Climate and average weather in Olavarría

In Olavarría, the summers are warm, showery, and mostly clear and the winters are cool and partly cloudy.

Best: early January to mid May

Over the course of the year, the temperature in Olavarría typically varies from 3°C to 28°C, and is rarely below -3°C or above 32°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 Olavarría for warm-weather activities are from early January to mid May and late September to late December.

Hottest
Jan
28°
Coldest
Jul
Wettest
Nov
94 mm
Driest
Jun
37 mm
Rain / yr
835 mm
87 wet days
Daylight
9.5–14.5 h
shortest–longest
Elevation
163 m
36.9°S
Clearest
Jan
40% cloud

Olavarría is city in Buenos Aires province, Argentina.

Density
3,738/km²
people per km²
Founded
1867

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

Olavarría 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 January to mid May.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

The hot season lasts 3.8 months, from November 22 to March 16, with daily high temperatures above 24°C. The hottest month of the year in Olavarría is January, with an average high of 28°C and low of 15°C.

The cool season lasts 2.9 months, from May 24 to August 19, with daily high temperatures below 15°C. The coldest month of the year in Olavarría is July, with an average low of 3°C and high of 12°C.

Days typically run about 11°C warmer than nights, with the widest day–night swing (around 13°C) in December.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2815
Feb2615
Mar2413
Apr2010
May167
Jun134
Jul123
Aug154
Sep176
Oct209
Nov2311
Dec2614

How hot and cold Olavarría 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 coldest nights, wind chill pulls the feels-like down to about -1°C (around July 13), with roughly 52 freezing days a year (feels-like at or below 0°C), worst in July.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan28281515
Feb26261515
Mar24241313
Apr2020810
May161647
Jun131304
Jul1212-13
Aug141514
Sep171736
Oct202069
Nov23231111
Dec26261414

Average hourly temperature in Olavarría

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 28°C, and coldest before dawn in July, near C.

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

Olavarría 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
Jan28° / 15°929.314.26.8
Feb26° / 15°757.813.47.1
Mar24° / 13°81812.37.4
Apr20° / 10°857.811.16.7
May16° / 475.710.15.6
Jun13° / 374.69.54.0
Jul12° / 385.29.73.6
Aug15° / 54510.64.9
Sep17° / 626.811.75.7
Oct20° / 909.2136.4
Nov23° / 11°948.9147.2
Dec26° / 14°808.614.57.1

Chance of rain

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

Olavarría gets about 835 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 6.9 months, from around Sep 22 to Apr 20, peaking in October at about 32% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Aug 1.

November is the wettest month by volume, with 94 mm over about 9 wet days; June is the driest, with 37 mm.

0%10%20%30%40%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetOct 31 · 32%Aug 1 · 14%
Rain on a day (%)Rain days
Jan299
Feb288
Mar268
Apr258
May186
Jun165
Jul165
Aug175
Sep237
Oct309
Nov299
Dec289

Monthly rainfall

Over a full year, Olavarría collects about 835 mm of rain across 87 wet days — roughly 70 mm in an average month.

It doesn’t fall evenly. November is the wettest month with 94 mm, while June is the driest at just 37 mm. The three wettest months alone bring about 33% of the year’s total.

0255075100125JanFebMarAprMayJunJulAugSepOctNovDec927581854737385462909480
Rainfall (mm)Rain days
Jan929
Feb758
Mar818
Apr858
May476
Jun375
Jul385
Aug545
Sep627
Oct909
Nov949
Dec809

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Olavarría, 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 31 and lasts for 5.7 months, ending around April 20. The clearest month is December, when the sky is clear, mostly clear, or partly cloudy 68% of the time on average.

The cloudier part of the year begins around April 21 and lasts for 6.3 months, ending around October 30. The cloudiest month is June, when it is overcast or mostly cloudy 55% 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 21 · 70%May 25 · 42%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan6832
Feb6436
Mar6238
Apr5644
May4555
Jun4555
Jul4753
Aug5149
Sep5050
Oct5149
Nov6139
Dec6832

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 30 min of light; the shortest, around June 9, only 9 h 30 min — a swing of roughly 5 hours.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan14.26:028:19
Feb13.46:347:58
Mar12.37:027:20
Apr11.17:306:33
May10.17:565:59
Jun9.58:175:46
Jul9.78:165:58
Aug10.67:486:23
Sep11.77:036:49
Oct13.06:177:15
Nov14.05:467:47
Dec14.55:428:13

Sunny days

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

Olavarría averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 8 and 17 days.

The sunnier stretch runs 5.1 months, from around Nov 3 to Apr 7. The sunniest month is January, with roughly 17 sunny days (bright).

