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 transition into September involves a small decrease in the average high-temperature, dipping slightly from a warm 78.6°F (25.9°C) in August to an agreeable 71.8°F (22.1°C). During September, Damascus records an average temperature of 51.3°F (10.7°C) at night.Humidity
In September, the average relative humidity is 80%.Rainfall
January and September are months with the least rain when the rain falls for 9.4 days and typically aggregates up to 1.14" (29mm) of rain.Snowfall
In Damascus, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:43 pm EDT.
Sunshine
In September, the average sunshine in Damascus is 8.6h.UV index
The average daily maximum UV index in September in Damascus is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 3 in September translates into these instructions:
Take necessary precautions - Suggestions to elude sunburn are provided. To protect against the Sun's most potent rays, avoid direct exposure around midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
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?
What is the driest month?
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?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Damascus, PA
- Average high temperature in September: 71.8°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
Damascus, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Damascus, PA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is February (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Damascus, PA
- Average humidity in September: 80%
The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is July (77%).
Average rainfall in September
Damascus, PA
- Average rainfall in September: 1.14"
The wettest months (with the highest rainfall) are July and August (2.09").
The driest months (with the least rainfall) are January and September (1.14").
Average rainfall days in September
Damascus, PA
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is May (15.6 days).
The months with the least rainy days are January and February (6.9 days).
Average snowfall in September
Damascus, PA
- Average snowfall in September: 0"
The months with the highest snowfall are January and December (3.27").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Damascus, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Damascus, PA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Damascus, PA
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (12.5 days).
Average UV index in September
Damascus, 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
Damascus, PA
- Average cloud cover in September: 43
The months with the most cloud cover are February and December (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in September
Damascus, PA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Damascus, Pennsylvania, USA
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