Climate and average weather in Mercedes

In Mercedes, the summers are hot, fairly dry, and mostly clear and the winters are mild and partly cloudy.

Best: early August to mid December

Over the course of the year, the temperature in Mercedes typically varies from 7°C to 30°C, and is rarely below 1°C or above 35°C. January is the hottest month of the year, while July is the coldest.

Based on the travel score, the best times of year to visit Mercedes for warm-weather activities are from mid February to early June and early August to mid December.

Hottest
Jan
30°
Coldest
Jul
Wettest
Apr
129 mm
Driest
Jul
65 mm
Rain / yr
1187 mm
91 wet days
Daylight
9.8–14.2 h
shortest–longest
Elevation
29 m
33.3°S
Clearest
Jan
44% cloud

Mercedes is city in Uruguay.

Density
1,770/km²
people per km²
Founded
1788

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

Mercedes weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early August to mid December.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Mercedes, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 3.9 months, from November 20 to March 19, with daily high temperatures above 27°C. The hottest month of the year in Mercedes is January, with an average high of 30°C and low of 19°C.

The cool season lasts 2.9 months, from May 23 to August 19, with daily high temperatures below 18°C. The coldest month of the year in Mercedes is July, with an average low of 7°C and high of 16°C.

Days typically run about 10°C warmer than nights year-round.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan3019
Feb2919
Mar2717
Apr2314
May1911
Jun168
Jul167
Aug188
Sep2010
Oct2313
Nov2615
Dec2918

Average hourly temperature in Mercedes

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on January afternoons, near 30°C, and coldest before dawn in July, near C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Mercedes weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 19°997.6145.3
Feb29° / 19°1128.113.25.9
Mar27° / 17°1118.112.37.0
Apr23° / 14°1298.311.27.2
May19° / 11°806.710.36.6
Jun16° / 7479.85.6
Jul16° / 656.4105.4
Aug18° / 896.710.86.4
Sep20° / 10°857.511.86.7
Oct23° / 13°1229.412.87.0
Nov26° / 15°1057.513.77.2
Dec29° / 18°1178.114.26.1

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Mercedes gets about 1187 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.

The wetter season lasts 3.2 months, from around Jan 25 to Apr 30, peaking in February at about 31% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 20.

April is the wettest month by volume, with 129 mm over about 8 wet days; July is the driest, with 65 mm.

0%10%20%30%40%JanFebMarAprMayJunJulAugSepOctNovDecwetterdriermostly drysome rainoften wetFeb 6 · 31%Jul 20 · 19%
Rain on a day (%)Rain days
Jan258
Feb298
Mar278
Apr278
May227
Jun237
Jul216
Aug227
Sep258
Oct289
Nov268
Dec268

Monthly rainfall

Over a full year, Mercedes collects about 1187 mm of rain across 91 wet days — roughly 99 mm in an average month.

It doesn’t fall evenly. April is the wettest month with 129 mm, while July is the driest at just 65 mm. The three wettest months alone bring about 31% of the year’s total.

0255075100125150JanFebMarAprMayJunJulAugSepOctNovDec991121111298074658985122105117
Rainfall (mm)Rain days
Jan998
Feb1128
Mar1118
Apr1298
May807
Jun747
Jul656
Aug897
Sep858
Oct1229
Nov1058
Dec1178

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Mercedes, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.

The clearer part of the year begins around November 2 and lasts for 5.3 months, ending around April 12. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 65% of the time on average.

The cloudier part of the year begins around April 13 and lasts for 4.0 months, ending around August 11. The cloudiest month is May, when it is overcast or mostly cloudy 53% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecJan 19 · 66%May 22 · 44%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan6535
Feb6139
Mar6238
Apr5644
May4753
Jun4852
Jul4951
Aug5446
Sep5347
Oct5248
Nov5941
Dec6337

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 14 h 12 min of light; the shortest, around June 11, only 9 h 48 min — a swing of roughly 4 h 24 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan14.07:029:01
Feb13.27:308:43
Mar12.37:548:09
Apr11.28:177:28
May10.38:406:57
Jun9.88:586:47
Jul10.08:586:58
Aug10.88:337:19
Sep11.87:537:40
Oct12.87:128:02
Nov13.76:458:30
Dec14.26:438:54

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Mercedes averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 16 days.

The sunnier stretch runs 5.8 months, from around Oct 30 to Apr 23. The sunniest month is December, with roughly 15 sunny days (bright).

