Puerto Montt weather in September

In September, Puerto Montt sees average daytime highs of 12°C and overnight lows near 6°C, with 185 mm of precipitation across 17.4 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 12°C through the month. The sky is clear or mostly clear about 14% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of September to 12 h 24 min by month's end. Set against the rest of the year, September is Puerto Montt's 8th-clearest and 10th-windiest month. For the whole year in context, see Puerto Montt's year-round climate.

Daytime high: 12°; 9th warmest
Overnight low: 6°; 4th coldest
Precipitation: 185 mm; 17.4 wet days
Daylight: 11 h 42 min; 7:54 AM – 7:38 PM
Cloud cover: 72%; 8th clearest
Wind: 13 km/h; 10th windiest
Solar energy: 3.49 kWh/m²
Travel score: 2.5; 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.

← August Puerto Montt year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 12°C through the month.

A typical September day in Puerto Montt reaches about 12°C in the afternoon and slips back to 6°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 15°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13
Avg low (°C)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	7	7	7	7	7

	Avg high (°C)	Avg low (°C)
1	11	6
2	11	6
3	11	6
4	11	6
5	11	6
6	11	6
7	12	6
8	12	6
9	12	6
10	12	6
11	12	6
12	12	6
13	12	6
14	12	6
15	12	6
16	12	6
17	12	6
18	12	6
19	12	6
20	12	6
21	12	6
22	12	6
23	13	6
24	13	6
25	13	6
26	13	7
27	13	7
28	13	7
29	13	7
30	13	7

Puerto Montt weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	18° / 11°	101	11.1	0	14.7	5.8
Feb	18° / 11°	98	9.4	0	13.7	6.0
Mar	17° / 10°	132	12.2	0	12.3	5.1
Apr	14° / 9°	183	15.2	0	10.9	3.7
May	12° / 8°	261	18.3	0	9.7	2.6
Jun	10° / 6°	311	20.7	0.2	9.1	1.7
Jul	10° / 5°	276	20.2	0.5	9.3	1.6
Aug	11° / 5°	277	20.8	0.2	10.3	1.9
Sep	12° / 6°	185	17.4	0.1	11.7	2.5
Oct	14° / 7°	180	17.5	0	13.1	3.1
Nov	15° / 9°	151	15.4	0	14.3	3.9
Dec	17° / 10°	137	13.6	0	14.9	4.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 73%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	26	26	26	28	28	28	29	28	28	28	27	28	28	28	28	28	28	28	28	28	27	27	27	27	26	26	26	27	27	27
Cloudier (%)	74	74	74	72	72	72	71	72	72	72	73	72	72	72	72	72	72	72	72	72	73	73	73	73	74	74	74	73	73	73

	Clearer (%)	Cloudier (%)
1	26	74
2	26	74
3	26	74
4	28	72
5	28	72
6	28	72
7	29	71
8	28	72
9	28	72
10	28	72
11	27	73
12	28	72
13	28	72
14	28	72
15	28	72
16	28	72
17	28	72
18	28	72
19	28	72
20	28	72
21	27	73
22	27	73
23	27	73
24	27	73
25	26	74
26	26	74
27	26	74
28	27	73
29	27	73
30	27	73

Chance of precipitation in September

Any precipitation

Puerto Montt gets around 185 mm of rain and snow over 17.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 59% and peaks near 64% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	64	64	64	63	63	62	61	61	60	60	60	60	59	59	59	58	57	57	56	56	56	56	57	57	57	57	57	57	57	56

	Rain chance (%)
1	64
2	64
3	64
4	63
5	63
6	62
7	61
8	61
9	60
10	60
11	60
12	60
13	59
14	59
15	59
16	58
17	57
18	57
19	56
20	56
21	56
22	56
23	57
24	57
25	57
26	57
27	57
28	57
29	57
30	56

