Saint Helena Island
Saint Helena, Ascension and Tristan da Cunha
Long-term weather forecast
Long-term weather forecast

March weather forecast and climate
Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha

The Longwood house, an ancient exile residence of Napoleon, in Saint Helena Island, Sanit Helena
The Longwood house, an ancient exile residence of Napoleon, in Saint Helena Island, Sanit Helena
  • Average high temperature in March: 23°C

Warmest months (with the highest average high temperature) are February and March (23°C).
The month with the lowest average high temperature is August (17°C).

  • Average low temperature in March: 19°C

Months with the highest average low temperature are February and March (19°C).
The coldest month (with the lowest average low temperature) is August (14°C).

  • Average rainfall in March: 90mm

The wettest month (with the highest rainfall) is March (90mm).
The driest month (with the lowest rainfall) is November (30mm).

  • Average rainfall days in March: 15 days

Months with the highest number of rainy days are June and July (16 days).
Months with the lowest number of rainy days are September and December (12 days).

  • Average sea temperature in March: 25°C

Best months for swimming (with the highest average sea temperature) are February, March and April (25°C).
The coldest month (with the lowest average sea temperature) is October (20°C).

  • Average daylight in March: 12.9h

The month with the longest days is December (Average daylight: 13.9h).
Months with shortest days are June and July (Average daylight: 12h).

  • Average sunshine in March: 15h

Months with most sunshine are June and July (Average sunshine: 16h).
Months with least sunshine are September and December (Average sunshine: 12).

  • Average UV index in March: 12

Months with the highest UV index are January, February, March, October, November and December (UV index 12).
The month with the lowest UV index is June (UV index 7).

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