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
Rockport experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a pleasant 73°F (22.8°C) in August to an enjoyable 67.3°F (19.6°C). Rockport's evenings during September maintain an average temperature of 59.9°F (15.5°C), aligning closely with the daytime temperatures.Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall in Rockport. Rain falls for 11.9 days and accumulates 1.73" (44mm) of precipitation.Snowfall
May through October are months without snowfall.Ocean temperature
In September, the average ocean temperature in Rockport is 62.6°F (17°C).Note: A surface water temperature of 62.6°F (17°C) does not provide an enjoyable swimming experience for most. Breathing control becomes more challenging as the water temperature drops below 69.8°F (21°C).
Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Rockport, sunrise is at 6:08 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:25 pm EDT.
Sunshine
In Rockport, Massachusetts, the average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Frequently asked questions
What are September temperatures in Rockport?
What is the average humidity in September in Rockport?
What is the driest month in Rockport?
How many days does it rain in September in Rockport?
When it does not snow in Rockport?
What is the ocean temperature in September in Rockport?
What is the average length of the day in September in Rockport?
When is the sunrise / sunset in September in Rockport?
How long on average sun shines in September in Rockport?
How high is the UV index in September in Rockport?
Average temperature in September
Rockport, MA
- Average high temperature in September: 67.3°F
The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Rockport, 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 (29.92"Hg).
Average wind speed in September
Rockport, MA
- Average wind speed in September: 10.2mph
The windiest month (with the highest average wind speed) is January (15.2mph).
The calmest months (with the lowest average wind speed) are July and August (8.9mph).
Average humidity in September
Rockport, MA
- Average humidity in September: 78%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Rockport, MA
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is December (3.23").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in September
Rockport, MA
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in September
Rockport, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Rockport, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Rockport, MA
- Average sea temperature in September: 62.7°F
The best month for swimming (with the highest average sea temperature) is August (66.4°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).
Average daylight in September /
Average sunshine in September
Rockport, MA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Rockport, MA
- Average sunshine days in September: 16.7 days
The months with the most sunshine days are September and November (16.7 days).
The month with the least sunshine days is February (13.1 days).
Average UV index in September
Rockport, MA
- Average UV index in September: 4
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, November and December (UV index 2).
Average cloud cover in September
Rockport, MA
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Rockport, 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).
Rockport, Massachusetts, USA
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