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
The move into September indicates a slight reduction in the average high-temperature, down from August's 81°F (27.2°C) to a still moderately hot 74.8°F (23.8°C). During September, the average low-temperature in West Willow is a mild 56.5°F (13.6°C).Humidity
In September, the average relative humidity in West Willow is 80%.Rainfall
The months with the least rainfall are February and September Rain falls for 12.2 days and accumulates 1.89" (48mm) of rain.Snowfall
May through October are months without snowfall.Daylight
In West Willow, Pennsylvania, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:48 pm EDT.
Sunshine
In West Willow, the average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index in West Willow is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Take precautions - Protection against sun damage is advised. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What is the temperature in September in West Willow?
What is the average humidity in September in West Willow?
What is the driest month in West Willow?
How much does it rain in West Willow in September?
When it does not snow in West Willow?
What is the average length of the day in September in West Willow?
When is the sunrise / sunset in September in West Willow?
How long on average sun shines in September in West Willow?
What is the UV index intensity in September in West Willow?
Average temperature in September
West Willow, PA
- Average high temperature in September: 74.8°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in September
West Willow, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
West Willow, PA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
West Willow, PA
- Average humidity in September: 80%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
West Willow, PA
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is August (3.35").
The driest months (with the least rainfall) are February and September (1.89").
Average rainfall days in September
West Willow, PA
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (8 days).
Average snowfall in September
West Willow, PA
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.66").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
West Willow, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 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 Willow, PA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
West Willow, PA
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in September
West Willow, PA
- Average UV index in September: 4
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
West Willow, PA
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
West Willow, PA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
West Willow, Pennsylvania, USA
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