Climate and average weather in Calama

In Calama, the weather is warm, dry, and mostly clear and remarkably steady, with daytime highs holding near warm levels all year. The wettest stretch peaks around February.

Best: early January to late December

Over the course of the year, the temperature in Calama typically varies from 3°C to 23°C, and is rarely below 0°C or above 25°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 Calama for warm-weather activities is from early January to late December.

Hottest
Dec
23°
Coldest
Jul
Wettest
Feb
11 mm
Driest
Oct
0 mm
Rain / yr
43 mm
9 wet days
Daylight
10.6–13.4 h
shortest–longest
Elevation
2,275 m
22.5°S
Clearest
Sep
10% cloud

Calama is city in Chile.

Air quality
Good
PM2.5 6.8 µg/m³ · 2019
Density
4,838/km²
people per km²

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

Calama 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 late December.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Calama 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 9°C; the coolest is July, with an average low of 3°C and high of 19°C.

Days typically run about 15°C warmer than nights, with the widest day–night swing (around 16°C) in July.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2210
Feb2210
Mar229
Apr227
May205
Jun193
Jul193
Aug204
Sep216
Oct227
Nov238
Dec239

How hot and cold Calama 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 14), with roughly 45 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)
Jan2222910
Feb2222910
Mar222279
Apr222247
May202025
Jun191903
Jul191903
Aug202014
Sep212136
Oct222257
Nov232368
Dec232379

Average hourly temperature in Calama

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 C.

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

Calama 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
Jan22° / 10°92.413.28.2
Feb22° / 10°112.712.88.2
Mar22° / 61.112.28.7
Apr22° / 20.311.58.9
May20° / 50.510.98.6
Jun19° / 40.310.78.3
Jul19° / 30.610.88.2
Aug20° / 30.411.28.7
Sep21° / 10.211.99.0
Oct22° / 0012.59.2
Nov23° / 0013.19.3
Dec23° / 10.313.48.9

Chance of rain

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

Calama gets about 43 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 3.1 months, from around Dec 25 to Mar 29, peaking in February at about 12% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Sep 29.

February is the wettest month by volume, with 11 mm over about 3 wet days; October is the driest, with 0 mm.

0%10%20%JanFebMarAprMayJunJulAugSepOctNovDecwetterdriermostly drysome rainFeb 6 · 12%Sep 29 · 0%
Rain on a day (%)Rain days
Jan82
Feb93
Mar31
Apr10
May21
Jun10
Jul21
Aug10
Sep10
Oct00
Nov00
Dec10

Monthly rainfall

Over a full year, Calama collects about 43 mm of rain across 9 wet days — roughly 4 mm in an average month.

It doesn’t fall evenly. February is the wettest month with 11 mm, while October is the driest at just 0 mm. The three wettest months alone bring about 58% of the year’s total.

025JanFebMarAprMayJunJulAugSepOctNovDec9116254331001
Rainfall (mm)Rain days
Jan92
Feb113
Mar61
Apr20
May51
Jun40
Jul31
Aug30
Sep10
Oct00
Nov00
Dec10

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Calama, 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 20 and lasts for 8.3 months, ending around November 27. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 94% of the time on average.

The cloudier part of the year begins around November 28 and lasts for 3.7 months, ending around March 19. The cloudiest month is January, when it is overcast or mostly cloudy 38% 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%JanFebMarAprMayJunJulAugSepOctNovDecSep 6 · 95%Jan 14 · 60%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan6238
Feb6733
Mar8119
Apr8713
May8911
Jun8515
Jul8911
Aug928
Sep946
Oct9010
Nov8515
Dec7525

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 24 min of light; the shortest, around June 12, only 10 h 36 min — a swing of roughly 2 h 48 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan13.27:088:22
Feb12.87:278:13
Mar12.27:417:50
Apr11.57:517:20
May10.98:047:00
Jun10.78:176:55
Jul10.88:197:04
Aug11.28:037:16
Sep11.97:347:26
Oct12.57:057:37
Nov13.16:487:54
Dec13.46:518:13

Sunny days

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

Calama averages about 23 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 14 and 28 days.

The sunnier stretch runs 8.3 months, from around Mar 21 to Nov 29. The sunniest month is September, with roughly 27 sunny days (brilliant).

