Climate and average weather in Santa María

In Santa María, the summers are warm, fairly dry, and mostly clear and the winters are mild and clear.

Best: late January to late December

Over the course of the year, the temperature in Santa María typically varies from -0°C to 23°C, and is rarely below -6°C or above 27°C. December is the hottest month of the year, while July is the coldest.

Based on the travel score, the best time of year to visit Santa María for warm-weather activities is from late January to late December.

Hottest
Dec
23°
Coldest
Jul
-0°
Wettest
Jan
68 mm
Driest
Jul
2 mm
Rain / yr
229 mm
48 wet days
Daylight
10.3–13.7 h
shortest–longest
Elevation
1,877 m
26.7°S
Clearest
Aug
17% cloud

Santa María is human settlement in Catamarca province, Argentina.

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

Santa María 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 January to late December.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Santa María stay fairly even through the year, without a distinct hot or cool season. The warmest month is December, with an average high of 23°C and low of 11°C; the coolest is July, with an average low of -0°C and high of 17°C.

Days typically run about 14°C warmer than nights, with the widest day–night swing (around 17°C) in July.

-10°10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2312
Feb2211
Mar2210
Apr217
May194
Jun171
Jul170
Aug181
Sep204
Oct218
Nov2210
Dec2311

How hot and cold Santa María 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 -3°C (around July 21), with roughly 86 freezing days a year (feels-like at or below 0°C), worst in July.

-5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan22231212
Feb22221111
Mar22221010
Apr212167
May181924
Jun1717-11
Jul1717-30
Aug1818-11
Sep202024
Oct212168
Nov2222910
Dec23231111

Average hourly temperature in Santa María

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 December afternoons, near 23°C, and coldest before dawn in July, near -0°C.

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

Santa María 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
Jan23° / 12°6811.613.56.5
Feb22° / 11°448.812.96.8
Mar22° / 10°306.312.27.5
Apr21° / 112.511.48.1
May19° / 4110.77.9
Jun17° / 20.610.47.5
Jul17° / -0°20.610.57.2
Aug18° / 3111.18.0
Sep20° / 51.311.88.2
Oct21° / 112.812.68.1
Nov22° / 10°184.513.37.8
Dec23° / 11°327.413.67.4

Chance of rain

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

Santa María gets about 229 mm of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.

The wetter season lasts 5.2 months, from around Oct 29 to Apr 3, peaking in January at about 39% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 8.

January is the wettest month by volume, with 68 mm over about 12 wet days; July is the driest, with 2 mm.

0%10%20%30%40%50%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetJan 15 · 39%Jun 8 · 1%
Rain on a day (%)Rain days
Jan3712
Feb319
Mar206
Apr83
May31
Jun21
Jul21
Aug31
Sep41
Oct93
Nov155
Dec247

Monthly rainfall

Over a full year, Santa María collects about 229 mm of rain across 48 wet days — roughly 19 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 68 mm, while July is the driest at just 2 mm. The three wettest months alone bring about 63% of the year’s total.

0255075100JanFebMarAprMayJunJulAugSepOctNovDec6844301142235111832
Rainfall (mm)Rain days
Jan6812
Feb449
Mar306
Apr113
May41
Jun21
Jul21
Aug31
Sep51
Oct113
Nov185
Dec327

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Santa María, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around March 30 and lasts for 8.0 months, ending around November 26. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 93% of the time on average.

The cloudier part of the year begins around November 27 and lasts for 4.0 months, ending around March 29. The cloudiest month is January, when it is overcast or mostly cloudy 45% 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%JanFebMarAprMayJunJulAugSepOctNovDecJul 30 · 94%Jan 13 · 53%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan5545
Feb6436
Mar7525
Apr8713
May8911
Jun8911
Jul919
Aug937
Sep919
Oct8713
Nov8317
Dec7030

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 13 h 42 min of light; the shortest, around June 13, only 10 h 18 min — a swing of roughly 3 h 24 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan13.56:488:19
Feb12.97:118:07
Mar12.27:287:40
Apr11.47:437:05
May10.78:006:41
Jun10.48:146:34
Jul10.58:166:44
Aug11.17:577:00
Sep11.87:237:14
Oct12.66:507:29
Nov13.36:297:50
Dec13.66:308:10

Sunny days

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

Santa María averages about 19 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 7 and 26 days.

The sunnier stretch runs 7.0 months, from around Mar 31 to Oct 28. The sunniest month is July, with roughly 25 sunny days (brilliant).

