Normal weather for Sully Island in September
It's pleasantly warm in September in Sully Island with an average temperature of 19°C. Temperatures this month range from a low of 16°C to a high of 20°C. At night, you can expect temperatures between 10°C and 14°C.
In September, there is an average of 92 mm of precipitation, spread over 12 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Sully Island in September |
London | ||
|---|---|---|---|
 Average Temperature |
19°C | 20°C | |
 High Temp |
20°C | 22°C | |
| Low Temp |
16°C | 17°C | |
 Total Precipitation |
92 mm | 44 mm | |
| Rainy Days |
12 days | 8 days | |
Start of September
The month of September starts in Sully Island with mild temperatures, averaging around 20°C during the day and nights close to 13°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 drops to around 19°C, with nights close to 12°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 Sully Island will be around 18°C, with nights close to 11°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
Is September a good time to visit Sully Island?
Want nice weather? Then September is a great time to be in Sully Island. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Sully Island in September
With 28°C, Sully Island hit the highest temperature in the last 10 years in September 2021. The lowest daytime temperature in this month was 10°C in 2018. The extreme night temperatures ranged from a low of 0°C to a high of 21°C.
Check out the climate of Sully Island for all months and discover the best travel time
August
Daily Temperature in September in Sully Island
This chart shows the average daily temperatures, both day and night, for each day in September in Sully Island, 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 Sully Island
The chart below shows the average daily precipitation in September for Sully Island, 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 12 days of rain in Sully Island.
Daily UV Index in September in Sully Island
This chart shows the average daily UV index in September in Sully Island, 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 Sully Island Over the Years
This chart shows the average temperature in September in Sully Island, measured in degrees Celsius, over the past years.
Total Precipitation in September in Sully Island Over the Years
This chart shows the average precipitation in September in Sully Island, 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 Sully Island
Click on a specific day in September for detailed info on the typical weather on that day in Sully Island. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Sully Island
Have you been to Sully Island in September?
Share your weather experience in September in Sully Island.
Average Weather in Sully Island by Month
Click on a month below to see detailed weather info for Sully Island. 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 Sully Island for all months at once
