Monthly climate guide
Valparaíso weather in September
September in Valparaíso is typically cool, with average daytime highs around 14°C (57°F) and night-time lows near 11°C (51°F). The month usually brings about 14 mm of rain (very dry) and is a mix of sun and cloud. Daytime highs are about the same as August and about the same as October.
What stands out in September
- Days and nights are close, only about 3°C apart.
- Valparaíso is usually about 6°C cooler than Santiago, 100 km away, in September.
- In Valparaíso, September is early spring — the seasons are reversed south of the equator.
- September is among Valparaíso's three coolest months.
Avg high
14°C
57°F
Avg low
11°C
51°F
Rainfall
14 mm
very dry
Humidity
84%
relative
Sky
54%
cloud · a mix of sun and cloud
Valparaíso weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 19°C / 66°F | 16°C / 60°F | 1 mm | 83% | 43% |
| February | 19°C / 67°F | 16°C / 60°F | 1 mm | 83% | 41% |
| March | 19°C / 65°F | 15°C / 59°F | 3 mm | 83% | 43% |
| April | 17°C / 62°F | 14°C / 56°F | 9 mm | 84% | 48% |
| May | 16°C / 60°F | 13°C / 55°F | 44 mm | 85% | 60% |
| June | 14°C / 58°F | 11°C / 52°F | 58 mm | 84% | 56% |
| July | 13°C / 56°F | 10°C / 51°F | 34 mm | 84% | 55% |
| August | 14°C / 56°F | 10°C / 51°F | 38 mm | 84% | 54% |
| September | 14°C / 57°F | 11°C / 51°F | 14 mm | 84% | 54% |
| October | 15°C / 59°F | 11°C / 52°F | 13 mm | 83% | 52% |
| November | 16°C / 62°F | 13°C / 55°F | 4 mm | 82% | 41% |
| December | 18°C / 64°F | 14°C / 57°F | 4 mm | 82% | 41% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
Is September a good time to visit Valparaíso?
Compare the months in the chart above to find your ideal window.
Best time to visit Valparaíso →Other Chile cities in September
Cite or embed this data
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Valparaíso weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/chile/valparaiso/september
<a href="https://weathercompare.eu/weather/chile/valparaiso/september">Valparaíso weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/chile/valparaiso" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Valparaíso weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/chile/valparaiso/september">Valparaíso weather in September</a> – WeatherCompare</p>
Valparaíso in September: quick answers
Is September a good time to visit Valparaíso?
September is a reasonable time for Valparaíso: highs around 14°C and about 14 mm of rain, though not one of the three best months.
How warm is Valparaíso in September?
Average highs are about 14°C (57°F) and average lows about 11°C (51°F), based on 10 years of daily data.
Does it rain a lot in Valparaíso in September?
Valparaíso typically gets around 14 mm of rain in September — very dry.
Figures are long-term averages for the area around Valparaíso (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.