Charlotte Amalie
United States Virgin Islands, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Charlotte Amalie, VI

An aerial night view of the Charlotte Amalie Harbour within the United States Virgin Islands, USA
An aerial night view of the Charlotte Amalie Harbour within the United States Virgin Islands, USA
  • Average high temperature in September: 90°F

The warmest month (with the highest average high temperature) is August (90.2°F).
Months with the lowest average high temperature are January and February (85.1°F).

  • Average low temperature in September: 78°F

The month with the highest average low temperature is August (78.1°F).
The coldest month (with the lowest average low temperature) is February (72.3°F).

  • Average rainfall in September: 4.8"

The wettest month (with the highest rainfall) is November (6").
The driest month (with the lowest rainfall) is March (1.1").

  • Average rainfall days in September: 14.6 days

The month with the highest number of rainy days is November (17.8 days).
The month with the lowest number of rainy days is March (8.1 days).

  • Average sea temperature in September: 85°F

The best month for swimming (with the highest average sea temperature) is September (85°F).
The coldest month (with the lowest average sea temperature) is February (78.7°F).

  • Average daylight in September: 12h

Months with the longest days are April, May, June, July and August (Average daylight: 13h).
Months with shortest days are January, November and December (Average daylight: 11h).

  • Average sunshine in September: 8h

Months with most sunshine are March, April, July and August (Average sunshine: 9h).
Months with least sunshine are November and December (Average sunshine: 7).

  • Average UV index in September: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).

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