The greyest month is May, down near 10 sunny days — about 32% fewer than the December peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightDec 1516 daysMay 239 days
Sunny daysSky
Jan15Mixed
Feb13Mixed
Mar15Mixed
Apr13Mixed
May11Mixed
Jun10Mixed
Jul11Mixed
Aug12Mixed
Sep12Mixed
Oct12Mixed
Nov14Mixed
Dec15Bright

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Mercedes, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 4.9 months, from around November 18 to April 14. The muggiest month is February, when the air feels humid, muggy or worse about 71% of the time.

The most comfortable stretch runs from around April 15 to November 17, and July is the most comfortable month — the air is dry or comfortable 96% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 17 · 97%Feb 16 · 29%oppressivemuggyhumidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan141927309
Feb1019263212
Mar182429227
Apr422720101
May66191230
Jun8012710
Jul8511400
Aug8112600
Sep7516810
Oct54261540
Nov38312290
Dec242628184

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Wind in Mercedes is steady company: average speeds sit near 13 km/hlight breeze — in every month of the year, with no meaningful windy or calm season.

05101520JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeSep 4 · 14 km/hMay 7 · 12 km/h
Wind speed (km/h)Feels
Jan12light breeze
Feb12light breeze
Mar12calm
Apr12calm
May12calm
Jun12light breeze
Jul13light breeze
Aug13light breeze
Sep14light breeze
Oct14light breeze
Nov14light breeze
Dec13light breeze

Best time to visit Mercedes

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Mercedes throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around mid August, Mercedes is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best times of year to visit Mercedes for general outdoor tourist activities run from mid February to early June and again from early August to mid December, with a peak score in the first week of April.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationApr 1 · 7.4

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan5.4fair
Feb5.9good
Mar7.0good
Apr7.2good
May6.6good
Jun5.6good
Jul5.4fair
Aug6.4good
Sep6.7good
Oct7.1good
Nov7.2good
Dec6.1good

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Mercedes for hot-weather activities is from late October to mid April, with a peak score in the second week of December.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationDec 14 · 7.5

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Mercedes, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

For a warm-season trip around January (highs near 30°C), the essentials are light clothes and sun protection. In the cold season around July (highs near 16°C), pack a warm layer.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, Mercedes sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. About 8 days see rain.

UV index (midday) in Mercedes by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Mercedes peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 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 20UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Average hourly UV index in Mercedes

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan97
Feb86
Mar7.55
Apr5.51.5
May3.50
Jun00
Jul20
Aug40
Sep62
Oct7.54.5
Nov8.56
Dec96.5
Almanac & agriculture

Growing season

Chance of a frost-free day

Mercedes is mild enough that a frost-free day stays more likely than not even in midwinter.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDec
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May990
Jun960
Jul930
Aug960
Sep990
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Mercedes banks about 2,920 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.

01,0002,0003,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan454
Feb384
Mar368
Apr250
May154
Jun65
Jul41
Aug97
Sep146
Oct238
Nov314
Dec408

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Mercedes receives about 4.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.3 and 7.3 kWh/m².

The brighter stretch of the year lasts 6.0 months, from around Sep 21 to Mar 22. The brightest month is December, averaging about 7.3 kWh/m² (intense).

The dimmest month is June, down near 2.3 kWh/m² — roughly 68% less than the December peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseDec 127.3 kWhJun 192.3 kWh
Solar energy (kWh/m²)Level
Jan7.2Intense
Feb6.2Intense
Mar5.1Bright
Apr3.7Moderate
May2.7Moderate
Jun2.3Moderate
Jul2.5Moderate
Aug3.4Moderate
Sep4.5Bright
Oct5.5Bright
Nov6.8Intense
Dec7.3Intense

Where is Mercedes?

Mercedes sits at 33.3°S, 58.0°W, 29 m above sea level, in Uruguay. The nearest listed city is Fray Bentos, 30 km away.

Fray BentosDoloresGualeguaychúYoungCarmeloConcepción del UruguayPaysandúTrinidad

Topography around Mercedes

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

Within 3 km, the terrain around Mercedes has only modest variations in elevation — a maximum elevation change of 65 m around an average of 21 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 86 m; within 80 km, only modest variations in elevation — a maximum elevation change of 157 m.

The land around Mercedes is covered by grassland (41%) and artificial surfaces (22%) within 3 km, cropland (43%) and grassland (29%) within 16 km, and cropland (42%) and grassland (32%) within 80 km.

3 km
65 m
16 km
86 m
80 km
157 m
treesgrasslandcroplandartificial surfaceswaterwetland
Nearby: Fray Bentos 30 km · Dolores 35 km · Gualeguaychú 53 km · Young 72 km · Carmelo 86 km · Concepción del Uruguay 87 km · Paysandú 104 km · Trinidad 109 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 Mercedes (-33.2524°, -58.0305°, elevation 29 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).