The greyest month is January, down near 8 sunny days — about 69% fewer than the July peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 2926 daysJan 137 days
Sunny daysSky
Jan8Gloomy
Feb10Mixed
Mar16Bright
Apr22Bright
May24Brilliant
Jun24Brilliant
Jul26Brilliant
Aug26Brilliant
Sep24Brilliant
Oct21Bright
Nov16Bright
Dec12Mixed

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 Santa María, the air stays dry or comfortable essentially all year. Even in January, the muggiest month, it feels humid or worse only about 0% of the time — humidity is not something you need to plan around here.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecdry
Dry (%)
Jan100
Feb100
Mar100
Apr100
May100
Jun100
Jul100
Aug100
Sep100
Oct100
Nov100
Dec100

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 Santa María is steady company: average speeds sit near 6 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeOct 3 · 7 km/hJan 25 · 5 km/h
Wind speed (km/h)Feels
Jan6calm
Feb6calm
Mar6calm
Apr6calm
May6calm
Jun6calm
Jul7calm
Aug7calm
Sep7calm
Oct7calm
Nov7calm
Dec6calm

Best time to visit Santa María

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late December, Santa María 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 Santa María for general outdoor tourist activities is from late January to mid January, with a peak score in the third week of April.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationApr 20 · 8.2

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
Jan6.6good
Feb6.8good
Mar7.5good
Apr8.1ideal
May7.9ideal
Jun7.5good
Jul7.2good
Aug8.0ideal
Sep8.2ideal
Oct8.1ideal
Nov7.8ideal
Dec7.4good

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 Santa María for hot-weather activities is from early October to late April, with a peak score in the third week of December.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationDec 19 · 5.7

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 Santa María, 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 December (highs near 23°C), the essentials are light clothes and sun protection. In the cold season around July (highs near 17°C), pack a warm layer and sun protection.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In December, Santa María sees daytime highs around 23°C and nights near 11°C. Pack sun protection. Worth having: light clothes. About 7 days see rain.

UV index (midday) in Santa María 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 Santa María peaks around January 17 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 17UV 17Jul 10UV 5
UV index (midday)Level
Jan17Extreme
Feb16Extreme
Mar14Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep11Extreme
Oct15Extreme
Nov15Extreme
Dec16Extreme

Average hourly UV index in Santa María

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 9.5 hours a day reach index 3 (protection recommended), and 7.5 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)
Jan9.57.5
Feb97
Mar86.5
Apr74.5
May5.52.5
Jun50
Jul50
Aug6.53.5
Sep7.55.5
Oct8.57
Nov97
Dec9.57.5
Almanac & agriculture

Growing season

Chance of a frost-free dayTypical season (≥50%)

The growing season in Santa María typically lasts about 336 days, from around July 31 to July 1 — the span where a frost-free day is more likely than not. It is reliably frost-free from September 22 to May 16.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecgrowing seasongrowing seasonJul 3150%Sep 2290%May 1690%Jul 150%
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr990
May8715
Jun6130
Jul4631
Aug6431
Sep8524
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. Santa María banks about 1,350 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.

05001,0001,500JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan223
Feb187
Mar187
Apr122
May33
Jun0
Jul0
Aug6
Sep55
Oct141
Nov177
Dec221

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.

Santa María receives about 5.9 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.3 and 7.3 kWh/m².

The brighter stretch of the year lasts 6.3 months, from around Aug 28 to Mar 6. The brightest month is November, averaging about 7.2 kWh/m² (intense).

The dimmest month is June, down near 4.3 kWh/m² — roughly 40% less than the November peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseNov 187.3 kWhJun 224.3 kWh
Solar energy (kWh/m²)Level
Jan6.5Intense
Feb6.2Intense
Mar5.7Bright
Apr5.2Bright
May4.6Bright
Jun4.3Bright
Jul4.6Bright
Aug5.5Bright
Sep6.5Intense
Oct7.1Intense
Nov7.3Intense
Dec7.1Intense

Where is Santa María?

Santa María sits at 26.7°S, 66.0°W, 1,877 m above sea level, in Argentina. The nearest listed city is Cafayate, 69 km away.

Topography around Santa María

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

Within 3 km, the terrain around Santa María has only modest variations in elevation — a maximum elevation change of 142 m around an average of 1,895 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,775 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,170 m.

The land around Santa María is covered by bare terrain (46%) within 3 km, grassland (33%), bare terrain (33%) and shrubs (30%) within 16 km, and grassland (39%), bare terrain (30%) and trees (22%) within 80 km.

3 km
142 m
16 km
1,775 m
80 km
5,170 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
Nearby: Cafayate 69 km · Famaillá 76 km · Monteros 76 km · Yerba Buena 76 km · Tafí Viejo 78 km · Bella Vista 83 km · San Miguel de Tucuman 84 km · Alderetes 91 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 Santa María (-26.6946°, -66.0481°, elevation 1,877 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).