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
As Clarendon enters September, the average high-temperature subtly lowers from the a moderately hot 76.5°F (24.7°C) of August to a pleasant 70.3°F (21.3°C). September in Clarendon sees the temperature falling to a mean low of 50.7°F (10.4°C).Humidity
In September, the average relative humidity is 82%.Rainfall
September is the month with the least rainfall. Rain falls for 14.7 days and accumulates 1.77" (45mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Clarendon is 12h and 28min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:12 am and sunset at 6:59 pm EDT.
Sunshine
In Clarendon, the average sunshine in September is 8h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What are September temperatures in Clarendon?
What is the average humidity in September in Clarendon?
What is the driest month in Clarendon?
How many days does it rain in September in Clarendon?
When it does not snow in Clarendon?
Does it snow in Clarendon in September?
What is the average length of the day in September in Clarendon?
When is the sunrise / sunset in September in Clarendon?
How many hours of sunshine does Clarendon have in September?
How high is the UV index in September in Clarendon?
Average temperature in September
Clarendon, PA
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in September
Clarendon, PA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Clarendon, PA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Clarendon, PA
- Average humidity in September: 82%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (80%).
Average rainfall in September
Clarendon, PA
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is April (2.99").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Clarendon, PA
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in September
Clarendon, PA
- Average snowfall in September: 0"
The month with the highest snowfall is December (9.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Clarendon, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (22.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Clarendon, 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 0min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 6min).
Average sunshine days in September
Clarendon, PA
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is September (12.5 days).
The month with the least sunshine days is January (4.3 days).
Average UV index in September
Clarendon, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Clarendon, PA
- Average cloud cover in September: 45
The month with the most cloud cover is January (Cloud cover 80).
The months with the least cloud cover are July and August (Cloud cover 41).
Average visibility in September
Clarendon, PA
- Average visibility in September: 4mi
The months with the highest visibility are March, April, May, June, July, October and November (5mi).
The months with the lowest visibility are January, February, August, September and December (4mi).
Clarendon, Pennsylvania, USA
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