Puerto Montt weather in August
In August, Puerto Montt has daytime highs averaging 10 °C, nights around 5.2 °C, with 21 wet days, and a sea temperature of 10 °C. Figures are 1991–2020 climate normals.
- 10.5°C Average high
- 5.2°C Average low
- 21days Wet days
- 273mm Rainfall
- 10.3°C Sea temperature
- 10h Daylight
Daily temperatures through August
How August develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 August | 10.0 °C | 4.9 °C | 68 % |
| 11–20 August | 10.4 °C | 5.0 °C | 68 % |
| 21–31 August | 11.0 °C | 5.6 °C | 64 % |
What to expect
| Measure | Typical August | Share of the month |
|---|---|---|
| Days above 25 °C | 0 of 31 | 0 % |
| Days above 30 °C | 0 of 31 | 0 % |
| Days below 0 °C | 0.5 of 31 | 2 % |
| Days with more than 1 mm rain | 21 of 31 | 67 % |
Conditions in August
| Measure | Average |
|---|---|
| Mean temperature | 7.6 °C |
| Record high (1991–2020) | 17 °C |
| Record low (1991–2020) | -2.7 °C |
| Relative humidity | 88 % |
| Wind speed | 22 km/h |
| Cloud cover | 76 % |
Where Puerto Montt ranks in August
| Ranking | Position | Value |
|---|---|---|
| The coolest places in South America in August | 2nd of 50 | 10 °C |
| The coolest places in the world in August | 5th of 50 | 10 °C |
August compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| June | 10.3 °C | 302 mm | 78 % |
| July | 9.6 °C | 271 mm | 75 % |
| August | 10.5 °C | 273 mm | 76 % |
| September | 11.9 °C | 181 mm | 70 % |
| October | 13.6 °C | 177 mm | 70 % |
See all twelve months for Puerto Montt
- August is the 10th warmest month here.
- It is the 11th driest month of the year.
- It ranks 10th for least cloud cover.
- Days last about 10 hours from sunrise to sunset.
- It rains on 21 of 31 days — 67 % of the month.
- Nights are about 5.3 °C cooler than the middle of the day.
- The hottest August day on record since 1991 reached 17 °C, 6.1 °C above the usual daytime high.
- Beach score: 0 / 100 — see how this is calculated.
QuestionsAugust in Puerto Montt, answered
How warm is Puerto Montt in August?
Daily highs average 10 °C and nights fall to about 5.2 °C, a spread of 5.3 °C between afternoon and dawn. That makes August the 11th warmest month of the year here.
Does it rain much in Puerto Montt in August?
August averages 273 mm of rain, spread over about 21 of the 31 days — 67 % of the month. Cloud cover averages 76 % of the sky.
Is the sea warm enough to swim in August?
The sea averages 10 °C off Puerto Montt in August. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in August?
Puerto Montt averages 10 hours between sunrise and sunset in August. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.