Temperatures in September
It's pleasantly warm in September in Saint Helena, Ascension and Tristan da Cunha with an average temperature of 19°C. Temperatures this month range from a low of 18°C to a high of 20°C. At night, you can expect temperatures between 15°C and 16°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Saint Helena, Ascension and Tristan da Cunha in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Saint Helena, Ascension and Tristan da Cunha with mild temperatures, averaging around 19°C during the day and nights close to 16°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature stays the same at 19°C, with nights close to 15°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of September
By the end of September, the average daytime temperature in Saint Helena, Ascension and Tristan da Cunha will be around 19°C, with nights close to 15°C. A shower might show up, but overall the weather will be dry and sunny.
Precipitation in September
In September, there is an average of 34 mm of precipitation, spread over 11 days. The wind speed is around 5 Bft, mostly coming from the Southeast.
The average precipitation chance is 37% per day this month. The weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Saint Helena, Ascension and Tristan da Cunha. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Saint Helena, Ascension and Tristan da Cunha in September |
UK | ||
|---|---|---|---|
 Average Temperature |
19°C | 20°C | |
 High Temp |
20°C | 22°C | |
| Low Temp |
18°C | 17°C | |
 Total Precipitation |
34 mm | 44 mm | |
| Rainy Days |
11 days | 8 days | |
August
UV index
The UV index is a maximum of 9 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 September a good time to visit Saint Helena, Ascension and Tristan da Cunha?
Want nice weather? Then September is a great time to be in Saint Helena, Ascension and Tristan da Cunha. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Saint Helena, Ascension and Tristan da Cunha in September
With 29°C, Saint Helena, Ascension and Tristan da Cunha hit the highest temperature in the last 10 years in September 2022. The lowest daytime temperature in this month was 15°C in 2020. The extreme night temperatures ranged from a low of 12°C to a high of 19°C.
You can check out all destinations in Saint Helena, Ascension and Tristan da Cunha for a full picture of the climate.
Daily Temperature in September in Saint Helena, Ascension and Tristan da Cunha
This chart shows the average daily temperatures, both day and night, for each day in September in Saint Helena, Ascension and Tristan da Cunha, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Saint Helena, Ascension and Tristan da Cunha
The chart below shows the average daily precipitation in September for Saint Helena, Ascension and Tristan da Cunha, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 11 days of rain in Saint Helena, Ascension and Tristan da Cunha.
Daily UV Index in September in Saint Helena, Ascension and Tristan da Cunha
This chart shows the average daily UV index in September 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 September in Saint Helena, Ascension and Tristan da Cunha Over the Years
This chart shows the average temperature in September in Saint Helena, Ascension and Tristan da Cunha, measured in degrees Celsius, over the past years.
Total Precipitation in September in Saint Helena, Ascension and Tristan da Cunha Over the Years
This chart shows the average precipitation in September in Saint Helena, Ascension and Tristan da Cunha, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Saint Helena, Ascension and Tristan da Cunha
Click on a specific day in September for detailed info on the typical 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 September in Saint Helena, Ascension and Tristan da Cunha
Have you been to Saint Helena, Ascension and Tristan da Cunha in September?
Share your weather experience in September 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.
Or check out the climate of Saint Helena, Ascension and Tristan da Cunha for all months at once
