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.
Sully Island in September |
New York | ||
|---|---|---|---|
 Average Temperature |
19°C | 27°C | |
 High Temp |
20°C | 31°C | |
| Low Temp |
16°C | 21°C | |
 Total Precipitation |
92 mm | 57 mm | |
| Rainy Days |
12 days | 9 days | |
Start of September
The month of September starts in Sully Island with mild temps, averaging around 20°C during the day and nights around 13°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
Mid September
By mid-September, daytime temps drop to around 19°C, with nights around 12°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
Since it cools down at night, it’s a good idea to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
End of September
By the end of September, the average daytime temperature in Sully Island is around 18°C, while nighttime temps are about 11°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Because temperatures drop in the evening, wearing layers is recommended. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
UV index
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.
Is September a good time to visit Sully Island?
Looking for great weather? September is a good time to be in Sully Island. The temperatures are nice, and there’s not too much rain.
Temperature records for Sully Island in September
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 high and low temperatures in September for Sully Island, 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 September in Sully Island
The chart below shows the average daily precipitation in September for Sully Island, 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 September, you can expect about 12 days of precipitation 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 few years.
Total Precipitation in September in Sully Island Over the Years
This chart shows the average precipitation in September in Sully Island, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in September for Sully Island
Click on any day in September to get detailed info about the usual 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
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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
