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
Harwich Port's average high-temperature in September is a comfortable 66.6°F (19.2°C), indicating a subtle variation from August. Harwich Port's average nighttime temperature in September modestly descends to 63.3°F (17.4°C).Humidity
In Harwich Port, the average relative humidity in September is 80%.Rainfall
In Harwich Port, in September, it is raining for 10.7 days, with typically 1.85" (47mm) of accumulated precipitation. In Harwich Port, during the entire year, the rain falls for 142.4 days and collects up to 22.09" (561mm) of precipitation.Snowfall
May through October are months without snowfall in Harwich Port.Ocean temperature
In September, the average ocean temperature in Harwich Port is 64.2°F (17.9°C).Note: The enjoyment of swimming decreases for most when the surface water temperature is 64.2°F (17.9°C). Breathing control becomes increasingly challenging as temperatures descend below 69.8°F (21°C).
Daylight
In Harwich Port, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:06 am and sunset at 7:13 pm. On the last day of September, in Harwich Port, sunrise is at 6:36 am and sunset at 6:23 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September in Harwich Port is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What is the temperature in September in Harwich Port?
What is the average humidity in September in Harwich Port?
How many days does it rain in September in Harwich Port?
When it does not snow in Harwich Port?
What is the ocean temperature in September in Harwich Port?
What is the average length of the day in September in Harwich Port?
When is the sunrise / sunset in September in Harwich Port?
How many hours of sunshine does Harwich Port have in September?
What is the UV index intensity in September in Harwich Port?
Average temperature in September
Harwich Port, MA
- Average high temperature in September: 66.6°F
The warmest month (with the highest average high temperature) is August (71.6°F).
The months with the lowest average high temperature are January and February (39°F).
- Average low temperature in September: 63.3°F
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).
Average pressure in September
Harwich Port, 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
Harwich Port, MA
- Average wind speed in September: 13.5mph
The windiest month (with the highest average wind speed) is January (18mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).
Average humidity in September
Harwich Port, MA
- Average humidity in September: 80%
The months with the highest relative humidity are June and July (85%).
The month with the lowest relative humidity is November (74%).
Average rainfall in September
Harwich Port, MA
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is November (1.46").
Average rainfall days in September
Harwich Port, MA
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in September
Harwich Port, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Harwich Port, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Harwich Port, MA
- Average sea temperature in September: 64.3°F
The best month for swimming (with the highest average sea temperature) is August (67.5°F).
The coldest month (with the lowest average sea temperature) is March (39°F).
Average daylight in September /
Average sunshine in September
Harwich Port, 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 3min
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 18min).
Average sunshine days in September
Harwich Port, MA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is January (13 days).
Average UV index in September
Harwich Port, 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
Harwich Port, 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
Harwich Port, 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).
Harwich Port, Massachusetts, USA
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