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's arrival comes with a decrease in the average high-temperature, moving from a warm 83.7°F (28.7°C) in August to an agreeable 72.9°F (22.7°C). In September, the recorded average low-temperature, of 50.7°F (10.4°C), exhibits a significant fall from the daytime highs.Humidity
The average relative humidity in September is 48%.Rainfall
In Airway Heights, in September, during 7.5 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Airway Heights, during the entire year, the rain falls for 127.8 days and collects up to 16.93" (430mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Airway Heights, Washington. Throughout September, in the average 0.2 snowfall days, it receives 0.47" (12mm) of snow. Throughout the year, there are 62.3 snowfall days, and 37.83" (961mm) of snow is accumulated.Daylight
In Airway Heights, the average length of the day in September is 12h and 33min.On the first day of September in Airway Heights, sunrise is at 6:10 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:30 pm PDT.
Sunshine
The average sunshine in September is 10.2h.UV index
The average daily maximum UV index in September in Airway Heights is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 4 in September translates into this advice:
Take necessary precautions - Defending against sun damage is advocated. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
What is the temperature in September in Airway Heights?
What is the average humidity in September in Airway Heights?
How much does it rain in Airway Heights in September?
When does it start snowing in Airway Heights?
How many hours of daylight does Airway Heights have in September?
When is the sunrise / sunset in September in Airway Heights?
How long on average sun shines in September in Airway Heights?
What is the UV index reading in September in Airway Heights?
Average temperature in September
Airway Heights, WA
- Average high temperature in September: 72.9°F
The warmest months (with the highest average high temperature) are July and August (83.7°F).
The month with the lowest average high temperature is December (32.2°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is August (59°F).
The coldest month (with the lowest average low temperature) is December (22.1°F).
Average pressure in September
Airway Heights, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in September
Airway Heights, WA
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Airway Heights, WA
- Average humidity in September: 48%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Airway Heights, WA
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is March (2.13").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in September
Airway Heights, WA
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is April (16.3 days).
The month with the least rainy days is July (4.9 days).
Average snowfall in September
Airway Heights, WA
- Average snowfall in September: 0.47"
The month with the highest snowfall is January (10.39").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Airway Heights, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (15.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Airway Heights, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in September
Airway Heights, WA
- Average sunshine days in September: 20.3 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is March (9.8 days).
Average UV index in September
Airway Heights, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Airway Heights, WA
- Average cloud cover in September: 20
The months with the most cloud cover are January and December (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in September
Airway Heights, WA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
Airway Heights, Washington, USA
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