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What is the climate like in Saint Helena, Ascension and Tristan da Cunha?

The climate of Saint Helena, Ascension and Tristan da Cunha has an average yearly temperature of 22°C. Throughout the year, the average monthly temperature can drop to 18°C and rise to 24°C.

Annually, about 410 mm of rain falls. This gives a good overview of how much rain to expect in Saint Helena, Ascension and Tristan da Cunha.

The best time to visit Saint Helena, Ascension and Tristan da Cunha is January until December. During this period, you will experience pleasant temperatures and not too much rain, making it ideal to visit Saint Helena, Ascension and Tristan da Cunha.

Temperature 18 to 24°C
Rain 410 mm

GoodStarStarStarStar

The difference between mild heat and a few days of rain prov... more

Aimee Mathot

ModerateStarStarStar

Bright blue skies alternate with heavy rain. The temperature... more

Joris

The climate of Saint Helena, Ascension and Tristan da Cunha
  • Average yearly temperature: 22°C
  • Highest temperature: 24°C in February and March
  • Lowest temperature: 18°C in August
  • Precipitation: 410 mm per year, averaging 34 mm by month
  • Driest months: 15 mm in November, 16 mm in December and 18 mm in October
  • Wettest months: 59 mm in July, 50 mm in March and 45 mm in June

Climate table Saint Helena, Ascension and Tristan da Cunha

The climate table for Saint Helena, Ascension and Tristan da Cunha shows the average temperatures, precipitation, and UV index by month.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daytime temperature (°C) 23 24 24 23 22 21 19 18 19 19 20 21
Nighttime temperature (°C) 19 20 20 20 19 17 16 15 15 16 16 17
Precipitation (mm) 29 37 50 38 30 45 59 39 34 18 15 16
UV Index 10 10 9 8 7 6 6 7 8 8 9 9
Best month Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Temperature by month in Saint Helena, Ascension and Tristan da Cunha

This graph shows the average high temperatures in degrees Celsius for each month in Saint Helena, Ascension and Tristan da Cunha

Temperature by month in Saint Helena, Ascension and Tristan da Cunha

Precipitation by month in Saint Helena, Ascension and Tristan da Cunha

This graph shows the average monthly precipitation in millimeters in Saint Helena, Ascension and Tristan da Cunha.

Precipitation by month in Saint Helena, Ascension and Tristan da Cunha

UV index by month in Saint Helena, Ascension and Tristan da Cunha

This graph shows the average UV index by month in Saint Helena, Ascension and Tristan da Cunha.

UV index by month in Saint Helena, Ascension and Tristan da Cunha

Yearly temperature in Saint Helena, Ascension and Tristan da Cunha

This graph shows the average yearly temperature in Saint Helena, Ascension and Tristan da Cunha, measured in degrees Celsius.

Yearly temperature in Saint Helena, Ascension and Tristan da Cunha

Yearly total precipitation in Saint Helena, Ascension and Tristan da Cunha

This graph shows the average yearly precipitation in millimeters in Saint Helena, Ascension and Tristan da Cunha.

Precipitation per year in Saint Helena, Ascension and Tristan da Cunha

Weather experiences in Saint Helena, Ascension and Tristan da Cunha

The weather in Saint Helena, Ascension and Tristan da Cunha is rated an average of 3,7 out of 5 stars by 6 visitors.

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Weather Experience: Good StarStarStarStar

The difference between mild heat and a few days of rain provided the perfect combination of sunshine and coolness. The mountain peaks were sometimes covered in fog, but this added to the mystical atmosphere.— This text has been automatically translated into English

Weather Experience: Moderate StarStarStar

Bright blue skies alternate with heavy rain. The temperature is pleasant, around 25 degrees, but the high humidity can be uncomfortable.— This text has been automatically translated into English

Weather Experience: Good StarStarStarStar

The day is warm but not too hot, ideal for relaxing. In the evening hours, however, it can be a bit cooler, so bring a jacket. I saw a little rain during my stay.— This text has been automatically translated into English

Weather Experience: Good StarStarStarStar

Warm temperatures and lots of sunshine for outdoor activities. It rained occasionally, but overall the experience was good.— This text has been automatically translated into English

Weather Experience: Good StarStarStarStar

There is a refreshing cool breeze and frequent sunshine with moderate temperatures. However, there can be occasional showers, so it is advisable to always carry an umbrella!— This text has been automatically translated into English

Weather Experience: Moderate StarStarStar

The December weather on the islands of St. Helena, Ascension and Tristan da Cunha left much to be desired. It was often cloudy and occasionally rained. Temperatures can be pleasant, but not ideal for outdoor activities.— This text has been automatically translated into English

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Average weather in Saint Helena, Ascension and Tristan da Cunha by month

Click on a month below to see in detail how the weather typically is in Saint Helena, Ascension and Tristan da Cunha and what to expect. Based on the historical weather data of Saint Helena, Ascension and Tristan da Cunha, you can view the average temperature, precipitation, wind, and UV index for each day of the month.