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	14	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	12	12	12	12	12	12	12	12	12	12	12	12	12
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	14	light breeze
2	13	light breeze
3	13	light breeze
4	13	light breeze
5	13	light breeze
6	13	light breeze
7	13	light breeze
8	13	light breeze
9	13	light breeze
10	13	light breeze
11	13	light breeze
12	13	light breeze
13	13	light breeze
14	13	light breeze
15	13	light breeze
16	13	light breeze
17	13	light breeze
18	12	light breeze
19	12	light breeze
20	12	light breeze
21	12	light breeze
22	12	light breeze
23	12	light breeze
24	12	light breeze
25	12	light breeze
26	12	light breeze
27	12	light breeze
28	12	light breeze
29	12	light breeze
30	12	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 hours at the start of September to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over September. Sunrise moves from 8:21 AM to 7:29 AM, and sunset from 7:22 PM to 7:53 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.0	11.1	11.1	11.2	11.2	11.3	11.3	11.3	11.4	11.4	11.5	11.5	11.6	11.6	11.7	11.7	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.2	12.2	12.2	12.3	12.3	12.4
Sunrise (AM)	8:21	8:19	8:17	8:16	8:14	8:12	8:10	8:09	8:07	8:05	8:03	8:01	8:00	7:58	7:56	7:54	7:52	7:51	7:49	7:47	7:45	7:44	7:42	7:40	7:38	7:36	7:35	7:33	7:31	7:29
Sunset (PM)	7:22	7:23	7:24	7:25	7:26	7:27	7:28	7:30	7:31	7:32	7:33	7:34	7:35	7:36	7:37	7:38	7:39	7:40	7:41	7:42	7:43	7:44	7:45	7:46	7:47	7:49	7:50	7:51	7:52	7:53

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.0	8:21	7:22
2	11.1	8:19	7:23
3	11.1	8:17	7:24
4	11.2	8:16	7:25
5	11.2	8:14	7:26
6	11.3	8:12	7:27
7	11.3	8:10	7:28
8	11.3	8:09	7:30
9	11.4	8:07	7:31
10	11.4	8:05	7:32
11	11.5	8:03	7:33
12	11.5	8:01	7:34
13	11.6	8:00	7:35
14	11.6	7:58	7:36
15	11.7	7:56	7:37
16	11.7	7:54	7:38
17	11.8	7:52	7:39
18	11.8	7:51	7:40
19	11.9	7:49	7:41
20	11.9	7:47	7:42
21	12.0	7:45	7:43
22	12.0	7:44	7:44
23	12.1	7:42	7:45
24	12.1	7:40	7:46
25	12.2	7:38	7:47
26	12.2	7:36	7:49
27	12.2	7:35	7:50
28	12.3	7:33	7:51
29	12.3	7:31	7:52
30	12.4	7:29	7:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.49 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 — September's 3.49 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	2.8	2.9	2.9	3.0	3.0	3.1	3.1	3.1	3.2	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.5	3.6	3.6	3.7	3.7	3.8	3.8	3.9	3.9	3.9	4.0	4.0	4.0	4.1
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	2.8	Moderate
2	2.9	Moderate
3	2.9	Moderate
4	3.0	Moderate
5	3.0	Moderate
6	3.1	Moderate
7	3.1	Moderate
8	3.1	Moderate
9	3.2	Moderate
10	3.2	Moderate
11	3.3	Moderate
12	3.3	Moderate
13	3.4	Moderate
14	3.4	Moderate
15	3.5	Moderate
16	3.5	Moderate
17	3.5	Moderate
18	3.6	Moderate
19	3.6	Moderate
20	3.7	Moderate
21	3.7	Moderate
22	3.8	Moderate
23	3.8	Moderate
24	3.9	Moderate
25	3.9	Moderate
26	3.9	Moderate
27	4.0	Moderate
28	4.0	Bright
29	4.0	Bright
30	4.1	Bright

Planning a trip in September

Is September a good time to visit Puerto Montt?

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

2.5

Sightseeing

9th-best month of the year

0.0

Beach & pool

8th-best month of the year

September is a weaker month for outdoor sightseeing in Puerto Montt.

What to pack for Puerto Montt in September

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

In September, Puerto Montt sees daytime highs around 12°C and nights near 6°C. Pack rain gear. Worth having: a warm layer. About 17 days see rain.

rain geara warm layer

Sea temperature near Puerto Montt in September

The nearest coast averages about 11°C in September — 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	16	16	15	13	11	11	11	10	11	12	13	15
Comfort	Cool	Cool	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	16	Cool
Feb	16	Cool
Mar	15	Bracing
Apr	13	Bracing
May	11	Bracing
Jun	11	Bracing
Jul	11	Bracing
Aug	10	Bracing
Sep	11	Bracing
Oct	12	Bracing
Nov	13	Bracing
Dec	15	Bracing

UV index in Puerto Montt in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	12	11	7	4	2	1	2	2	4	7	8	12
Level	Extreme	Extreme	High	Moderate	Moderate	Low	Low	Moderate	Moderate	High	Very high	Extreme

	UV index (midday)	Level
Jan	12	Extreme
Feb	11	Extreme
Mar	7	High
Apr	4	Moderate
May	2	Moderate
Jun	1	Low
Jul	2	Low
Aug	2	Moderate
Sep	4	Moderate
Oct	7	High
Nov	8	Very high
Dec	12	Extreme

