Buin in Fall

In fall (March, April and May), Buin sees average daytime highs around 22°C and overnight lows near 9°C, with 106 mm of rain over about 10 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.

Over the season highs ease from about 27°C in early March to 16°C by late May. The sky is clear or mostly clear about 62% of the time across fall, and the air most often feels dry.

Fall is Buin's 2nd-best season to visit on our travel score. For the whole year in context, see Buin's year-round climate.

Avg daytime high: 22°C; 2nd-warmest season
Avg overnight low: 9°C
Rainfall: 106 mm; 10 wet days
Avg wind: 5 km/h
Travel score: 7.9; 2nd-best season
Months: Mar · Apr · May

← Summer Buin year-round climate Winter →

Spring Summer Fall Winter

Temperature in Buin in Fall

Average highAverage lowShaded bands: 10–90% of days

Over the season highs ease from about 27°C in early March to 16°C by late May.

A typical fall day in Buin reaches about 22°C and drops to 9°C overnight. The warmest of the three months is March, the coolest May.

Buin weather by month

How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 15°	3	0.9	14	7.7
Feb	28° / 15°	4	1	13.3	8.3
Mar	26° / 13°	7	1.1	12.3	8.9
Apr	22° / 9°	29	3.1	11.2	8.2
May	18° / 6°	70	6	10.3	6.5
Jun	15° / 3°	126	7.8	9.8	4.8
Jul	15° / 3°	94	7.2	10	4.7
Aug	16° / 4°	83	7.4	10.7	5.5
Sep	18° / 6°	57	7.2	11.8	6.4
Oct	21° / 8°	38	5.2	12.8	7.4
Nov	24° / 11°	15	2.8	13.8	8.7
Dec	27° / 13°	7	1.2	14.2	8.6

Cloud cover in Fall

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 62% of the time across fall.

Chance of precipitation in Fall

Any precipitation

Buin gets around 106 mm of rain over 10 wet days across fall. The line is the day-by-day chance of measurable precipitation.

Humidity in Fall

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Fall

Winds average 5 km/h across fall.

Sunrise & sunset in Fall

DaylightNight

Daylight runs from about 12 h 48 min in early March to 9 h 54 min by late May. The lit band spans sunrise to sunset each day.

Solar energy in Fall

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across fall, about 4.7 kWh/m².

Planning a trip in fall

Hazard calendar for Buin

In seasonPeak

In fall, Buin overlaps its rainy season season. The full year is below, with each hazard's peak months called out.

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 fall a good time to visit Buin?

Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

7.9

Sightseeing

2nd-best month of the year

5.5

Beach & pool

2nd-best month of the year

fall is one of the better times to visit Buin for general sightseeing.

What to pack for Buin in Fall

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

In fall, Buin sees daytime highs around 22°C and nights near 9°C. Pack sun protection. Worth having: light clothes and a warm layer. About 10 days see rain.

sun protectionlight clothesa warm layer

UV index in Buin in Fall

LowModerateHighVery highExtreme

Clear-sky midday UV across fall averages around 6 — enough to warrant sun protection. 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	12	10	5	3	3	3	3	6	9	10	12
Level	Extreme	Extreme	Very high	Moderate	Moderate	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	12	Extreme
Mar	10	Very high
Apr	5	Moderate
May	3	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	3	Moderate
Sep	6	High
Oct	9	Very high
Nov	10	Extreme
Dec	12	Extreme

Air quality in Buin in Fall

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	30	31	41	56	80	96	108	95	78	55	35	28
Level	Moderate	Moderate	Poor	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Poor	Poor	Moderate

	PM2.5 (µg/m³)	Level
Jan	30	Moderate
Feb	31	Moderate
Mar	41	Poor
Apr	56	Unhealthy
May	80	Unhealthy
Jun	96	Unhealthy
Jul	108	Unhealthy
Aug	95	Unhealthy
Sep	78	Unhealthy
Oct	55	Poor
Nov	35	Poor
Dec	28	Moderate

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

cropland 31%

16 km

1,416 m

cropland 33%

80 km

6,085 m

shrubs 25%

treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and ice

← Summer Buin year-round climate Winter →

Fall 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

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.