Climate and average weather in Isidro Casanova

In Isidro Casanova, the summers are hot, fairly dry, and mostly clear and the winters are cool and partly cloudy.

Best: early September to late May

Over the course of the year, the temperature in Isidro Casanova typically varies from 6°C to 29°C, and is rarely below 0°C or above 33°C. January is the hottest month of the year, while July is the coldest.

Based on the travel score, the best time of year to visit Isidro Casanova for warm-weather activities is from early September to late May.

Hottest
Jan
29°
Coldest
Jul
Wettest
Oct
109 mm
Driest
Jul
60 mm
Rain / yr
957 mm
88 wet days
Daylight
9.7–14.3 h
shortest–longest
Elevation
25 m
34.7°S
Clearest
Jan
42% cloud

Isidro Casanova is city in Buenos Aires Province, Argentina.

Density
6,761/km²
people per km²
Founded
1911

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

Isidro Casanova 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 September to late May.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

The hot season lasts 4.0 months, from November 22 to March 22, with daily high temperatures above 25°C. The hottest month of the year in Isidro Casanova is January, with an average high of 29°C and low of 19°C.

The cool season lasts 2.9 months, from May 26 to August 20, with daily high temperatures below 17°C. The coldest month of the year in Isidro Casanova is July, with an average low of 6°C and high of 14°C.

Days typically run about 9°C warmer than nights year-round.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2919
Feb2818
Mar2617
Apr2213
May1810
Jun157
Jul146
Aug168
Sep189
Oct2112
Nov2415
Dec2717

Average hourly temperature in Isidro Casanova

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 29°C, and coldest before dawn in July, near C.

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

Isidro Casanova 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
Jan29° / 19°877.414.16.3
Feb28° / 18°928.213.36.8
Mar26° / 17°857.412.37.4
Apr22° / 13°917.911.27.2
May18° / 10°616.110.26.4
Jun15° / 605.99.75.0
Jul14° / 606.19.94.6
Aug16° / 625.810.75.7
Sep18° / 726.711.86.4
Oct21° / 12°1099.112.96.7
Nov24° / 15°938.413.87.3
Dec27° / 17°858.614.36.8

Chance of rain

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

Isidro Casanova gets about 957 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 1.7 months, from around Jan 24 to Mar 16, peaking in February at about 31% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 27.

October is the wettest month by volume, with 109 mm over about 9 wet days; July is the driest, with 60 mm.

0%10%20%30%40%JanFebMarAprMayJunJulAugSepOctNovDecwetterdriermostly drysome rainoften wetFeb 6 · 31%Jul 27 · 17%
Rain on a day (%)Rain days
Jan257
Feb298
Mar247
Apr258
May206
Jun206
Jul196
Aug196
Sep227
Oct289
Nov288
Dec289

Monthly rainfall

Over a full year, Isidro Casanova collects about 957 mm of rain across 88 wet days — roughly 80 mm in an average month.

It doesn’t fall evenly. October is the wettest month with 109 mm, while July is the driest at just 60 mm. The three wettest months alone bring about 31% of the year’s total.

0255075100125150JanFebMarAprMayJunJulAugSepOctNovDec8792859161606062721099385
Rainfall (mm)Rain days
Jan877
Feb928
Mar857
Apr918
May616
Jun606
Jul606
Aug626
Sep727
Oct1099
Nov938
Dec859

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Isidro Casanova, 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 5.2 months, ending around April 10. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 67% of the time on average.

The cloudier part of the year begins around April 29 and lasts for 6.2 months, ending around November 3. The cloudiest month is June, 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 · 68%May 28 · 44%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan6733
Feb6535
Mar6337
Apr5743
May4951
Jun4753
Jul4951
Aug5248
Sep5248
Oct5149
Nov6040
Dec6535

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 18 min of light; the shortest, around June 9, only 9 h 42 min — a swing of roughly 4 h 36 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan14.16:018:06
Feb13.36:307:48
Mar12.36:567:12
Apr11.27:216:28
May10.27:455:56
Jun9.78:045:45
Jul9.98:035:56
Aug10.77:386:19
Sep11.86:556:42
Oct12.96:137:06
Nov13.85:447:35
Dec14.35:418:00

Sunny days

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

Isidro Casanova 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 17 days.

The sunnier stretch runs 5.6 months, from around Nov 10 to Apr 29. The sunniest month is January, with roughly 16 sunny days (bright).

