Climate and average weather in Chajarí

In Chajarí, the summers are humid, hot, showery, and mostly clear and the winters are mild and partly cloudy.

Best: mid March to early December

Over the course of the year, the temperature in Chajarí typically varies from 9°C to 31°C, and is rarely below 2°C or above 36°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 Chajarí for warm-weather activities is from mid March to early December.

Hottest
Jan
31°
Coldest
Jul
Wettest
Apr
165 mm
Driest
Jul
80 mm
Rain / yr
1361 mm
98 wet days
Daylight
10.0–14.0 h
shortest–longest
Elevation
35 m
30.8°S
Clearest
Nov
44% cloud

Chajarí is city in Argentina.

Founded
1872

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

Chajarí 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 mid March to early December.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Chajarí, 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 19 to March 19, with daily high temperatures above 28°C. The hottest month of the year in Chajarí is January, with an average high of 31°C and low of 21°C.

The cool season lasts 2.9 months, from May 20 to August 15, with daily high temperatures below 20°C. The coldest month of the year in Chajarí is July, with an average low of 9°C and high of 18°C.

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

10°20°30°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan3121
Feb3020
Mar2819
Apr2515
May2112
Jun1810
Jul189
Aug2010
Sep2212
Oct2515
Nov2817
Dec3019

How hot and cold Chajarí really feels

Feels-like highFeels-like lowactual air temp

The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.

On the hottest afternoons, once humidity is folded in, Chajarí feels like about 33°C (around January 5). About 38 days a year carry some heat stress, peaking in January.

10°15°20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan32312121
Feb31302020
Mar29281819
Apr25251515
May21211212
Jun1818810
Jul181869
Aug2020910
Sep22221212
Oct25251515
Nov28281717
Dec30301919

Average hourly temperature in Chajarí

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 31°C, and coldest before dawn in July, near C.

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

Chajarí 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
Jan31° / 21°1248.613.84.7
Feb30° / 20°117913.15.1
Mar28° / 19°1158.812.26.3
Apr25° / 15°165911.37.2
May21° / 12°997.310.56.8
Jun18° / 10°937.7106.3
Jul18° / 806.810.26.4
Aug20° / 10°886.810.97.0
Sep22° / 12°987.811.87.1
Oct25° / 15°1539.912.87.0
Nov28° / 17°1187.313.66.8
Dec30° / 19°1128.6145.3

Chance of rain

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

Chajarí gets about 1361 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 3.4 months, from around Dec 8 to Mar 21, peaking in February at about 33% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Aug 4.

April is the wettest month by volume, with 165 mm over about 9 wet days; July is the driest, with 80 mm.

0%10%20%30%40%JanFebMarAprMayJunJulAugSepOctNovDecwetterdriermostly drysome rainoften wetFeb 24 · 33%Aug 4 · 20%
Rain on a day (%)Rain days
Jan289
Feb329
Mar299
Apr299
May247
Jun268
Jul227
Aug227
Sep278
Oct3110
Nov257
Dec289

Monthly rainfall

Over a full year, Chajarí collects about 1361 mm of rain across 98 wet days — roughly 113 mm in an average month.

It doesn’t fall evenly. April is the wettest month with 165 mm, while July is the driest at just 80 mm. The three wettest months alone bring about 32% of the year’s total.

0255075100125150175200JanFebMarAprMayJunJulAugSepOctNovDec1241171151659993808898153118112
Rainfall (mm)Rain days
Jan1249
Feb1179
Mar1159
Apr1659
May997
Jun938
Jul807
Aug887
Sep988
Oct15310
Nov1187
Dec1129

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Chajarí, 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 October 29 and lasts for 5.3 months, ending around April 8. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 64% of the time on average.

The cloudier part of the year begins around April 9 and lasts for 3.4 months, ending around July 20. The cloudiest month is June, when it is overcast or mostly cloudy 54% 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 17 · 66%Jun 19 · 44%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan6436
Feb6139
Mar6139
Apr5644
May4852
Jun4654
Jul5446
Aug6040
Sep5545
Oct5347
Nov6139
Dec6139

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 hours of light; the shortest, around June 12, only 10 hours — a swing of roughly 4 hours.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan13.86:087:55
Feb13.16:337:40
Mar12.26:557:09
Apr11.37:156:30
May10.57:356:02
Jun10.07:525:53
Jul10.27:526:03
Aug10.97:306:22
Sep11.86:526:41
Oct12.86:147:00
Nov13.65:507:25
Dec14.05:497:48

Sunny days

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

Chajarí averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 10 and 16 days.

The sunnier stretch runs 5.7 months, from around Oct 31 to Apr 23. The sunniest month is January, with roughly 15 sunny days (bright).

