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The climate of Saint Helena, Ascension and Tristan da Cunha
The current climate in Saint Helena, Ascension and Tristan da Cunha features temperatures ranging from a high of 24°C to a low of 18°C throughout the year. 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.
Average temperatures and precipitation
This chart shows the average monthly maximum and minimum temperatures (in degrees Celsius) and average monthly rainfall (in millimeters) for Saint Helena, Ascension and Tristan da Cunha.
Temperature records
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.
Rainfall amount
On average, Saint Helena, Ascension and Tristan da Cunha receives 416 mm of precipitation each year. For comparison, New York gets 1142 mm of precipitation annually.
You can check out all destinations in Saint Helena, Ascension and Tristan da Cunha to get the full picture of the climate.
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 nice 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, rainfall, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall 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.
Temperature charts
These charts display the average temperatures in Saint Helena, Ascension and Tristan da Cunha. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Average Temperature per Month in Saint Helena, Ascension and Tristan da Cunha
Yearly Temperature in Saint Helena, Ascension and Tristan da Cunha
Precipitation charts
These charts show the average amount of precipitation in Saint Helena, Ascension and Tristan da Cunha. Precipitation is always measured as water, even when it falls as snow or hail. The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Average Precipitation per Month in Saint Helena, Ascension and Tristan da Cunha
Total Yearly Precipitation in Saint Helena, Ascension and Tristan da Cunha
UV index chart
This chart 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.
Average UV Index per Month 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. Have you been to Saint Helena, Ascension and Tristan da Cunha? Share your weather experience to help other visitors.
Aimee Mathot
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.
JorisBright blue skies alternate with heavy rain. The temperature is pleasant, around 25 degrees, but the high humidity can be uncomfortable.
Niels ZalmThe 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.
EvaWarm temperatures and lots of sunshine for outdoor activities. It rained occasionally, but overall the experience was good.
IdsThere 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!
LarsThe 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.
Have you been to Saint Helena, Ascension and Tristan da Cunha?
Share your weather experiences in Saint Helena, Ascension and Tristan da Cunha.
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.