The greyest month is May, down near 11 sunny days — about 33% fewer than the January peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightJan 2017 daysMay 289 days
Sunny daysSky
Jan17Bright
Feb14Bright
Mar15Mixed
Apr13Mixed
May11Mixed
Jun10Mixed
Jul11Mixed
Aug12Mixed
Sep11Mixed
Oct11Mixed
Nov13Mixed
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 Isidro Casanova, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 5.0 months, from around November 13 to April 12. 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 13 to November 12, and July is the most comfortable month — the air is dry or comfortable 99% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 18 · 99%Feb 16 · 28%oppressivemuggyhumidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan121926349
Feb1316263312
Mar222029255
Apr46271980
May7118910
Jun879400
Jul918100
Aug889300
Sep8213410
Oct59261320
Nov39302380
Dec242329204

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 Isidro Casanova 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 3 · 15 km/hMay 3 · 12 km/h
Wind speed (km/h)Feels
Jan13light breeze
Feb13light breeze
Mar13light breeze
Apr13light breeze
May13light breeze
Jun13light breeze
Jul13light breeze
Aug14light breeze
Sep15light breeze
Oct14light breeze
Nov14light breeze
Dec14light breeze

Best time to visit Isidro Casanova

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid September, Isidro Casanova 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 time of year to visit Isidro Casanova for general outdoor tourist activities is from early September to late May, with a peak score in the last week of March.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationMar 27 · 7.6

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
Jan6.3good
Feb6.8good
Mar7.4good
Apr7.2good
May6.4good
Jun5.0fair
Jul4.6fair
Aug5.7good
Sep6.4good
Oct6.8good
Nov7.2good
Dec6.8good

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 Isidro Casanova for hot-weather activities is from mid November to early April, with a peak score in the third week of January.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationJan 17 · 7.7

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 Isidro Casanova, 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 29°C), the essentials are light clothes and sun protection. In the cold season around July (highs near 14°C), pack a warm layer.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, Isidro Casanova sees daytime highs around 29°C and nights near 19°C. Pack light clothes and sun protection. About 7 days see rain.

Sea temperature near Isidro Casanova

Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.

The sea at the nearest coast (about 21 km away) is warmest in January at about 25°C and coldest in July near 13°C.

It's comfortable for a long swim from Nov 9 to Apr 20 — about 5.4 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar23Refreshing
Apr21Refreshing
May17Cool
Jun14Bracing
Jul13Bracing
Aug13Bracing
Sep15Cool
Oct18Cool
Nov21Refreshing
Dec23Refreshing

UV index (midday) in Isidro Casanova 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 Isidro Casanova peaks around January 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 14UV 12Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Average hourly UV index in Isidro Casanova

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
Mar7.55
Apr5.51
May2.50
Jun00
Jul00
Aug3.50
Sep5.50
Oct74
Nov8.56
Dec96.5

Air quality in Isidro Casanova 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 Isidro Casanova is worst in June — around 25 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2325 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar16Moderate
Apr17Moderate
May22Moderate
Jun25Moderate
Jul25Moderate
Aug24Moderate
Sep19Moderate
Oct16Moderate
Nov13Moderate
Dec12Moderate
Almanac & agriculture

Growing season

Chance of a frost-free day

Isidro Casanova 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
Jun950
Jul920
Aug970
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. Isidro Casanova banks about 2,552 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.

01,0002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan422
Feb361
Mar343
Apr224
May125
Jun32
Jul5
Aug60
Sep114
Oct206
Nov283
Dec379

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.

Isidro Casanova receives about 4.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.2 and 7.5 kWh/m².

The brighter stretch of the year lasts 5.9 months, from around Sep 23 to Mar 21. The brightest month is December, averaging about 7.4 kWh/m² (intense).

The dimmest month is June, down near 2.2 kWh/m² — roughly 70% less than the December peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseDec 137.5 kWhJun 192.2 kWh
Solar energy (kWh/m²)Level
Jan7.3Intense
Feb6.3Intense
Mar5.0Bright
Apr3.7Moderate
May2.7Moderate
Jun2.2Moderate
Jul2.4Moderate
Aug3.3Moderate
Sep4.5Bright
Oct5.5Bright
Nov6.9Intense
Dec7.5Intense

Where is Isidro Casanova?

Isidro Casanova sits at 34.7°S, 58.6°W, 25 m above sea level, in Argentina. The nearest listed city is San Justo, 3.0 km away.

Topography around Isidro Casanova

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

Within 3 km, the terrain around Isidro Casanova has only modest variations in elevation — a maximum elevation change of 28 m around an average of 27 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 62 m; within 80 km, only modest variations in elevation — a maximum elevation change of 98 m.

The land around Isidro Casanova is covered by artificial surfaces (91%) within 3 km, artificial surfaces (63%) within 16 km, and grassland (31%) and cropland (25%) within 80 km.

3 km
28 m
16 km
62 m
80 km
98 m
treesgrasslandcroplandartificial surfaceswaterwetland
Nearby: San Justo 3.0 km · Morón 6.0 km · Haedo 6.0 km · Castelar 7.0 km · Villa Sarmiento 8.0 km · El Palomar 9.0 km · Villa Lugano 11 km · San Antonio de Padua 11 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 Isidro Casanova (-34.7°, -58.5874°, elevation 25 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).