Climate and average weather in Belén

In Belén, the summers are hot, showery, and mostly clear and the winters are mild and clear.

Best: mid March to early December

Over the course of the year, the temperature in Belén typically varies from 5°C to 29°C, and is rarely below 0°C or above 34°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 Belén for warm-weather activities is from mid March to early December.

Hottest
Dec
29°
Coldest
Jul
Wettest
Jan
96 mm
Driest
Jun
14 mm
Rain / yr
565 mm
80 wet days
Daylight
10.2–13.8 h
shortest–longest
Elevation
1,223 m
27.6°S
Clearest
Aug
20% cloud

Belén is city in Catamarca province, Argentina.

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

Belén 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 Belén, 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 6 to March 10, with daily high temperatures above 26°C. The hottest month of the year in Belén is December, with an average high of 29°C and low of 17°C.

The cool season lasts 3.0 months, from May 16 to August 14, with daily high temperatures below 20°C. The coldest month of the year in Belén is July, with an average low of 5°C and high of 18°C.

Days typically run about 11°C warmer than nights year-round.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2818
Feb2717
Mar2616
Apr2313
May209
Jun186
Jul185
Aug207
Sep2210
Oct2513
Nov2715
Dec2917

Average hourly temperature in Belén

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

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

Belén weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 18°9612.8013.65.5
Feb27° / 17°8010.10136.4
Mar26° / 16°7510.4012.26.9
Apr23° / 13°487.5011.47.6
May20° / 295010.77.5
Jun18° / 142.50.210.37.5
Jul18° / 142.50.610.47.4
Aug20° / 162.80.3118.1
Sep22° / 10°304.40.311.88.2
Oct25° / 13°415.9012.78.0
Nov27° / 15°547.3013.47.2
Dec29° / 17°719.2013.76.1

Chance of rain

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

Belén gets about 565 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 5.7 months, from around Oct 28 to Apr 20, peaking in January at about 43% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 18.

January is the wettest month by volume, with 96 mm over about 13 wet days; June is the driest, with 14 mm.

0%10%20%30%40%50%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetJan 15 · 43%Jun 18 · 8%
Rain on a day (%)Rain days
Jan4113
Feb3710
Mar3410
Apr258
May165
Jun93
Jul83
Aug93
Sep144
Oct196
Nov247
Dec309

Monthly rainfall

Over a full year, Belén collects about 565 mm of rain across 80 wet days — roughly 47 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 96 mm, while June is the driest at just 14 mm. The three wettest months alone bring about 44% of the year’s total, and some of the cold-season precipitation falls as snow.

0255075100125JanFebMarAprMayJunJulAugSepOctNovDec968075482914141630415471
Rainfall (mm)Rain daysSnow days
Jan96130
Feb80100
Mar75100
Apr4880
May2950
Jun1430
Jul1431
Aug1630
Sep3040
Oct4160
Nov5470
Dec7190

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Belén, 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 April 22 and lasts for 6.5 months, ending around November 6. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 87% of the time on average.

The cloudier part of the year begins around November 7 and lasts for 5.5 months, ending around April 21. The cloudiest month is January, when it is overcast or mostly cloudy 44% 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 25 · 88%Jan 12 · 55%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan5644
Feb5941
Mar6139
Apr7129
May7624
Jun8218
Jul8713
Aug8713
Sep8317
Oct7921
Nov7327
Dec6733

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 December 21, brings about 13 h 48 min of light; the shortest, around June 22, only 10 h 12 min — a swing of roughly 3 h 36 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan13.66:508:25
Feb13.07:138:12
Mar12.27:327:44
Apr11.47:487:09
May10.78:056:43
Jun10.38:206:36
Jul10.48:216:46
Aug11.08:027:02
Sep11.87:277:18
Oct12.76:537:33
Nov13.46:327:55
Dec13.76:328:16

Sunny days

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

Belén averages about 18 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 10 and 25 days.

The sunnier stretch runs 6.4 months, from around Apr 19 to Oct 30. The sunniest month is July, with roughly 24 sunny days (brilliant).

The greyest month is January, down near 10 sunny days — about 58% fewer than the July peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 2325 daysJan 1610 days
Sunny daysSky
Jan10Mixed
Feb11Mixed
Mar14Mixed
Apr17Bright
May20Bright
Jun22Bright
Jul25Brilliant
Aug25Brilliant
Sep23Bright
Oct21Bright
Nov17Bright
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 Belén, how humid it feels changes noticeably over the year.

