September weather forecastWalston, PA
September
Weather in September
September, the first month of the autumn in Walston, is still a pleasant month, with an average temperature ranging between max 72.3°F (22.4°C) and min 52.5°F (11.4°C).Temperature
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a moderately hot 79.2°F (26.2°C) in August to an agreeable 72.3°F (22.4°C). Throughout the month of September, Walston sees a steady low-temperature average of 52.5°F (11.4°C).Humidity
In Walston, the average relative humidity in September is 79%.Rainfall
In Walston, Pennsylvania, in September, during 12.1 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. In Walston, during the entire year, the rain falls for 151.9 days and collects up to 22.13" (562mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Walston, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:43 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:59 pm EDT.
Sunshine
In Walston, Pennsylvania, the average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Walston, PA
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Walston, 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 (29.95"Hg).
Average wind speed in September
Walston, 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
Walston, PA
- Average humidity in September: 79%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June, July and August (78%).
Average rainfall in September
Walston, PA
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is April (2.48").
The driest month (with the least rainfall) is November (1.26").
Average rainfall days in September
Walston, PA
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Walston, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Walston, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Walston, PA
- Average daylight in September: 12h and 30min
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 12min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Walston, PA
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is September (15.3 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in September
Walston, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Walston, PA
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in September
Walston, PA
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