The greyest month is January, down near 15 sunny days — about 46% fewer than the September peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantSep 1028 daysJan 1214 days
Sunny daysSky
Jan15Mixed
Feb15Bright
Mar22Bright
Apr24Brilliant
May25Brilliant
Jun23Brilliant
Jul25Brilliant
Aug27Brilliant
Sep27Brilliant
Oct26Brilliant
Nov24Brilliant
Dec20Bright

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 Calama, 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 Calama is steady company: average speeds sit near 12 km/hcalm — in every month of the year, with no meaningful windy or calm season.

05101520JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeOct 2 · 13 km/hMar 17 · 11 km/h
Wind speed (km/h)Feels
Jan12calm
Feb11calm
Mar11calm
Apr11calm
May12calm
Jun12calm
Jul12calm
Aug12light breeze
Sep13light breeze
Oct13light breeze
Nov13light breeze
Dec12light breeze

Best time to visit Calama

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid January, Calama 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, Calama suits general outdoor tourist activities for most of the year, with a peak score in the first week of November.

0246810JanFebMarAprMayJunJulAugSepOctNovDectravel scoretemperaturecloudsprecipitationNov 3 · 9.3

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
Jan8.2ideal
Feb8.2ideal
Mar8.7ideal
Apr8.9ideal
May8.6ideal
Jun8.2ideal
Jul8.2ideal
Aug8.7ideal
Sep9.0ideal
Oct9.2ideal
Nov9.2ideal
Dec8.9ideal

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

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationNov 26 · 6.9

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 Calama, 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.

Calama packs about the same all year — highs hold near 23°C. Across the year the things worth having are light clothes, sun protection and a warm layer.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In December, Calama sees daytime highs around 23°C and nights near 9°C. Pack sun protection. Worth having: light clothes.

UV index (midday) in Calama 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 Calama peaks around January 1 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highExtremeJan 1UV 17Jul 11UV 7
UV index (midday)Level
Jan17Extreme
Feb16Extreme
Mar15Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul7High
Aug10Very high
Sep13Extreme
Oct15Extreme
Nov16Extreme
Dec17Extreme

Average hourly UV index in Calama

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
Mar8.57
Apr7.55
May6.54.5
Jun63
Jul63
Aug74.5
Sep86
Oct8.57
Nov97
Dec9.57.5
Almanac & agriculture

Growing season

Chance of a frost-free day

Calama 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
Jun960
Jul917
Aug980
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. Calama banks about 1,428 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)
Jan193
Feb171
Mar170
Apr123
May71
Jun30
Jul22
Aug61
Sep102
Oct144
Nov158
Dec183

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.

Calama receives about 7.1 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 4.8 and 9.2 kWh/m².

The brighter stretch of the year lasts 6.5 months, from around Sep 11 to Mar 27. The brightest month is December, averaging about 9.1 kWh/m² (intense).

The dimmest month is June, down near 4.9 kWh/m² — roughly 46% less than the December peak.

012345678910JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseDec 39.2 kWhJun 234.8 kWh
Solar energy (kWh/m²)Level
Jan8.3Intense
Feb7.8Intense
Mar7.4Intense
Apr6.5Intense
May5.4Bright
Jun4.9Bright
Jul5.1Bright
Aug6.1Intense
Sep7.3Intense
Oct8.5Intense
Nov9.1Intense
Dec9.1Intense

Where is Calama?

Calama sits at 22.5°S, 68.9°W, 2,275 m above sea level, in Chile. The nearest listed city is San Pedro de Atacama, 90 km away.

Pozo AlmonteAlto HospicioIquiqueUyuniVillazón

Topography around Calama

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

Within 3 km, the terrain around Calama has only modest variations in elevation — a maximum elevation change of 119 m around an average of 2,268 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,554 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,822 m.

The land around Calama is covered by artificial surfaces (56%) and bare terrain (29%) within 3 km, bare terrain (94%) within 16 km, and bare terrain (99%) within 80 km.

3 km
119 m
16 km
1,554 m
80 km
3,822 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
Nearby: San Pedro de Atacama 90 km · Tocopilla 137 km · Antofagasta 201 km · Pozo Almonte 261 km · Alto Hospicio 272 km · Iquique 280 km · Uyuni 311 km · Villazón 345 km

Chile travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / L
220 V · 50 Hz
Prices
≈ 48% of US
price level, 2025
GDP per capita
$17,995
2025
Happiness
6.3 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
6.3
per 100k, 2023
Road deaths
14.9
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 517
Religion
Catholic 57%none 26%Evangelical or Protestant 16%other Christians and traditions related to 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 Calama (-22.4567°, -68.9237°, elevation 2,275 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).