September weather forecast
Valparaíso, Chile

Weather in September

September, the first month of the spring, in Valparaíso, is also a moderate month, with average temperature fluctuating between 15.4°C (59.7°F) and 9.5°C (49.1°F).

Temperature

In September, the average high-temperature is relatively the same as in August - a still moderate 15.4°C (59.7°F). The average low-temperature, in September, is 9.5°C (49.1°F).

Humidity

In Valparaíso, the average relative humidity is 78%.

Rainfall

In September, in Valparaíso, the rain falls for 2.7 days. Throughout September, 26.7mm (1.05") of precipitation is accumulated. In Valparaíso, during the entire year, the rain falls for 26.6 days and collects up to 372.5mm (14.67") of precipitation.

Sea temperature

In Valparaíso, the average water temperature is 13.2°C (55.8°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

In Valparaíso, Chile, the average length of the day in September is 11.9h.

Sunshine

In Valparaíso, the average sunshine is 4.9h.

UV index

In Valparaíso, Chile, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Valparaíso?

In September, the average relative humidity in Valparaíso, Chile, is 78%.

How many days does it rain in September in Valparaíso?

In Valparaíso, in September, during 2.7 rainfall days, 26.7mm (1.05") of precipitation is typically accumulated.

What is the water temperature in September in Valparaíso?

In Valparaíso, Chile, the average seawater temperature in September is 13.2°C (55.8°F). Swimming in 13.2°C (55.8°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Valparaíso have in September?

The average length of the day in September is 11.9h.

How long on average sun shines in September in Valparaíso?

In September, the average sunshine in Valparaíso is 4.9h.

What is the UV index intensity in September in Valparaíso?

In September, the average daily maximum UV index in Valparaíso is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.

Average temperature in September
Valparaíso, Chile

Average temperature in September - Valparaíso, Chile
  • Average high temperature in September: 15.4°C

The warmest month (with the highest average high temperature) is January (20.8°C).
The month with the lowest average high temperature is July (14.3°C).

  • Average low temperature in September: 9.5°C

Months with the highest average low temperature are January and February (13.5°C).
The coldest month (with the lowest average low temperature) is July (9.2°C).

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Average humidity in September
Valparaíso, Chile

Average humidity in September - Valparaíso, Chile
  • Average humidity in September: 78%

Months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is December (70%).

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Average rainfall in September
Valparaíso, Chile

Average rainfall in September - Valparaíso, Chile
  • Average rainfall in September: 26.7mm

The wettest month (with the highest rainfall) is July (111.2mm).
The driest month (with the least rainfall) is February (0mm).

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Average rainfall days in September
Valparaíso, Chile

Average rainfall days in September - Valparaíso, Chile
  • Average rainfall days in September: 2.7 days

The month with the highest number of rainy days is July (6.3 days).
The month with the least rainy days is February (0 days).

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Average sea temperature in September
Valparaíso, Chile

Average sea temperature in September - Valparaíso, Chile
  • Average sea temperature in September: 13.2°C

The best month for swimming (with the highest average sea temperature) is February (17.9°C).
The coldest month (with the lowest average sea temperature) is July (13.1°C).

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Average daylight in September /
Average sunshine in September
Valparaíso, Chile

Average daylight in September / Average sunshine in September - Valparaíso, Chile
  • Average daylight in September: 11.9h

The month with the longest days is December (Average daylight: 14.3h).
The month with the shortest days is June (Average daylight: 10h).

  • Average sunshine in September: 4.9h

The month with the most sunshine is January (Average sunshine: 9h).
The month with the least sunshine is June (Average sunshine: 2.7h).

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Average UV index in September
Valparaíso, Chile

Average UV index in September - Valparaíso, Chile
  • Average UV index in September: 6

Months with the highest UV index are January and December (UV index 12).
Months with the lowest UV index are June and July (UV index 3).

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