The greyest month is May, down near 10 sunny days — about 42% fewer than the January peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightJan 2017 daysMay 248 days
Sunny daysSky
Jan17Bright
Feb14Bright
Mar15Mixed
Apr12Mixed
May10Mixed
Jun9Mixed
Jul10Mixed
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 Olavarría, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 3.9 months, from around December 9 to April 7. The muggiest month is January, when the air feels humid, muggy or worse about 36% of the time.

The most comfortable stretch runs from around April 8 to December 8, and July is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 1 · 100%Jan 31 · 58%muggyhumidcomfortabledryhumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan392526100
Feb362328111
Mar47262160
Apr7715720
May898300
Jun982100
Jul982000
Aug972100
Sep963100
Oct8611200
Nov7321500
Dec57251540

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 Olavarría is steady company: average speeds sit near 14 km/hlight breeze — in every month of the year, with no meaningful windy or calm season.

05101520JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeOct 1 · 15 km/hMay 13 · 13 km/h
Wind speed (km/h)Feels
Jan14light breeze
Feb14light breeze
Mar13light breeze
Apr13light breeze
May13light breeze
Jun14light breeze
Jul14light breeze
Aug14light breeze
Sep15light breeze
Oct15light breeze
Nov15light breeze
Dec15light breeze

Best time to visit Olavarría

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid January, Olavarría 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 Olavarría for general outdoor tourist activities is from late September to mid May, with a peak score in the third week of March.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationMar 18 · 7.5

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
Jan6.9good
Feb7.1good
Mar7.4good
Apr6.7good
May5.6good
Jun4.0fair
Jul3.6fair
Aug4.8fair
Sep5.7good
Oct6.4good
Nov7.2good
Dec7.1good

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 Olavarría for hot-weather activities is from mid November to late March, with a peak score in the first week of January.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationJan 1 · 7.3

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 Olavarría, 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 28°C), the essentials are light clothes, rain gear and sun protection. In the cold season around July (highs near 12°C), pack a warm layer.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, Olavarría sees daytime highs around 28°C and nights near 15°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

UV index (midday) in Olavarría 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 Olavarría peaks around January 1 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 1UV 13Jun 20UV 2
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr6High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug3Moderate
Sep5High
Oct8Very high
Nov10Extreme
Dec13Extreme

Average hourly UV index in Olavarría

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
Mar74.5
Apr5.50
May2.50
Jun00
Jul00
Aug2.50
Sep50
Oct74
Nov8.56
Dec9.57
Almanac & agriculture

Growing season

Chance of a frost-free dayReliably frost-free (≥90%)

Olavarría is mild enough that a frost-free day stays more likely than not even in midwinter. Nights are reliably above freezing from about August 30 to May 30 (274 days); outside that window a hard frost is an occasional risk.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecreliably frost-freereliably frost-freeAug 3090%May 3090%
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr990
May942
Jun8230
Jul7431
Aug8531
Sep943
Oct990
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. Olavarría banks about 1,774 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.

05001,0001,5002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan353
Feb296
Mar259
Apr142
May42
Jun0
Jul0
Aug2
Sep36
Oct125
Nov209
Dec310

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.

Olavarría receives about 4.7 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.0 and 7.7 kWh/m².

The brighter stretch of the year lasts 5.8 months, from around Sep 26 to Mar 20. The brightest month is December, averaging about 7.6 kWh/m² (intense).

The dimmest month is June, down near 2.1 kWh/m² — roughly 73% less than the December peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseDec 237.7 kWhJun 182.0 kWh
Solar energy (kWh/m²)Level
Jan7.5Intense
Feb6.4Intense
Mar4.9Bright
Apr3.5Moderate
May2.5Moderate
Jun2.1Moderate
Jul2.3Moderate
Aug3.2Moderate
Sep4.4Bright
Oct5.5Bright
Nov7.0Intense
Dec7.6Intense

Where is Olavarría?

Olavarría sits at 36.9°S, 60.3°W, 163 m above sea level, in Argentina. The nearest listed city is Azul, 43 km away.

Topography around Olavarría

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

Within 3 km, the terrain around Olavarría has only modest variations in elevation — a maximum elevation change of 24 m around an average of 164 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 181 m; within 80 km, significant variations in elevation — a maximum elevation change of 292 m.

The land around Olavarría is covered by artificial surfaces (56%) and grassland (34%) within 3 km, grassland (58%) and cropland (36%) within 16 km, and grassland (67%) and cropland (32%) within 80 km.

3 km
24 m
16 km
181 m
80 km
292 m
treesgrasslandcroplandartificial surfacesbare terrainwater
Nearby: Azul 43 km · Benito Juárez 98 km · San Carlos de Bolívar 102 km · Tandil 116 km · Las Flores 147 km · Saladillo 148 km · Coronel Pringles 152 km · Coronel Suárez 156 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 Olavarría (-36.8938°, -60.3232°, elevation 163 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).