uruguay weather in January - temperature, rain and is it a good time to visit?

Weather in January at a glance

Daytime temperature: 30°C
Night-time temperature: 18°C
Daylight hours: 14h14min
Chance of rain: 20%
Days with thunderstorms: 15%
Muggy days: 87%

An overview for the country. Conditions can vary between cities and regions.

Plan your trip · January

Uruguay in January: weather for a week away

Compare destinations and see how many days of a typical trip met your preferred temperature range, with less than 1 mm of daily precipitation.

Historical dataNASA POWER1981-2025

City or region

Compare with history

What weather do you prefer?

Montevideo in January: Sightseeing

1981-2025

Daytime temperature 18-28°CDaily precipitation Less than 1 mm

Days matching your plans

3.6 / 7

Weekly average; typical number of days: 2-5

At least 5 matching days

32%

of historical weeks

All 7 days match

of historical weeks

How many matching days were there in a week?

Each bar shows the share of historical weeks.

0days

1day

16%

2days

20%

3days

22%

4days

21%

5days

6days

7days

5-7 days matching your preferences

When to go? Compare the months

Average matching days per week

3.6Jan 3.5Feb 4.4Mar 4Apr 1.5May 0.2Jun 0.2Jul 0.5Aug 0.9Sept 2.8Oct 4.1Nov 4.2Dec

The highest average was in March: 4.4 matching days per week.

Uruguay in January: which destinations match most often?

Comparison of 10 cities and regions using your selected conditions.

Montevideo · 1981-2025

Hot days and warm nights in January

Does the temperature drop below 20°C during hot weather?

91%of hot days with a minimum ≥20°C

65%of weeks with at least 3 warm nights*

On 91% of hot days, the temperature stayed at or above 20°C even at its coolest. This covers 108 days with a maximum of at least 30°C.

Lowest temperature on hot days

Below 18°C0%

18°C to below 20°C9%

At least 20°C91%

* A warm night is represented by the daily minimum ≥20°C. Maximum and minimum refer to the same day; this does not isolate the night following a particular hot day.

Montevideo · Your holiday week

How much can temperatures change during a week?

Check cooler hours as well as afternoon temperatures.

Coolest time of day16.8-19.3°CWeekly minimum: typical range

Warmest day27.9-30.6°CWeekly maximum: typical range

6.4°CTypical difference between the highest and lowest daytime maxima in a week

How often does it get cooler from one day to the next?

31%of weeks with a day-to-day drop in maximum temperature of at least 5°C

Bring a layer for cooler days. Marked drops in temperature occurred in a substantial share of historical weeks.

Ranges are the 20th-80th percentiles of whole-week minima and maxima, not forecast limits. Cooling compares consecutive daily maxima, not day and night temperatures.

Compare all destinations

18-28°C · Less than 1 mm · 1981-2025
City or region	Days matching your plans	At least 5 matching days	All 7 days match
Montevideo	3.6 / 7	32%	3%
Fray Bentos	0.4 / 7	0%	0%
Trinidad	0.7 / 7	<1%	0%
Salto	0.3 / 7	0%	0%
Paysandú	0.4 / 7	0%	0%
Rivera	0.5 / 7	<1%	0%
Maldonado	4.1 / 7	43%	5%
Tacuarembo	0.5 / 7	<1%	0%
Durazno	0.7 / 7	<1%	0%
Treinta y Tres	1.7 / 7	5%	<1%

Where do the figures come from?

The analysis includes 1,125 complete 7-day periods out of 1,125 possible periods in 45 years (1981-2025), for Montevideo. Every week lies entirely within the selected month. Overlapping weeks are not independent samples. Incomplete weeks are excluded.

A matching day has a daily maximum within the selected temperature range, inclusive, and precipitation below 1 mm. Trace precipitation is possible. The typical range is the 20th-80th percentile of matching days per week. Daily percentages count each calendar day once; categories can overlap.

NASA POWER provides daily MERRA-2 grid data for each location, not city weather-station measurements or an area-wide country average. These are historical frequencies, not a forecast or a measure of forecast accuracy. This comparison does not include cloud, wind, humidity, sea temperature or changes within the day, and does not assess outdoor safety. Check the current forecast before travelling. NASA POWER Daily API.

Historical frequency, not a forecast for your travel dates.

Uruguay - January vs the year - annual climate

In January, Uruguay averages about 30° during the day and 18° at night. It's usually fairly dry, with only about a 20% chance of rain.

