Climate averages 1991–2020
Puerto Montt weather
in September.
A cool, very wet month: the 9th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in Puerto Montt: daytime highs average 12.0°C and nights cool to about 5.5°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 185 mm of rain on roughly 17 days, which makes September a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 47 min on an average September day.
The nearest other city in this atlas is Osorno (101 km away). In September its highs average 12.9°C, 0.9°C warmer than Puerto Montt, with 129 mm of rain.
Among the 40 cities listed in Chile, Puerto Montt ranks 39th of 40 for the warmest September highs and 40th of 40 for the driest September (rainfall, lowest first). The mean September high of those 40 cities is 17.2°C; Puerto Montt is 5.2°C cooler than that mean.
From September to October, average highs rise by 1.7°C to 13.7°C, and monthly rainfall falls from 185 mm to 180 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Puerto Montt climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.6°C11.7°C | 11.7°C | 101 | 11.2 | 14.815 h |
| February | 18.8°C11.9°C | 11.9°C | 100 | 9.4 | 13.714 h |
| March | 17.3°C10.9°C | 10.9°C | 132 | 12.2 | 12.412 h |
| April | 14.6°C9.0°C | 9.0°C | 184 | 15.5 | 11.011 h |
| May | 12.5°C7.6°C | 7.6°C | 261 | 18.2 | 9.810 h |
| June | 10.2°C5.8°C | 5.8°C | 311 | 20.8 | 9.29 h |
| July | 9.6°C4.7°C | 4.7°C | 276 | 20.1 | 9.59 h |
| August | 10.4°C4.9°C | 4.9°C | 277 | 20.6 | 10.510 h |
| September, selected | 12.0°C5.5°C | 5.5°C | 185 | 17.4 | 11.812 h |
| October | 13.7°C7.0°C | 7.0°C | 180 | 17.5 | 13.213 h |
| November | 15.3°C8.6°C | 8.6°C | 151 | 15.4 | 14.414 h |
| December | 17.2°C10.3°C | 10.3°C | 137 | 13.7 | 15.115 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Osorno in SeptemberChile · 101 kmHigh 12.9°C · Low 4.5°C · 129 mm rain
- San Carlos de Bariloche in SeptemberArgentina · 141 kmHigh 7.2°C · Low 0.8°C · 68 mm rain
- Valdivia in SeptemberChile · 186 kmHigh 13.2°C · Low 6.0°C · 153 mm rain
- Padre Las Casas in SeptemberChile · 303 kmHigh 14.0°C · Low 4.4°C · 113 mm rain
- Temuco in SeptemberChile · 305 kmHigh 14.3°C · Low 4.7°C · 113 mm rain
- Los Ángeles in SeptemberChile · 448 kmHigh 15.3°C · Low 5.2°C · 94 mm rain
- Villa Mercedes, Chile in SeptemberChile · 460 kmHigh 14.5°C · Low 4.5°C · 145 mm rain
- Coronel in SeptemberChile · 493 kmHigh 15.3°C · Low 7.0°C · 84 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Puerto Montt) is explained once on the Puerto Montt year overview and on the Sources, method and limits page.