The more humid part of the year lasts 3.5 months, from around December 15 to March 31. The muggiest month is January, when the air feels humid, muggy or worse about 23% of the time.

The most comfortable stretch runs from around April 1 to December 14, and May 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%JanFebMarAprMayJunJulAugSepOctNovDecMay 2 · 100%Jan 9 · 76%humidcomfortabledryhumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)
Jan3542221
Feb3745171
Mar5038120
Apr861320
May99100
Jun100000
Jul100000
Aug100000
Sep100000
Oct97300
Nov851400
Dec623080

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 Belén is steady company: average speeds sit near 5 km/hcalm — in every month of the year, with no meaningful windy or calm season.

0510JanFebMarAprMayJunJulAugSepOctNovDeccalmNov 2 · 7 km/hMay 16 · 4 km/h
Wind speed (km/h)Feels
Jan6calm
Feb5calm
Mar5calm
Apr5calm
May4calm
Jun4calm
Jul5calm
Aug5calm
Sep6calm
Oct6calm
Nov6calm
Dec6calm

Hazard calendar for Belén

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

Belén's rainy season runs November–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best time to visit Belén

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late March, Belén 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 Belén for general outdoor tourist activities is from mid March to early December, with a peak score in the first week of October.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationOct 3 · 8.4

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
Jan5.6good
Feb6.4good
Mar6.9good
Apr7.6ideal
May7.5good
Jun7.5ideal
Jul7.4good
Aug8.0ideal
Sep8.2ideal
Oct8.0ideal
Nov7.2good
Dec6.1good

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 Belén for hot-weather activities is from late September to mid April, with a peak score in the third week of December.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationDec 16 · 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 Belén, 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 29°C), the essentials are light clothes, rain gear and sun protection. In the cold season around July (highs near 18°C), pack a warm layer.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In December, Belén sees daytime highs around 29°C and nights near 17°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

UV index (midday) in Belén 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 Belén peaks around January 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 16Jul 10UV 5
UV index (midday)Level
Jan16Extreme
Feb16Extreme
Mar13Extreme
Apr8Very high
May6High
Jun5Moderate
Jul5Moderate
Aug7Very high
Sep10Very high
Oct13Extreme
Nov14Extreme
Dec16Extreme

Average hourly UV index in Belén

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 7.5 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)
Jan97.5
Feb97
Mar86
Apr6.54
May5.51.5
Jun4.50
Jul4.50
Aug63
Sep75
Oct8.56.5
Nov97
Dec9.57.5
Almanac & agriculture

Growing season

Chance of a frost-free day

Belén 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
May1000
Jun990
Jul950
Aug990
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. Belén banks about 2,845 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)
Jan410
Feb338
Mar330
Apr233
May138
Jun67
Jul43
Aug105
Sep174
Oct275
Nov333
Dec400

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.

Belén receives about 5.7 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.8 and 7.6 kWh/m².

The brighter stretch of the year lasts 6.1 months, from around Sep 7 to Mar 12. The brightest month is December, averaging about 7.5 kWh/m² (intense).

The dimmest month is June, down near 3.8 kWh/m² — roughly 50% less than the December peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseDec 207.6 kWhJun 173.8 kWh
Solar energy (kWh/m²)Level
Jan7.0Intense
Feb6.5Intense
Mar5.6Bright
Apr4.7Bright
May4.0Bright
Jun3.8Moderate
Jul4.1Bright
Aug5.0Bright
Sep6.0Intense
Oct6.9Intense
Nov7.4Intense
Dec7.5Intense

Where is Belén?

Belén sits at 27.6°S, 67.0°W, 1,223 m above sea level, in Argentina. The nearest listed city is Aimogasta, 103 km away.

Topography around Belén

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

Within 3 km, the terrain around Belén has large variations in elevation — a maximum elevation change of 639 m around an average of 1,356 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,489 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,148 m.

The land around Belén is covered by shrubs (60%) within 3 km, shrubs (83%) within 16 km, and bare terrain (40%), shrubs (32%) and grassland (27%) within 80 km.

3 km
639 m
16 km
1,489 m
80 km
4,148 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
Nearby: Aimogasta 103 km · Aguilares 141 km · Santa María 144 km · Catamarca 152 km · San Isidro 156 km · Monteros 160 km · Famaillá 174 km · Chilecito 174 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 Belén (-27.6495°, -67.0263°, elevation 1,223 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).