Historical weather 1981-2025

Weather in Uruguay in January: trends from 1981 to 2025

NASA POWER

From 2016 to 2025, the average daytime high was 32°C, close to the level recorded in 1981-1990. 2023 was the warmest (36.1°C), while 1998 was the coolest (27.6°C).

Differences between years

How similar is the weather in January from year to year?

In 60% of the years compared, temperature and the number of wet days were close to typical for this month.

Similar means an average daily maximum within 2°C and a wet-day count within 3 days of the 1991-2020 medians. This is historical similarity, not forecast accuracy.

60%of years with similar conditions

Typical average daytime high29.6°C–32°C

Typical number of wet days7–11 days

Daytime temperatures in January: year by year

Monthly average daily maximum temperature: compare individual years and the longer-term trend.

45 years of data

Coolest month27.6°C 1998

Warmest month36.1°C 2023

Latest year in the data34°C 2025

Average for each year5-year average1991-2020 reference: 30.8°C

Blue band: the 20th-80th percentile of monthly averages in 1991-2020. The thicker line is the average of five consecutive years. Highlights describe whole months, not single-day records.

View temperatures for every year

Year	Average daytime maximum	5-year average
1981	28.6°C	-
1982	31.8°C	-
1983	33°C	-
1984	30.3°C	-
1985	31.8°C	31.1°C
1986	34°C	32.2°C
1987	31.9°C	32.2°C
1988	29°C	31.4°C
1989	34.7°C	32.3°C
1990	33.7°C	32.7°C
1991	29.9°C	31.8°C
1992	29.7°C	31.4°C
1993	29.3°C	31.5°C
1994	29.8°C	30.5°C
1995	32°C	30.1°C
1996	30.7°C	30.3°C
1997	34.2°C	31.2°C
1998	27.6°C	30.9°C
1999	29.4°C	30.8°C
2000	34.1°C	31.2°C
2001	29.9°C	31°C
2002	29.8°C	30.2°C
2003	30.1°C	30.7°C
2004	31.6°C	31.1°C
2005	33.7°C	31°C
2006	31.7°C	31.4°C
2007	31.7°C	31.8°C
2008	31°C	31.9°C
2009	31.9°C	32°C
2010	29.1°C	31.1°C
2011	32.1°C	31.2°C
2012	33.4°C	31.5°C
2013	30.1°C	31.3°C
2014	31.1°C	31.2°C
2015	28.3°C	31°C
2016	31.5°C	30.9°C
2017	30.4°C	30.3°C
2018	32°C	30.7°C
2019	28°C	30°C
2020	29.8°C	30.3°C
2021	32.4°C	30.5°C
2022	33.5°C	31.1°C
2023	36.1°C	32°C
2024	32.3°C	32.8°C
2025	34°C	33.7°C

How has January changed since the 1980s?

A comparison of 1981-1990 with 2016-2025 shows how temperatures, rainfall and the frequency of longer hot spells have changed.

The average daytime high remained close to its 1981-1990 level.

Daytime high

1981-199031.9°C2016-202532°C

change: +0.1°C

Hot days

1981-199021.5 days2016-202522.3 days

change: +0.8 days

Warm nights

1981-199010.8 days2016-20259.6 days

change: −1.2 days

Wet days

1981-199012.8 days2016-20259.1 days

change: −3.7 days

Years with a heatwave

1981-199090%2016-2025100%

change: +10 pp

How often does January bring heat, frost and rain?

Typical number of days and monthly precipitation based on the 1991-2020 climate normal.

Warm days30 dayshigh of at least 25°C

Hot days17 dayshigh of at least 30°C

Frost nights0 dayslow below 0°C

Warm nights9 dayslow of at least 20°C

Wet days10 daysat least 1 mm

Monthly rainfall70 mmtypical total

How often does it rain in Uruguay in January?

The chances use every consecutive 3-, 5- and 7-day period from 1981 to 2025. A wet day has at least 1 mm of precipitation.

A full seven days without rain occurred in 15% of historical periods. At least one wet day occurred in 85% of weeks.

3 rain-free days42%historical chance

5 rain-free days25%historical chance

7 rain-free days15%historical chance

Longest dry spell8 daystypical in the month

Longest wet spell4 daystypical in the month

Heatwaves, warm nights and cool spells in January

The percentages show years with at least one run of three consecutive days or nights meeting the stated threshold.

