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
September is marked by a subtle drop in average high-temperatures, transitioning from a moderately hot 78.6°F (25.9°C) in August to a pleasant 71.2°F (21.8°C). Nightly temperatures in Westport drop to an average low of 50.5°F (10.3°C) in September.Humidity
The average relative humidity in September is 81%.Rainfall
In September, in Westport, the rain falls for 13.2 days. Throughout September, 2.28" (58mm) of precipitation is accumulated. Throughout the year, in Westport, there are 179.8 rainfall days, and 32.36" (822mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:38 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:54 pm EDT.
Sunshine
In Westport, the average sunshine in September is 8.3h.UV index
In September, the average daily maximum UV index in Westport is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 3 in September translates into this advice:
Undertake precautions - Guarding against sun damage is counselled. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What is the average September temperature in Westport?
What is the average humidity in September in Westport?
How much does it rain in Westport in September?
When it does not snow in Westport?
Does it snow in Westport in September?
What is the average length of the day in September in Westport?
What time are sunrise and sunset in September in Westport?
How long on average sun shines in September in Westport?
What is the UV index reading in September in Westport?
Average temperature in September
Westport, PA
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in September
Westport, PA
- Average pressure in September: 30.07"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Westport, PA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Westport, PA
- Average humidity in September: 81%
The months with the highest relative humidity are February and December (86%).
The month with the lowest relative humidity is July (77%).
Average rainfall in September
Westport, PA
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is November (2.2").
Average rainfall days in September
Westport, PA
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (11.1 days).
Average snowfall in September
Westport, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Westport, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Westport, PA
- 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 18min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).
Average sunshine days in September
Westport, PA
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is September (14.9 days).
The month with the least sunshine days is February (7.7 days).
Average UV index in September
Westport, PA
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Westport, PA
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in September
Westport, PA
- Average visibility in September: 4mi
The months with the highest visibility are March, April, May, June, July, August, October and November (5mi).
The months with the lowest visibility are January, February, September and December (4mi).
Westport, Pennsylvania, USA
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