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 is characterized by a mild reduction in the average high-temperature, from a moderately hot 84.4°F (29.1°C) in August to a still warm 77.9°F (25.5°C). In Allentown, the average temperature during the nights of September drops to a refreshing 56.7°F (13.7°C).Humidity
In Allentown, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.2 days and typically collects 2.05" (52mm) of precipitation.Snowfall
June through September are months without snowfall in Allentown.Daylight
In Allentown, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:55 pm. On the last day of September, in Allentown, West Virginia, sunrise is at 7:21 am and sunset at 7:09 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Allentown, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Allentown in September?
What is the average humidity in September in Allentown?
What is the driest month in Allentown?
How much does it rain in Allentown in September?
When it does not snow in Allentown?
Does it snow in Allentown in September?
How many hours of daylight does Allentown have in September?
When is the sunrise / sunset in September in Allentown?
How long on average sun shines in September in Allentown?
What is the UV index reading in September in Allentown?
Average temperature in September
Allentown, WV
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Allentown, WV
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Allentown, WV
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is February (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Allentown, WV
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are June and August (76%).
Average rainfall in September
Allentown, WV
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in September
Allentown, WV
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is November (11.5 days).
Average snowfall in September
Allentown, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Allentown, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Allentown, WV
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Allentown, WV
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is May (7.9 days).
Average UV index in September
Allentown, WV
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Allentown, WV
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Allentown, WV
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is January (4mi).
Allentown, West Virginia, USA
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