Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
As September unfolds in Nantucket, the average high-temperature reaches an enjoyable 67.6°F, hinting at a slight fluctuation from the previous month. Nantucket, during September nights, experiences a subtle shift to a low average of 63.9°F from the day's heat.Humidity
In September, the average relative humidity is 80%.Rainfall
In Nantucket, during September, the rain falls for 11.7 days and regularly aggregates up to 2.2" of precipitation. In Nantucket, during the entire year, the rain falls for 153 days and collects up to 26.61" of precipitation.Snowfall
April through October are months without snowfall.Ocean temperature
In September, the average ocean temperature in Nantucket, Massachusetts, is 65.1°F.Note: For the majority, swimming in water with a temperature of 65.1°F is not enjoyable. The difficulty in managing breathing rises as the temperature decreases from 69.8°F to 59°F.
Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:06 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 6:24 pm EDT.
Sunshine
In Nantucket, the average sunshine in September is 8.6h.UV index
In Nantucket, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, a daily UV index of 5 turns into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
FAQ
What is the temperature in September in Nantucket?
What is the average humidity in September in Nantucket?
How much does it rain in Nantucket in September?
When it does not snow in Nantucket?
What is the ocean temperature in September in Nantucket?
How many hours of daylight does Nantucket have in September?
When is the sunrise / sunset in September in Nantucket?
How many hours of sunshine does Nantucket have in September?
What is the UV index reading in September in Nantucket?
Average temperature in September
Nantucket, MA
- Average high temperature in September: 67.6°F
The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is February (39.7°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is August (68.7°F).
The coldest month (with the lowest average low temperature) is February (32.5°F).
Average pressure in September
Nantucket, MA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Nantucket, MA
- Average wind speed in September: 14mph
The windiest month (with the highest average wind speed) is January (18.5mph).
The calmest month (with the lowest average wind speed) is August (11.8mph).
Average humidity in September
Nantucket, MA
- Average humidity in September: 80%
The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are January, November and December (75%).
Average rainfall in September
Nantucket, MA
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is November (1.77").
Average rainfall days in September
Nantucket, MA
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (9.2 days).
Average snowfall in September
Nantucket, MA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Nantucket, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Nantucket, MA
- Average sea temperature in September: 65.1°F
The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is February (37.9°F).
Average daylight in September /
Average sunshine in September
Nantucket, MA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in September
Nantucket, MA
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is August (16.5 days).
The month with the least sunshine days is January (11.3 days).
Average UV index in September
Nantucket, MA
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in September
Nantucket, MA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Nantucket, MA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Nantucket, Massachusetts, USA
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