September weather forecastMashpee, MA
September
Weather in September
September in Mashpee, Massachusetts captures Autumn's onset with temperatures receding marginally to lie between 62.2°F (16.8°C) and 68.2°F (20.1°C). While the rainfall amounts remain slightly low at 1.85in, the increasing cloud cover points towards the seasonal change. The month celebrates the transition phase from summer to autumn beautifully, with warm days gradually giving way to cooler nights. Early foliage colors with a lingering summer warmth embroider the surroundings into a picturesque canvas. Thus, September has Mashpee basking in the lure of the remaining summer while embracing the freshness of upcoming autumn.Temperature
The advent of September brings a slight shift in average high-temperature, moving from a moderately hot 73.6°F (23.1°C) in August to an agreeable 68.2°F (20.1°C). During September, Mashpee perceives a slight decrease in temperature from daytime highs, settling at an average low of 62.2°F (16.8°C).Humidity
The average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.85" (47mm) of precipitation.Snowfall
In Mashpee, snow does not fall in May through October.Daylight
In Mashpee, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:08 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:38 am and sunset at 6:24 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Mashpee is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 5 in September translates into this advice:
Take necessary precautions - Defending against sun damage is advocated. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mashpee, MA
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is August (73.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is August (68.4°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in September
Mashpee, 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
Mashpee, MA
- Average wind speed in September: 11.7mph
The windiest month (with the highest average wind speed) is January (15.3mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).
Average humidity in September
Mashpee, MA
- Average humidity in September: 79%
The months with the highest relative humidity are May, June and July (82%).
The month with the lowest relative humidity is November (74%).
Average rainfall in September
Mashpee, MA
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Mashpee, MA
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is April (15.6 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Mashpee, MA
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.36").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Mashpee, 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 daylight in September /
Average sunshine in September
Mashpee, MA
- Average daylight in September: 12h and 30min
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 12min).
- Average sunshine in September: 8h and 42min
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 36min).
Average sunshine days in September
Mashpee, MA
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is September (16.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in September
Mashpee, 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, November and December (UV index 2).
Average cloud cover in September
Mashpee, MA
- Average cloud cover in September: 32
The months with the most cloud cover are March and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Mashpee, 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).
