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 moderately hot 80.1°F (26.7°C) in August to an agreeable 72.7°F (22.6°C). An average low-temperature of 53.1°F (11.7°C) is expected during September.Humidity
In Arlington Heights, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.81" (46mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:44 pm EDT.
Sunshine
The average sunshine in September in Arlington Heights is 8.5h.UV index
In Arlington Heights, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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?
How many hours of daylight does Arlington Heights have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Arlington Heights have in September?
What is the UV index reading in September?
Average temperature in September
Arlington Heights, PA
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 53.1°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in September
Arlington Heights, 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 (29.94"Hg).
Average wind speed in September
Arlington Heights, PA
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are January and March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Arlington Heights, PA
- Average humidity in September: 79%
The months with the highest relative humidity are February, October and December (82%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in September
Arlington Heights, PA
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Arlington Heights, PA
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in September
Arlington Heights, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Arlington Heights, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (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
Arlington Heights, 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 18min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Arlington Heights, PA
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is April (11.1 days).
Average UV index in September
Arlington Heights, PA
- Average UV index in September: 4
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
Arlington Heights, PA
- Average cloud cover in September: 42
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Arlington Heights, 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).
Arlington Heights, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location