Climate and average weather in Ramallo

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

Best: late July to mid December

Over the course of the year, the temperature in Ramallo typically varies from 6°C to 30°C, and is rarely below 1°C or above 34°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 Ramallo for warm-weather activities are from mid February to mid June and late July to mid December.

Hottest
Jan
30°
Coldest
Jul
Wettest
Oct
116 mm
Driest
Jul
44 mm
Rain / yr
1038 mm
86 wet days
Daylight
9.8–14.2 h
shortest–longest
Elevation
23 m
33.5°S
Clearest
Jan
42% cloud

Ramallo 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 late July to mid December.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

The hot season lasts 4.1 months, from November 17 to March 20, with daily high temperatures above 26°C. The hottest month of the year in Ramallo is January, with an average high of 30°C and low of 19°C.

The cool season lasts 2.8 months, from May 24 to August 16, with daily high temperatures below 18°C. The coldest month of the year in Ramallo is July, with an average low of 6°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
Apr2313
May1911
Jun168
Jul166
Aug188
Sep2010
Oct2313
Nov2615
Dec2918

Average hourly temperature in Ramallo

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

Ramallo 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°1007.9145.5
Feb29° / 19°107813.26.0
Mar27° / 17°1107.612.37.1
Apr23° / 13°1068.111.27.3
May19° / 11°675.910.36.7
Jun16° / 465.19.85.7
Jul16° / 445.2105.5
Aug18° / 595.210.86.7
Sep20° / 10°686.211.87.1
Oct23° / 13°1169.912.87.1
Nov26° / 15°1107.813.77.2
Dec29° / 18°106914.26.0

Chance of rain

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

Ramallo gets about 1038 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 7.1 months, from around Sep 26 to Apr 29, peaking in October at about 31% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 26.

October is the wettest month by volume, with 116 mm over about 10 wet days; July is the driest, with 44 mm.

0%10%20%30%40%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetOct 24 · 31%Jul 26 · 15%
Rain on a day (%)Rain days
Jan268
Feb288
Mar258
Apr268
May196
Jun185
Jul165
Aug175
Sep216
Oct3010
Nov278
Dec299

Monthly rainfall

Over a full year, Ramallo collects about 1038 mm of rain across 86 wet days — roughly 86 mm in an average month.

It doesn’t fall evenly. October is the wettest month with 116 mm, while July is the driest at just 44 mm. The three wettest months alone bring about 32% of the year’s total.

0255075100125150JanFebMarAprMayJunJulAugSepOctNovDec1001071101066746445968116110106
Rainfall (mm)Rain days
Jan1008
Feb1078
Mar1108
Apr1068
May676
Jun465
Jul445
Aug595
Sep686
Oct11610
Nov1108
Dec1069

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Ramallo, 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 4 and lasts for 5.5 months, ending around April 20. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 66% of the time on average.

The cloudier part of the year begins around April 21 and lasts for 3.5 months, ending around August 4. The cloudiest month is May, when it is overcast or mostly cloudy 51% 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 16 · 67%May 22 · 46%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan6634
Feb6436
Mar6436
Apr5941
May4951
Jun4951
Jul5446
Aug5941
Sep5842
Oct5446
Nov6040
Dec6436

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 9, 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)
Jan14.06:108:09
Feb13.26:387:52
Mar12.37:027:17
Apr11.27:256:35
May10.37:486:04
Jun9.88:065:54
Jul10.08:066:05
Aug10.87:426:27
Sep11.87:006:48
Oct12.86:207:10
Nov13.75:527:38
Dec14.25:508:02

Sunny days

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

Ramallo averages about 14 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 10 and 17 days.

The sunnier stretch runs 5.7 months, from around Nov 5 to Apr 26. The sunniest month is January, with roughly 16 sunny days (bright).

The greyest month is May, down near 11 sunny days — about 30% fewer than the January peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightJan 2117 daysMay 2410 days
Sunny daysSky
Jan16Bright
Feb14Mixed
Mar15Mixed
Apr14Mixed
May11Mixed
Jun11Mixed
Jul13Mixed
Aug15Mixed
Sep14Mixed
Oct13Mixed
Nov14Mixed
Dec16Bright

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 Ramallo, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 4.8 months, from around November 17 to April 12. The muggiest month is January, when the air feels humid, muggy or worse about 73% of the time.

