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 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
With September's arrival, West Yarmouth notes an average high-temperature of an enjoyable 67.1°F (19.5°C), closely following the trend of the preceding month. A mild drop to an average of 63°F (17.2°C) marks the nights during September.Humidity
In West Yarmouth, the average relative humidity in September is 79%.Rainfall
In West Yarmouth, in September, during 9.5 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. In West Yarmouth, during the entire year, the rain falls for 129 days and collects up to 14.21" (361mm) of precipitation.Snowfall
May through November are months without snowfall.Daylight
In September, the average length of the day in West Yarmouth is 12h and 28min.On the first day of September, sunrise is at 6:07 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 6:23 pm EDT.
Sunshine
The average sunshine in September in West Yarmouth, Massachusetts, is 8.7h.UV index
In West Yarmouth, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Be vigilant - Preventing sunburn is recommended. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What are September temperatures in West Yarmouth?
What is the average humidity in September in West Yarmouth?
How much does it rain in West Yarmouth in September?
When it does not snow in West Yarmouth?
How many hours of daylight does West Yarmouth have in September?
What time are sunrise and sunset in September in West Yarmouth?
How many hours of sunshine does West Yarmouth have in September?
What is the UV index reading in September in West Yarmouth?
Average temperature in September
West Yarmouth, MA
- Average high temperature in September: 67.1°F
The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (38.5°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
West Yarmouth, 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
West Yarmouth, MA
- Average wind speed in September: 12.8mph
The windiest month (with the highest average wind speed) is January (16.8mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).
Average humidity in September
West Yarmouth, MA
- Average humidity in September: 79%
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
West Yarmouth, MA
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is August (0.94").
Average rainfall days in September
West Yarmouth, MA
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in September
West Yarmouth, MA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.87").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in September
West Yarmouth, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.4 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
West Yarmouth, MA
- Average daylight in September: 12h and 3min
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 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 36min).
Average sunshine days in September
West Yarmouth, MA
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (14.3 days).
Average UV index in September
West Yarmouth, 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
West Yarmouth, MA
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
West Yarmouth, 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).
West Yarmouth, Massachusetts, USA
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