The greyest month is May, down near 11 sunny days — about 29% fewer than the January peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightJan 1816 daysMay 2110 days
Sunny daysSky
Jan16Bright
Feb13Mixed
Mar15Mixed
Apr14Mixed
May11Mixed
Jun10Mixed
Jul13Mixed
Aug15Mixed
Sep13Mixed
Oct13Mixed
Nov14Mixed
Dec15Mixed

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

The more humid part of the year lasts 5.8 months, from around October 24 to April 17. The muggiest month is January, when the air feels humid, muggy or worse about 82% of the time.

The most comfortable stretch runs from around April 18 to October 23, and July is the most comfortable month — the air is dry or comfortable 88% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 24 · 90%Jan 31 · 16%oppressivemuggyhumidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan6122432242
Feb4132334232
Mar10163028151
Apr2925221860
May542017910
Jun671613400
Jul741411100
Aug691811200
Sep622014400
Oct3924241210
Nov2429261930
Dec13212527131

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.

Across the year, average wind speed in Chajarí is typically light breeze, near 14 km/h, and varies little with the seasons.

The windier part of the year lasts 5.0 months, from around Jul 4 to Dec 3. The windiest month is September, averaging about 16 km/h (light breeze).

The calmer part of the year runs from around Dec 4 to Jul 3, with February the calmest month at about 13 km/h.

05101520JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezeSep 4 · 16 km/hFeb 28 · 12 km/h
Wind speed (km/h)Feels
Jan13light breeze
Feb13light breeze
Mar12light breeze
Apr13light breeze
May13light breeze
Jun13light breeze
Jul14light breeze
Aug15light breeze
Sep16light breeze
Oct15light breeze
Nov14light breeze
Dec13light breeze

Best time to visit Chajarí

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late November, Chajarí is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

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 Chajarí for general outdoor tourist activities is from mid March to early December, with a peak score in the third week of April.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationApr 21 · 7.3

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
Jan4.7fair
Feb5.1fair
Mar6.2good
Apr7.2good
May6.9good
Jun6.3good
Jul6.4good
Aug7.0good
Sep7.1good
Oct7.1good
Nov6.8good
Dec5.3fair

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 Chajarí for hot-weather activities is from mid October to late April, with a peak score in the last week of November.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationNov 28 · 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 Chajarí, 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 31°C), the essentials are light clothes, rain gear and sun protection. In the cold season around July (highs near 18°C), pack a light layer.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, Chajarí sees daytime highs around 31°C and nights near 21°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

UV index (midday) in Chajarí 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 Chajarí peaks around January 20 at about 13 (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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 20UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar11Extreme
Apr7Very high
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5High
Sep7High
Oct7Very high
Nov11Extreme
Dec12Extreme

Average hourly UV index in Chajarí

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
Mar7.55.5
Apr63
May40
Jun20
Jul30
Aug50
Sep6.52.5
Oct73.5
Nov8.56
Dec96.5
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Chajarí is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun970
Jul950
Aug980
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

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. Chajarí banks about 3,534 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)
Jan496
Feb424
Mar415
Apr300
May200
Jun120
Jul100
Aug158
Sep208
Oct299
Nov364
Dec452

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.

Chajarí receives about 4.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.4 and 7.2 kWh/m².

The brighter stretch of the year lasts 6.1 months, from around Sep 21 to Mar 25. The brightest month is December, averaging about 7.1 kWh/m² (intense).

The dimmest month is June, down near 2.4 kWh/m² — roughly 66% less than the December peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseDec 107.2 kWhJun 212.4 kWh
Solar energy (kWh/m²)Level
Jan7.0Intense
Feb6.1Intense
Mar5.2Bright
Apr3.8Moderate
May2.9Moderate
Jun2.4Moderate
Jul2.8Moderate
Aug3.6Moderate
Sep4.6Bright
Oct5.5Bright
Nov6.8Intense
Dec7.1Intense

Where is Chajarí?

Chajarí sits at 30.8°S, 58.0°W, 35 m above sea level, in Argentina. The nearest listed city is Monte Caseros, 65 km away.

Topography around Chajarí

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

Within 3 km, the terrain around Chajarí has only modest variations in elevation — a maximum elevation change of 38 m around an average of 58 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 58 m; within 80 km, only modest variations in elevation — a maximum elevation change of 163 m.

The land around Chajarí is covered by grassland (56%) and artificial surfaces (28%) within 3 km, grassland (57%) and trees (35%) within 16 km, and grassland (72%) within 80 km.

3 km
38 m
16 km
58 m
80 km
163 m
treesgrasslandcroplandartificial surfaceswater
Nearby: Monte Caseros 65 km · Salto 70 km · Concordia 71 km · Federal 79 km · Curuzú Cuatiá 107 km · Uruguaiana 140 km · Paso de los Libres 144 km · Artigas 150 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 Chajarí (-30.7548°, -57.982°, elevation 35 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).