Average weather for Saint Helena, Ascension and Tristan da Cunha in August
It's cool to moderate in August in Saint Helena, Ascension and Tristan da Cunha with an average temperature of 18°C. Temperatures this month range from a low of 18°C to a high of 19°C. At night, you can expect temperatures between 15°C and 16°C.
Start of August
The month of August starts in Saint Helena, Ascension and Tristan da Cunha with mild temps, averaging around 19°C during the day and nights around 16°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid August
By mid-August, daytime temps stay steady at around 19°C, with nights around 16°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of August
By the end of August, the average daytime temperature in Saint Helena, Ascension and Tristan da Cunha is around 19°C, while nighttime temps are about 15°C. A shower might pop up, but overall, the weather will be dry and sunny.
In August, there is an average of 39 mm of precipitation, spread over 11 days. The wind speed is around 5 Bft, mostly coming from the Southeast.
Saint Helena, Ascension and Tristan da Cunha in August |
New York | ||
|---|---|---|---|
 Average temperature |
18°C | 30°C | |
 Max. temperature |
19°C | 31°C | |
| Min. temperature |
18°C | -5°C | |
 Total precipitation |
39 mm | 79 mm | |
| Rainy days |
11 days | 13 days | |
July
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is August a good time to visit Saint Helena, Ascension and Tristan da Cunha?
Looking for great weather? August is a good time to be in Saint Helena, Ascension and Tristan da Cunha. The temperatures are nice, and there’s not too much rain.
Temperature records
With 23°C in 2022, Saint Helena, Ascension and Tristan da Cunha reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 15°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 11°C to a highest value of 17°C.
Daily Temperature in August in Saint Helena, Ascension and Tristan da Cunha
This chart shows the average daily high and low temperatures in August for Saint Helena, Ascension and Tristan da Cunha, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in August in Saint Helena, Ascension and Tristan da Cunha
The chart below shows the average daily precipitation in August for Saint Helena, Ascension and Tristan da Cunha, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for August, you can expect about 11 days of precipitation in Saint Helena, Ascension and Tristan da Cunha.
Daily UV index in August in Saint Helena, Ascension and Tristan da Cunha
This chart shows the average daily UV index in August in Saint Helena, Ascension and Tristan da Cunha, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in Saint Helena, Ascension and Tristan da Cunha over the years
This chart shows the average temperature in August in Saint Helena, Ascension and Tristan da Cunha, measured in degrees Celsius, over the past few years.
Total precipitation in August in Saint Helena, Ascension and Tristan da Cunha over the years
This chart shows the average precipitation in August in Saint Helena, Ascension and Tristan da Cunha, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in August for Saint Helena, Ascension and Tristan da Cunha
Click on any day in August to get detailed info about the usual weather on that day in Saint Helena, Ascension and Tristan da Cunha. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Saint Helena, Ascension and Tristan da Cunha
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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.
Or check out the climate of Saint Helena, Ascension and Tristan da Cunha for all months at once
