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
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a moderately hot 76.6°F (24.8°C) in August to a pleasant 70.3°F (21.3°C). Westline cools down to an average low-temperature of 50.7°F (10.4°C) throughout the month of September.Humidity
In September, the average relative humidity in Westline is 81%.Rainfall
The month with the least rainfall in Westline is September, when the rain falls for 15 days and typically collects 2.24" (57mm) of precipitation.Snowfall
In Westline, Pennsylvania, snow does not fall in June through September.Daylight
The average length of the day in September in Westline is 12h and 28min.On the first day of September in Westline, sunrise is at 6:41 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:57 pm EDT.
Sunshine
In Westline, the average sunshine in September is 8h.UV index
In September, the average daily maximum UV index in Westline 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 average individuals.Note: The daily high UV index of 3 during September translates into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What is the temperature in September in Westline?
What is the average humidity in September in Westline?
What is the driest month in Westline?
How many days does it rain in September in Westline?
When it does not snow in Westline?
Does it snow in Westline in September?
What is the average length of the day in September in Westline?
When is the sunrise / sunset in September in Westline?
How long on average sun shines in September in Westline?
What is the UV index reading in September in Westline?
Average temperature in September
Westline, PA
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure in September
Westline, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Westline, PA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Westline, PA
- Average humidity in September: 81%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are May, June and July (79%).
Average rainfall in September
Westline, PA
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is April (4.09").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Westline, PA
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is May (20.7 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in September
Westline, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (13.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Westline, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (23.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Westline, PA
- 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 0min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in September
Westline, PA
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is September (12.1 days).
The month with the least sunshine days is January (4.5 days).
Average UV index in September
Westline, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Westline, PA
- Average cloud cover in September: 46
The month with the most cloud cover is January (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 42).
Average visibility in September
Westline, PA
- Average visibility in September: 4mi
The months with the highest visibility are March, April, May, June, July, October and November (5mi).
The months with the lowest visibility are January, February, August, September and December (4mi).
Westline, Pennsylvania, USA
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