What’s the climate like in Saint Helena, Ascension and Tristan da Cunha?
The current climate of Saint Helena, Ascension and Tristan da Cunha features average monthly temperatures ranging from highs of 24°C during the day to lows of 18°C. The average yearly temperature is around 22°C. At night, temperatures in the colder months average around 15°C and in the warmer months around 20°C.
The highest temperature recorded in Saint Helena, Ascension and Tristan da Cunha in recent years was 29°C in September 2022. The lowest daytime temperature recorded was 15°C in September 2020.
On average, Saint Helena, Ascension and Tristan da Cunha receives 416 mm of precipitation each year. For comparison, UK gets 701 mm of precipitation annually.
You can check out all destinations in Saint Helena, Ascension and Tristan da Cunha for a full picture of the climate.
Check out the weather for Saint Helena, Ascension and Tristan da Cunha 
Best time to visit Saint Helena, Ascension and Tristan da Cunha?
The best time to visit Saint Helena, Ascension and Tristan da Cunha for sunny weather is January through December. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Saint Helena, Ascension and Tristan da Cunha.
Climate Table of Saint Helena, Ascension and Tristan da Cunha
The climate table of Saint Helena, Ascension and Tristan da Cunha shows the average temperatures, precipitation, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 23 | 24 | 24 | 23 | 22 | 21 | 19 | 18 | 19 | 19 | 20 | 21 |
| Temp. min (°C) | 19 | 20 | 20 | 20 | 19 | 17 | 16 | 15 | 15 | 16 | 16 | 17 |
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| Precipitation (mm) | 29 | 43 | 50 | 38 | 30 | 45 | 59 | 39 | 34 | 18 | 15 | 16 |
| UV Index | 10 | 10 | 9 | 8 | 7 | 6 | 6 | 7 | 8 | 9 | 9 | 9 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 22°C
- Highest temperature: 24°C in February and March
- Lowest temperature: 18°C in August
- Precipitation: 416 mm per year, averaging 35 mm per 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
Weather experiences in Saint Helena, Ascension and Tristan da Cunha
Good
The difference between mild heat and a few days of rain prov... more
Good
The day is warm but not too hot, ideal for relaxing. However... more
Table of Contents
Average Temperature per Month in Saint Helena, Ascension and Tristan da Cunha
This graph shows the average maximum temperatures per month in Saint Helena, Ascension and Tristan da Cunha. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Saint Helena, Ascension and Tristan da Cunha
This graph shows how much precipitation Saint Helena, Ascension and Tristan da Cunha gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average UV Index per Month in Saint Helena, Ascension and Tristan da Cunha
This graph shows the average UV index per month in Saint Helena, Ascension and Tristan da Cunha. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
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. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Saint Helena, Ascension and Tristan da Cunha
This chart shows the total yearly precipitation in Saint Helena, Ascension and Tristan da Cunha over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
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. Have you been to Saint Helena, Ascension and Tristan da Cunha? Share your weather experience to help other visitors.
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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 is automatically translated to English
Bright blue skies alternate with heavy rain. The temperature is pleasant, around 25 degrees, but the high humidity can be uncomfortable.— This text is automatically translated to English
The day is warm but not too hot, ideal for relaxing. However, it can be a bit cooler in the evening, so bring a jacket. I saw a bit of rain during my stay.— This text is automatically translated to English
Warm temperatures and plenty of sunshine for outdoor activities. It rained occasionally, but overall the experience was good.— This text is automatically translated to English
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 is automatically translated to English
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 is automatically translated to English
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Average Weather in Saint Helena, Ascension and Tristan da Cunha by Month
Click on a month below to see detailed weather info for Saint Helena, Ascension and Tristan da Cunha. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
