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 signifies a gentle decline in Twin Rocks's average high-temperature, easing from a warm 78.4°F (25.8°C) in August to a pleasant 72.3°F (22.4°C). Throughout September, the temperature tends to fall to a consistent average low of 52.7°F (11.5°C).Humidity
In September, the average relative humidity in Twin Rocks is 80%.Rainfall
In Twin Rocks, in September, during 13.2 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Twin Rocks, during the entire year, the rain falls for 169.1 days and collects up to 32.6" (828mm) of precipitation.Snowfall
In Twin Rocks, snow does not fall in June through September.Daylight
In September, the average length of the day in Twin Rocks is 12h and 27min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:58 pm EDT.
Sunshine
In Twin Rocks, the average sunshine in September is 8.3h.UV index
In September, the average daily maximum UV index in Twin Rocks is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Twin Rocks in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Twin Rocks?
Does it snow in Twin Rocks in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Twin Rocks have in September?
What is the UV index reading in September?
Average temperature in September
Twin Rocks, PA
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Twin Rocks, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Twin Rocks, PA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Twin Rocks, PA
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and July (78%).
Average rainfall in September
Twin Rocks, PA
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in September
Twin Rocks, PA
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (20.7 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in September
Twin Rocks, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.27").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Twin Rocks, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Twin Rocks, 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 18min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
Twin Rocks, PA
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (14.8 days).
The month with the least sunshine days is January (7.5 days).
Average UV index in September
Twin Rocks, 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
Twin Rocks, PA
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility in September
Twin Rocks, 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).
Twin Rocks, Pennsylvania, USA
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