The most comfortable stretch runs from around April 13 to November 16, and July is the most comfortable month — the air is dry or comfortable 98% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 17 · 99%Jan 26 · 25%oppressivemuggyhumidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan10172834110
Feb11172732131
Mar2022292260
Apr452619910
May701710300
Jun85105100
Jul8992000
Aug8694000
Sep82125100
Oct612313300
Nov393122700
Dec2224301940

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 Ramallo is steady company: average speeds sit near 12 km/hcalm — in every month of the year, with no meaningful windy or calm season.

05101520JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeSep 4 · 13 km/hFeb 25 · 11 km/h
Wind speed (km/h)Feels
Jan11calm
Feb11calm
Mar11calm
Apr11calm
May11calm
Jun11calm
Jul12calm
Aug12light breeze
Sep13light breeze
Oct13light breeze
Nov12light breeze
Dec11calm

Best time to visit Ramallo

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid August, Ramallo 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 Ramallo for general outdoor tourist activities run from mid February to mid June and again from late July 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
Jan5.5fair
Feb6.0good
Mar7.1good
Apr7.3good
May6.7good
Jun5.7good
Jul5.5good
Aug6.7good
Sep7.1good
Oct7.1good
Nov7.1good
Dec6.0good

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 Ramallo for hot-weather activities is from late October to mid April, with a peak score in the third week of January.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationJan 17 · 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 Ramallo, 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, Ramallo 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 Ramallo 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 Ramallo peaks around January 14 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 14UV 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 Ramallo

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
Feb8.56.5
Mar7.55
Apr62
May30
Jun00
Jul1.50
Aug40
Sep61.5
Oct7.54.5
Nov8.56
Dec97

Air quality in Ramallo by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.

Air quality in Ramallo is worst in August — around 40 µg/m³ PM2.5 (poor), about 6.5× the cleanest month (April, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodAug 1637 µg/m³Apr 156 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb7Good
Mar7Good
Apr6Good
May8Good
Jun10Good
Jul21Moderate
Aug40Poor
Sep17Moderate
Oct13Moderate
Nov8Good
Dec8Good
Almanac & agriculture

Growing season

Chance of a frost-free day

Ramallo 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
Aug970
Sep1000
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. Ramallo banks about 2,893 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)
Jan450
Feb382
Mar364
Apr248
May151
Jun58
Jul31
Aug89
Sep149
Oct243
Nov319
Dec409

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.

Ramallo 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 19 to Mar 21. 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 117.3 kWhJun 182.3 kWh
Solar energy (kWh/m²)Level
Jan7.2Intense
Feb6.2Intense
Mar5.1Bright
Apr3.7Moderate
May2.7Moderate
Jun2.3Moderate
Jul2.6Moderate
Aug3.6Moderate
Sep4.7Bright
Oct5.6Bright
Nov6.9Intense
Dec7.3Intense

Where is Ramallo?

Ramallo sits at 33.5°S, 60.0°W, 23 m above sea level, in Argentina. The nearest listed city is San Nicolás de los Arroyos, 25 km away.

Topography around Ramallo

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

Within 3 km, the terrain around Ramallo has only modest variations in elevation — a maximum elevation change of 42 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 49 m; within 80 km, only modest variations in elevation — a maximum elevation change of 87 m.

The land around Ramallo is covered by grassland (27%), cropland (23%) and water (21%) within 3 km, cropland (44%) and wetland (36%) within 16 km, and cropland (50%) and wetland (31%) within 80 km.

3 km
42 m
16 km
49 m
80 km
87 m
treesgrasslandcroplandartificial surfaceswaterwetland
Nearby: San Nicolás de los Arroyos 25 km · San Pedro 38 km · Villa Constitución 41 km · Baradero 59 km · Arroyo Seco 60 km · Arrecifes 65 km · Pergamino 69 km · Gualeguay 75 km

Argentina travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / I
220 V · 50 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$14,898
2025
Happiness
6.4 / 10
World Happiness, 2025
Homicide rate
4.5
per 100k, 2023
Road deaths
14.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 575
Religion
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 1%

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 Ramallo (-33.4851°, -60.0063°, elevation 23 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).