Buin weather in January

In January, Buin sees average daytime highs of 29°C and overnight lows near 15°C, with 3 mm of rain across 0.9 wet days and about 14 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 88% of the time in January, and the air most often feels dry.

Daylight stretches from about 14 h 12 min at the start of January to 13 h 42 min by month's end. Set against the rest of the year, January is Buin's 1st-clearest and 1st-windiest month. For the whole year in context, see Buin's year-round climate.

Daytime high
29°
1st warmest
Overnight low
15°
12th coldest
Rainfall
3 mm
0.9 wet days
Daylight
14 hours
6:52 AM – 8:53 PM
Cloud cover
13%
1st clearest
Wind
6 km/h
1st windiest
Solar energy
8.79 kWh/m²
Travel score
7.7
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical January day in Buin reaches about 29°C in the afternoon and slips back to 15°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, January runs about 2°C warmer than December and on par with February.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12815
22815
32815
42815
52815
62815
72815
82915
92915
102915
112915
122916
132916
142916
152916
162916
172916
182916
192916
202916
212916
222916
232916
242916
252916
262916
272916
282916
292915
302915
312915

Buin weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 15°30.9147.7
Feb28° / 15°4113.38.3
Mar26° / 13°71.112.38.9
Apr22° / 293.111.28.2
May18° / 70610.36.5
Jun15° / 1267.89.84.8
Jul15° / 947.2104.7
Aug16° / 837.410.75.5
Sep18° / 577.211.86.4
Oct21° / 385.212.87.4
Nov24° / 11°152.813.88.7
Dec27° / 13°71.214.28.6

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 88% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 5% of January, with mostly cloudy or overcast conditions the remaining 7%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1937
2937
3937
4937
5937
6937
7937
8937
9937
10937
11937
12937
13937
14937
15937
16937
17937
18937
19937
20937
21937
22946
23946
24946
25946
26946
27955
28955
29955
30955
31955

Chance of precipitation in January

Any precipitation

Buin gets around 3 mm of rain over 0.9 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 3% and peaks near 3% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
13
23
33
43
53
63
73
83
93
103
113
123
133
143
153
163
173
183
193
203
213
223
233
243
253
263
273
283
293
303
313

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 78% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
183161
283161
383161
483161
583161
682171
782171
882171
981181
1081181
1180191
1279201
1379201
1478211
1577221
1676231
1775241
1874251
1974251
2073261
2173261
2272262
2372262
2473252
2573252
2673252
2774242
2875232
2975232
3076222
3176222

Wind in January

Winds average 6 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 14 h 12 min at the start of January to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over January. Sunrise moves from 6:40 AM to 7:06 AM, and sunset from 8:52 PM to 8:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.26:408:52
214.26:418:53
314.26:418:53
414.26:428:53
514.26:438:53
614.26:448:53
714.16:448:53
814.16:458:53
914.16:468:53
1014.16:478:53
1114.16:488:53
1214.16:488:53
1314.16:498:53
1414.06:508:53
1514.06:518:53
1614.06:528:53
1714.06:538:52
1814.06:548:52
1914.06:558:52
2013.96:568:52
2113.96:568:51
2213.96:578:51
2313.96:588:51
2413.96:598:50
2513.87:008:50
2613.87:018:49
2713.87:028:49
2813.87:038:48
2913.77:048:48
3013.77:058:47
3113.77:068:47

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 8.79 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 8.83 kWh/m² in December across the year — January's 8.79 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
19.0Intense
29.0Intense
39.0Intense
49.0Intense
59.0Intense
68.9Intense
78.9Intense
88.9Intense
98.9Intense
108.9Intense
118.9Intense
128.9Intense
138.8Intense
148.8Intense
158.8Intense
168.8Intense
178.8Intense
188.8Intense
198.7Intense
208.7Intense
218.7Intense
228.7Intense
238.7Intense
248.6Intense
258.6Intense
268.6Intense
278.6Intense
288.5Intense
298.5Intense
308.5Intense
318.5Intense
Planning a trip in January

Hazard calendar for Buin

In seasonPeak

None of Buin's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Buin's rainy season runs May–September, when most of the year's rain falls.

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

Is January a good time to visit Buin?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.7
Sightseeing
6th-best month of the year
9.2
Beach & pool
1st-best month of the year

January is one of the better times to visit Buin for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Buin in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Buin sees daytime highs around 29°C and nights near 15°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Buin in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Buin peaks around January 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateVery highExtremeJan 17UV 13Jun 15UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr5Moderate
May3Moderate
Jun3Moderate
Jul3Moderate
Aug3Moderate
Sep6High
Oct9Very high
Nov10Extreme
Dec12Extreme

Air quality in Buin in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Buin is worst in July — around 108 µg/m³ PM2.5 (unhealthy), about 3.9× the cleanest month (December, 28 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJul 16107 µg/m³Dec 2128 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb31Moderate
Mar41Poor
Apr56Unhealthy
May80Unhealthy
Jun96Unhealthy
Jul108Unhealthy
Aug95Unhealthy
Sep78Unhealthy
Oct55Poor
Nov35Poor
Dec28Moderate
Location & terrain

Where is Buin?

Buin sits at 33.7°S, 70.7°W, 483 m above sea level, in Chile. The nearest listed city is Paine, 8.0 km away.

Topography around Buin

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

Within 3 km, the terrain around Buin has only modest variations in elevation — a maximum elevation change of 74 m around an average of 473 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,416 m; within 80 km, extreme variations in elevation — a maximum elevation change of 6,085 m.

The land around Buin is covered by cropland (31%) and artificial surfaces (30%) within 3 km, cropland (33%) within 16 km, and shrubs (25%), grassland (23%) and bare terrain (21%) within 80 km.

3 km
74 m
16 km
1,416 m
80 km
6,085 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and ice
January weather nearby: Paine 8.0 km · San Bernardo 16 km · Talagante 19 km · Peñaflor 19 km · Padre Hurtado 19 km · La Pintana 19 km · Puente Alto 20 km · El Monte 23 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 Buin (-33.7326°, -70.7428°, elevation 483 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).