Air quality in Puerto Montt in September

GoodModeratePoorUnhealthyVery unhealthy

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	23	23	34	31	26	23	25	30	32	29	28	29
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	23	Moderate
Feb	23	Moderate
Mar	34	Moderate
Apr	31	Moderate
May	26	Moderate
Jun	23	Moderate
Jul	25	Moderate
Aug	30	Moderate
Sep	32	Moderate
Oct	29	Moderate
Nov	28	Moderate
Dec	29	Moderate

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

artificial surfaces 47%

16 km

426 m

trees 42%

80 km

2,668 m

trees 47%

treesgrasslandcroplandartificial surfacesbare terrainsnow and icewater

← August Puerto Montt year-round climate October →Best places to visit in September

September 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

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).

	Avg high (°C)	Avg low (°C)
1	11	6
2	11	6
3	11	6
4	11	6
5	11	6
6	11	6
7	12	6
8	12	6
9	12	6
10	12	6
11	12	6
12	12	6
13	12	6
14	12	6
15	12	6
16	12	6
17	12	6
18	12	6
19	12	6
20	12	6
21	12	6
22	12	6
23	13	6
24	13	6
25	13	6
26	13	7
27	13	7
28	13	7
29	13	7
30	13	7

	Clearer (%)	Cloudier (%)
1	26	74
2	26	74
3	26	74
4	28	72
5	28	72
6	28	72
7	29	71
8	28	72
9	28	72
10	28	72
11	27	73
12	28	72
13	28	72
14	28	72
15	28	72
16	28	72
17	28	72
18	28	72
19	28	72
20	28	72
21	27	73
22	27	73
23	27	73
24	27	73
25	26	74
26	26	74
27	26	74
28	27	73
29	27	73
30	27	73

	Rain chance (%)
1	64
2	64
3	64
4	63
5	63
6	62
7	61
8	61
9	60
10	60
11	60
12	60
13	59
14	59
15	59
16	58
17	57
18	57
19	56
20	56
21	56
22	56
23	57
24	57
25	57
26	57
27	57
28	57
29	57
30	56

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	11	6
2	11	6
3	11	6
4	11	6
5	11	6
6	11	6
7	12	6
8	12	6
9	12	6
10	12	6
11	12	6
12	12	6
13	12	6
14	12	6
15	12	6
16	12	6
17	12	6
18	12	6
19	12	6
20	12	6
21	12	6
22	12	6
23	13	6
24	13	6
25	13	6
26	13	7
27	13	7
28	13	7
29	13	7
30	13	7

	Clearer (%)	Cloudier (%)
1	26	74
2	26	74
3	26	74
4	28	72
5	28	72
6	28	72
7	29	71
8	28	72
9	28	72
10	28	72
11	27	73
12	28	72
13	28	72
14	28	72
15	28	72
16	28	72
17	28	72
18	28	72
19	28	72
20	28	72
21	27	73
22	27	73
23	27	73
24	27	73
25	26	74
26	26	74
27	26	74
28	27	73
29	27	73
30	27	73

	Rain chance (%)
1	64
2	64
3	64
4	63
5	63
6	62
7	61
8	61
9	60
10	60
11	60
12	60
13	59
14	59
15	59
16	58
17	57
18	57
19	56
20	56
21	56
22	56
23	57
24	57
25	57
26	57
27	57
28	57
29	57
30	56

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	11	6
2	11	6
3	11	6
4	11	6
5	11	6
6	11	6
7	12	6
8	12	6
9	12	6
10	12	6
11	12	6
12	12	6
13	12	6
14	12	6
15	12	6
16	12	6
17	12	6
18	12	6
19	12	6
20	12	6
21	12	6
22	12	6
23	13	6
24	13	6
25	13	6
26	13	7
27	13	7
28	13	7
29	13	7
30	13	7

	Clearer (%)	Cloudier (%)
1	26	74
2	26	74
3	26	74
4	28	72
5	28	72
6	28	72
7	29	71
8	28	72
9	28	72
10	28	72
11	27	73
12	28	72
13	28	72
14	28	72
15	28	72
16	28	72
17	28	72
18	28	72
19	28	72
20	28	72
21	27	73
22	27	73
23	27	73
24	27	73
25	26	74
26	26	74
27	26	74
28	27	73
29	27	73
30	27	73

	Rain chance (%)
1	64
2	64
3	64
4	63
5	63
6	62
7	61
8	61
9	60
10	60
11	60
12	60
13	59
14	59
15	59
16	58
17	57
18	57
19	56
20	56
21	56
22	56
23	57
24	57
25	57
26	57
27	57
28	57
29	57
30	56

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100