Heatwave96%3 days with highs of at least 30°C43 of 45 years · most often: Days 1-10

Run of warm nights84%3 nights with lows of at least 20°C38 of 45 years · most often: Day 21 to month end

Run of frosty nights0%3 nights with lows below 0°C0 of 45 years

Marked cool spell47%3 days with highs no greater than 28.1°C21 of 45 years · most often: Days 1-10

Highest and lowest values since 1981

Highest temperature41.8°C14 January 2022

Coolest night10.1°C1 January 2004

Wettest day61.4 mm5 January 2002

Start, middle or end of the month - when is the weather most stable?

We compare temperatures, dry days, heavy rain and wind. The highlighted period usually has the lowest combined risk of rain and stronger winds.

Days 1-10

31°CDaytime high18.2°CNight

Dry days: 7 days
Heavy-rain risk: 10%
Hot days: 59%
Stronger wind: 1%

Days 11-20most stable

30.4°CDaytime high17.7°CNight

Dry days: 7 days
Heavy-rain risk: 8%
Hot days: 53%
Stronger wind: 1%

Day 21 to month end

31°CDaytime high18.7°CNight

Dry days: 8 days
Heavy-rain risk: 9%
Hot days: 61%
Stronger wind: 2%

The most stable conditions for rain and wind usually occur during: Days 11-20.

Country values are the median of data for 10 cities covered by the site. Source: NASA POWER daily gridded data (MERRA-2), 1981-2025; 1991-2020 climate normal. These are area-based model data and can differ from official weather-station records.

Uruguay weather all year - average temperatures and rain

Month	Day	Night	Chance of rain
January	30℃	18℃	20%
February	29℃	18℃	27%
March	26℃	15℃	20%
April	24℃	12℃	24%
May	19℃	10℃	24%
June	17℃	7℃	14%
July	17℃	7℃	22%
August	18℃	8℃	23%
September	20℃	9℃	27%
October	23℃	12℃	27%
November	26℃	14℃	25%
December	30℃	17℃	17%

★ - months most often recommended for travel

Where is it warmest in Uruguay in January? Weather by city

For each city, we show the average daytime temperature and the warmest and coolest year. The comparison uses the average daily high across the whole of January, not a single extreme day.

Place	Day	Night	January 1981-2025	Sea	Chance of rain
Salto	32℃	19℃	Average33.4°C Warmest year2023 · 37.4°C Coolest year1998 · 28.4°C Warmest day43.2°C · 8 Jan 2006 Coolest day20.4°C · 31 Jan 2005	-	20%
Fray Bentos	31℃	18℃	Average32.2°C Warmest year2023 · 36.5°C Coolest year1998 · 28.3°C Warmest day42.5°C · 14 Jan 2022 Coolest day19.9°C · 31 Jan 2005	-	19%
Trinidad	30℃	18℃	Average31.4°C Warmest year2023 · 36.3°C Coolest year2019 · 27.9°C Warmest day42.5°C · 14 Jan 2022 Coolest day20.2°C · 1 Jan 1998	-	20%
Durazno	30℃	18℃	Average31.5°C Warmest year2023 · 36.2°C Coolest year2019 · 28.3°C Warmest day42°C · 14 Jan 2022 Coolest day20.3°C · 1 Jan 1998	-	20%
Treinta y Tres	30℃	20℃	Average29.2°C Warmest year2023 · 34°C Coolest year1999 · 26.5°C Warmest day39.5°C · 26 Jan 1990 Coolest day19.8°C · 24 Jan 1996	-	14%
Montevideo	28℃	18℃	Average26.2°C Warmest year1997 · 27.8°C Coolest year1999 · 23.2°C Warmest day35°C · 14 Jan 2022 Coolest day18.1°C · 15 Jan 1992	25℃	27%
Maldonado	25℃	20℃	Average25.3°C Warmest year1990 · 26.6°C Coolest year1999 · 22.4°C Warmest day34.3°C · 14 Jan 2022 Coolest day16.8°C · 15 Jan 1992	23℃	12%

Temperature records in Uruguay: January compared with the whole year

The comparison uses daily high temperatures from 1981-2025 for the 7 cities shown in the table.

Warmest day in January43.2°C Salto · 8 January 2006

Warmest day of the year43.5°C Salto · 9 December 2022

Coolest day in January16.8°C Maldonado · 15 January 1992

Coolest day of the year4.2°C Treinta y Tres · 18 July 1992

These are records in NASA POWER gridded data for the analysed cities, not official national weather-station records.

Travelling soon? Check the live 14-day weather forecast for Uruguay.

Uruguay weather - other months

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember