Puerto Montt weather in December

In December, Puerto Montt sees average daytime highs of 17°C and overnight lows near 10°C, with 137 mm of rain across 13.6 wet days and about 14.9 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 17°C through the month. The sky is clear or mostly clear about 18% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 48 min at the start of December to 15 hours by month's end. Set against the rest of the year, December is Puerto Montt's 4th-clearest and 5th-windiest month. For the whole year in context, see Puerto Montt's year-round climate.

Daytime high
17°
3rd warmest
Overnight low
10°
9th coldest
Rainfall
137 mm
13.6 wet days
Daylight
15 hours
6:18 AM – 9:17 PM
Cloud cover
66%
4th clearest
Wind
13 km/h
5th windiest
Solar energy
6.67 kWh/m²
Travel score
4.9
out of 10

Puerto Montt is city and capital of Los Lagos Region, Chile.

Air quality
High
PM2.5 27.9 µg/m³ · 2019
Density
4,826/km²
people per km²
Founded
1853

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 17°C through the month.

A typical December day in Puerto Montt reaches about 17°C in the afternoon and slips back to 10°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 20°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1169
21610
31610
41610
51610
61610
71610
81610
91610
101710
111710
121710
131710
141710
151710
161710
171710
181710
191710
201710
211710
221711
231711
241711
251711
261711
271711
281711
291811
301811
311811

Puerto Montt weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan18° / 11°10111.1014.75.8
Feb18° / 11°989.4013.76.0
Mar17° / 10°13212.2012.35.1
Apr14° / 18315.2010.93.7
May12° / 26118.309.72.6
Jun10° / 31120.70.29.11.7
Jul10° / 27620.20.59.31.6
Aug11° / 27720.80.210.31.9
Sep12° / 18517.40.111.72.5
Oct14° / 18017.5013.13.1
Nov15° / 15115.4014.33.9
Dec17° / 10°13713.6014.94.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23466
33466
43466
53565
63565
73565
83565
93565
103565
113565
123466
133466
143466
153466
163367
173466
183466
193466
203466
213466
223565
233565
243565
253664
263763
273763
283862
293862
303961
313961

Chance of precipitation in December

Any precipitation

Puerto Montt gets around 137 mm of rain over 13.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 46% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
146
245
345
444
544
644
744
844
944
1044
1144
1244
1344
1444
1544
1644
1745
1845
1945
2045
2145
2245
2345
2444
2544
2644
2743
2843
2943
3043
3142

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1973
2973
3973
4973
5964
6964
7964
8964
9964
10964
11964
12964
13964
14955
15955
16955
17955
18946
19946
20937
21937
22928
23928
24919
25919
269010
279010
289010
298911
308911
318911

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 48 min at the start of December to 15 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over December. Sunrise moves from 6:18 AM to 6:26 AM, and sunset from 9:05 PM to 9:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.86:189:05
214.86:189:06
314.86:189:07
414.86:189:08
514.96:179:09
614.96:179:10
714.96:179:11
814.96:179:11
914.96:179:12
1014.96:179:13
1114.96:179:14
1215.06:189:15
1315.06:189:15
1415.06:189:16
1515.06:189:17
1615.06:189:17
1715.06:199:18
1815.06:199:19
1915.06:199:19
2015.06:209:20
2115.06:209:20
2215.06:219:21
2315.06:219:21
2415.06:229:22
2515.06:229:22
2615.06:239:22
2715.06:239:23
2815.06:249:23
2915.06:259:23
3015.06:259:24
3115.06:269:24

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.67 kWh/m².

For context, solar energy here swings from a low near 1.26 kWh/m² to a high of 6.83 kWh/m² in January across the year — December's 6.67 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.6Intense
86.6Intense
96.6Intense
106.6Intense
116.6Intense
126.6Intense
136.6Intense
146.6Intense
156.6Intense
166.6Intense
176.6Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.8Intense
316.8Intense
Planning a trip in December

Is December a good time to visit Puerto Montt?

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

4.9
Sightseeing
4th-best month of the year
1.0
Beach & pool
4th-best month of the year

December is a reasonable time to visit Puerto Montt for sightseeing.

What to pack for Puerto Montt in December

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

In December, Puerto Montt sees daytime highs around 17°C and nights near 10°C. Pack sun protection. Worth having: a warm layer and rain gear. About 14 days see rain.

sun protectiona warm layerrain gear

Sea temperature near Puerto Montt in December

The nearest coast averages about 15°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 18 km away) is warmest in January at about 16°C and coldest in August near 10°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

8°10°12°14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar15Bracing
Apr13Bracing
May11Bracing
Jun11Bracing
Jul11Bracing
Aug10Bracing
Sep11Bracing
Oct12Bracing
Nov13Bracing
Dec15Bracing

UV index in Puerto Montt in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Puerto Montt peaks around December 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateLowModerateVery highExtremeDec 23UV 12Jun 18UV 1
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar7High
Apr4Moderate
May2Moderate
Jun1Low
Jul2Low
Aug2Moderate
Sep4Moderate
Oct7High
Nov8Very high
Dec12Extreme

Air quality in Puerto Montt in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Puerto Montt is worst in March — around 34 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Puerto Montt's WHO annual average of 27.9 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2133 µg/m³Jan 2323 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb23Moderate
Mar34Moderate
Apr31Moderate
May26Moderate
Jun23Moderate
Jul25Moderate
Aug30Moderate
Sep32Moderate
Oct29Moderate
Nov28Moderate
Dec29Moderate
Location & terrain

Where is Puerto Montt?

Puerto Montt sits at 41.5°S, 72.9°W, 11 m above sea level, in Chile. The nearest listed city is Puerto Varas, 17 km away.

Topography around Puerto Montt

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

Within 3 km, the terrain around Puerto Montt has only modest variations in elevation — a maximum elevation change of 147 m around an average of 66 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 426 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,668 m.

The land around Puerto Montt is covered by artificial surfaces (47%), water (25%) and trees (20%) within 3 km, trees (42%), water (30%) and grassland (23%) within 16 km, and trees (47%) and water (29%) within 80 km.

3 km
147 m
16 km
426 m
80 km
2,668 m
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewater
December weather nearby: Puerto Varas 17 km · Llanquihue 24 km · Calbuco 37 km · Frutillar 40 km · Maullín 57 km · Purranque 64 km · Ancud 85 km · Osorno 101 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 Puerto Montt (-41.4693°, -72.9424°, elevation 11 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).