Climate averages 1991–2020
Valparaíso weather
in September.
A mild, fairly dry 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 mild month in Valparaíso: daytime highs average 15.6°C and nights cool to about 10.8°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 27 mm of rain on roughly 3 days, which makes September a fairly dry month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 52 min on an average September day.
The nearest other city in this atlas is Viña del Mar (7 km away). In September its highs average 17.3°C, 1.6°C warmer than Valparaíso, with 24 mm of rain.
Among the 40 cities listed in Chile, Valparaíso ranks joint 27th of 40 for the warmest September highs and 12th of 40 for the driest September (rainfall, lowest first). The mean September high of those 40 cities is 17.2°C; Valparaíso is 1.5°C cooler than that mean.
From September to October, average highs rise by 1.2°C to 16.8°C, and monthly rainfall falls from 27 mm to 13 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
Valparaíso climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.1°C16.2°C | 16.2°C | 0.3 | 0.1 | 14.114 h |
| February | 21.1°C16.2°C | 16.2°C | 1.2 | 0.2 | 13.313 h |
| March | 20.4°C15.4°C | 15.4°C | 2.3 | 0.6 | 12.312 h |
| April | 18.5°C13.5°C | 13.5°C | 16 | 1.9 | 11.311 h |
| May | 16.7°C11.8°C | 11.8°C | 61 | 4.4 | 10.410 h |
| June | 15.3°C10.4°C | 10.4°C | 121 | 6.9 | 10.010 h |
| July | 14.5°C9.5°C | 9.5°C | 67 | 5.6 | 10.210 h |
| August | 14.9°C9.8°C | 9.8°C | 57 | 4.7 | 10.911 h |
| September, selected | 15.6°C10.8°C | 10.8°C | 27 | 2.9 | 11.912 h |
| October | 16.8°C11.9°C | 11.9°C | 13 | 1.6 | 12.913 h |
| November | 18.4°C13.4°C | 13.4°C | 2.6 | 0.4 | 13.814 h |
| December | 19.9°C14.9°C | 14.9°C | 2.8 | 0.3 | 14.314 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
- Viña del Mar in SeptemberChile · 7 kmHigh 17.3°C · Low 9.2°C · 24 mm rain
- Quilpué in SeptemberChile · 17 kmHigh 17.4°C · Low 8.3°C · 24 mm rain
- San Antonio, Chile in SeptemberChile · 62 kmHigh 15.8°C · Low 8.6°C · 28 mm rain
- Lampa in SeptemberChile · 76 kmHigh 19.5°C · Low 8.1°C · 39 mm rain
- Colina in SeptemberChile · 91 kmHigh 18.8°C · Low 7.8°C · 77 mm rain
- Quilicura in SeptemberChile · 93 kmHigh 18.0°C · Low 6.4°C · 77 mm rain
- Peñaflor in SeptemberChile · 94 kmHigh 19.0°C · Low 6.2°C · 41 mm rain
- Maipú in SeptemberChile · 96 kmHigh 18.4°C · Low 5.9°C · 55 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 Valparaíso) is explained once on the Valparaíso year overview and on the Sources, method and limits page.