September weather forecastNewburyport, MA
September
Weather in September
September ushers in a wave of autumnal change in the weather conditions of Newburyport. The regularity of rainfall drops to the lowest for the year, totaling only 1.34" (34mm). A gradual descent in temperature marks the start of the cooler season. Coupled with a decrease in sunshine duration, the fall rhythm begins to establish itself. The wind speed remains fairly consistent, adding a crispness to the air and hinting at the impending chill of winter.Temperature
As Newburyport enters September, the average high-temperature subtly lowers from the a moderately hot 77°F (25°C) of August to an agreeable 70°F (21.1°C). In Newburyport, an average nighttime temperature of 56.8°F (13.8°C) is expected during September.Humidity
In September, the average relative humidity is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 10.6 days and accumulates 1.34" (34mm) of precipitation.Snowfall
May through September are months without snowfall.Ocean temperature
In Newburyport, the average seawater temperature in September is 60.8°F (16°C).Note: Swimming in 60.8°F (16°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases 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, sunrise is at 6:08 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:26 pm EDT.
Sunshine
In Newburyport, the average sunshine in September is 8.6h.UV index
In Newburyport, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Guard yourself - Precautionary measures against sun damage are advocated. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Newburyport, MA
- Average high temperature in September: 70°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in September
Newburyport, 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
Newburyport, MA
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (11.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in September
Newburyport, MA
- Average humidity in September: 77%
The months with the highest relative humidity are February and June (78%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Newburyport, MA
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is December (2.95").
The driest month (with the least rainfall) is September (1.34").
Average rainfall days in September
Newburyport, MA
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is May (15.7 days).
The months with the least rainy days are January and February (8.6 days).
Average snowfall in September
Newburyport, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Newburyport, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in September
Newburyport, MA
- Average sea temperature in September: 61°F
The best month for swimming (with the highest average sea temperature) is August (64°F).
The coldest month (with the lowest average sea temperature) is March (37°F).
Average daylight in September /
Average sunshine in September
Newburyport, MA
- Average daylight in September: 12h and 30min
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 36min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Newburyport, MA
- Average sunshine days in September: 18 days
The month with the most sunshine days is August (18.2 days).
The month with the least sunshine days is March (12.8 days).
Average UV index in September
Newburyport, MA
- Average UV index in September: 4
The months with the highest UV index are June, 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
Newburyport, MA
- Average cloud cover in September: 33
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Newburyport, 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).
