Valparaíso in September
In September, Valparaíso averages 16°C (60°F) during the day and 10°C (51°F) at night, with only about 3 rainy days.
High seasonConditions are cool — bring a jacket for evenings. Skies are generally dry and clear.
September in Valparaíso is outside the typical sweet spot for sightseeing weather. It can still be a great time to visit if you have specific reasons (festivals, off-season pricing, etc.).
How September compares to the rest of the year in Valparaíso
September is in the middle of the year for warmth in Valparaíso (9th of 12) and moderately rainy compared to the rest of the year (5th of 12). Daytime temperature runs 2°C below the annual average (18°C). September runs 1°C warmer than August (15°C) and warms a further 1°C into October (17°C).
September sunrise & sunset in Valparaíso
Times shown for Valparaíso local time (America/Santiago), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Valparaíso — September
Golden-hour and blue-hour windows for the 15th of September, in Valparaíso's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Valparaíso in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Valparaíso's popularity.
Crowds & pricing — September in Valparaíso
This is a busy month in Valparaíso — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Valparaíso
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Valparaíso in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 21°C / 69°F | 15°C / 59°F | 3 mm | 1 | — |
| February | 21°C / 69°F | 15°C / 60°F | 1 mm | 0 | — |
| March | 20°C / 68°F | 15°C / 58°F | 3 mm | 1 | — |
| April | 18°C / 65°F | 13°C / 56°F | 23 mm | 2 | — |
| May | 17°C / 62°F | 12°C / 53°F | 32 mm | 4 | — |
| June | 15°C / 59°F | 10°C / 51°F | 96 mm | 6 | — |
| July | 15°C / 58°F | 10°C / 49°F | 72 mm | 6 | — |
| August | 15°C / 59°F | 10°C / 50°F | 60 mm | 5 | — |
| September | 16°C / 60°F | 10°C / 51°F | 26 mm | 3 | — |
| October | 17°C / 62°F | 11°C / 52°F | 17 mm | 2 | — |
| November | 18°C / 65°F | 13°C / 55°F | 8 mm | 2 | — |
| December | 20°C / 67°F | 14°C / 57°F | 5 mm | 1 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Valparaíso in September →
Frequently asked questions
How hot is Valparaíso in September?
In September, Valparaíso averages a high of 16°C (60°F) and a low of 10°C (51°F) — generally cool.
Does it rain a lot in Valparaíso in September?
September is generally dry in Valparaíso, with about 3 rainy days on average.
Is September a good time to visit Valparaíso?
September is cool and mostly dry. It suits travelers who are comfortable with cool weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Valparaíso in September?
Pack a warm jacket and layers. See the full September packing list for Valparaíso for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.