September weather forecastWindsor Castle, PA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Windsor Castle, Pennsylvania, with an average temperature ranging between max 73.8°F (23.2°C) and min 54.7°F (12.6°C).Temperature
In Windsor Castle, entering September brings a subtle temperature decrement, reducing from August's 80.2°F (26.8°C) to a still moderately hot 73.8°F (23.2°C). In September, Windsor Castle's temperature tends to fall to an average low of 54.7°F (12.6°C) during the night.Humidity
In September, the average relative humidity in Windsor Castle is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.2 days and typically collects 1.61" (41mm) of precipitation.Snowfall
In Windsor Castle, snow does not fall in June through September.Daylight
In Windsor Castle, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:35 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:47 pm EDT.
Sunshine
In Windsor Castle, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Windsor Castle, PA
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Windsor Castle, 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
Windsor Castle, PA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Windsor Castle, PA
- Average humidity in September: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Windsor Castle, PA
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is August (2.87").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
Windsor Castle, PA
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in September
Windsor Castle, PA
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Windsor Castle, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Windsor Castle, PA
- Average daylight in September: 12h and 24min
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 18min).
- Average sunshine in September: 8h and 42min
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 24min).
Average sunshine days in September
Windsor Castle, PA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in September
Windsor Castle, PA
- Average UV index in September: 4
The month with the highest UV index is June (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
Windsor Castle, PA
- Average cloud cover in September: 38
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Windsor Castle, PA
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, June, July and November (6mi).
The months with the lowest visibility are February, May, August, September, October and December (5mi).
