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 brings a slight decrease in the average high-temperature, shifting from a warm 78.6°F (25.9°C) in August to an agreeable 72.3°F (22.4°C). Seneca, during the nights of September, experiences an average temperature drop to a fresh 52.3°F (11.3°C).Humidity
In September, the average relative humidity is 81%.Rainfall
In Seneca, in September, during 15.8 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. In Seneca, during the entire year, the rain falls for 177.7 days and collects up to 35.67" (906mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Seneca, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:45 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:01 pm EDT.
Sunshine
In Seneca, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, the average maximum UV index of 3 translates into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September in Seneca?
When are sunrise and sunset in September?
How many hours of sunshine does Seneca have in September?
How high is the UV index in September?
Average temperature in September
Seneca, 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°F).
- Average low temperature in September: 52.3°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 (17.8°F).
Average pressure in September
Seneca, PA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Seneca, PA
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in September
Seneca, PA
- Average humidity in September: 81%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (78%).
Average rainfall in September
Seneca, PA
- Average rainfall in September: 2.48"
The wettest month (with the highest rainfall) is April (3.9").
The driest month (with the least rainfall) is November (2.36").
Average rainfall days in September
Seneca, PA
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Seneca, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (10.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Seneca, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Seneca, PA
- Average daylight in September: 12h and 3min
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 12min).
- Average sunshine in September: 8h and 1min
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 18min).
Average sunshine days in September
Seneca, 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 February (5.6 days).
Average UV index in September
Seneca, 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
Seneca, PA
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Seneca, PA
- Average visibility in September: 4mi
The months with the highest visibility are March, April, May, June, July, August, October and November (5mi).
The months with the lowest visibility are January, February, September and December (4mi).
Seneca, Pennsylvania, USA
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