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
The average high-temperature shows a slight dip in September, from August's pleasant 71.8°F (22.1°C) to a comfortable 66.4°F (19.1°C). During September, Provincetown's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at 61.9°F (16.6°C).Humidity
In September, the average relative humidity is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 12.7 days and accumulates 2.17" (55mm) of precipitation.Snowfall
In Provincetown, snow does not fall in May through October.Ocean temperature
In Provincetown, in September, the average water temperature is 63.7°F (17.6°C).Note: Swimming in water at 63.7°F (17.6°C) is not a pleasing experience for the majority. As the temperature descends from 69.8°F (21°C) to 59°F (15°C), controlling breathing becomes increasingly hard.
Daylight
In September, the average length of the day in Provincetown is 12h and 28min.On the first day of the month, sunrise is at 6:07 am and sunset at 7:13 pm. On the last day of September, sunrise is at 6:37 am and sunset at 6:23 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 suggests this advice:
Make use of precautions - It is urged to ward off sun damage. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Provincetown in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow in Provincetown?
What is the ocean temperature in September?
How many hours of daylight does Provincetown have in September?
When are sunrise and sunset in September?
How long on average sun shines in September in Provincetown?
What is the UV index reading in September?
Average temperature in September
Provincetown, MA
- Average high temperature in September: 66.4°F
The warmest month (with the highest average high temperature) is August (71.8°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in September
Provincetown, 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 (29.93"Hg).
Average wind speed in September
Provincetown, MA
- Average wind speed in September: 12.6mph
The windiest month (with the highest average wind speed) is January (17.8mph).
The calmest month (with the lowest average wind speed) is August (10.9mph).
Average humidity in September
Provincetown, MA
- Average humidity in September: 80%
The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (74%).
Average rainfall in September
Provincetown, MA
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (2.17").
Average rainfall days in September
Provincetown, MA
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (8.6 days).
Average snowfall in September
Provincetown, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Provincetown, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Provincetown, MA
- Average sea temperature in September: 63.7°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 March (39°F).
Average daylight in September /
Average sunshine in September
Provincetown, MA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).
Average sunshine days in September
Provincetown, MA
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is July (12.6 days).
Average UV index in September
Provincetown, MA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Provincetown, MA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Provincetown, 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).
Provincetown, Massachusetts, USA
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