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 aligns with a minor decrease in average high-temperatures, from August's cool 54°F (12.2°C) to a frosty 47.3°F (8.5°C). Night temperatures during September in White Mountain stabilize at an average of 42.1°F (5.6°C), closely mirroring the daytime temperatures.Humidity
In White Mountain, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 11.5 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. In White Mountain, during the entire year, the rain falls for 81.6 days and collects up to 16.77" (426mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 65.1 snowfall days, and 25" (635mm) of snow is accumulated.Daylight
In White Mountain, the average length of the day in September is 12h and 59min.On the first day of the month, sunrise is at 7:37 am and sunset at 10:09 pm. On the last day of September, sunrise is at 9:03 am and sunset at 8:23 pm AKDT.
Sunshine
In White Mountain, the average sunshine in September is 5.8h.UV index
In September, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 2 in September, converts into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in White Mountain in September?
When does it start snowing?
How many hours of daylight does White Mountain have in September?
When are sunrise and sunset in September?
How many hours of sunshine does White Mountain have in September?
What is the UV index intensity in September?
Average temperature in September
White Mountain, AK
- Average high temperature in September: 47.3°F
The warmest month (with the highest average high temperature) is July (54.3°F).
The month with the lowest average high temperature is January (10.4°F).
- Average low temperature in September: 42.1°F
The months with the highest average low temperature are July and August (48.7°F).
The coldest month (with the lowest average low temperature) is January (2.7°F).
Average pressure in September
White Mountain, AK
- Average pressure in September: 29.75"Hg
The month with the highest atmospheric pressure is May (29.94"Hg).
The month with the lowest atmospheric pressure is October (29.7"Hg).
Average wind speed in September
White Mountain, AK
- Average wind speed in September: 11.1mph
The windiest month (with the highest average wind speed) is November (13.2mph).
The calmest month (with the lowest average wind speed) is May (8mph).
Average humidity in September
White Mountain, AK
- Average humidity in September: 78%
The months with the highest relative humidity are February and March (89%).
The month with the lowest relative humidity is June (76%).
Average rainfall in September
White Mountain, AK
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is August (2.2").
The driest month (with the least rainfall) is May (0.71").
Average rainfall days in September
White Mountain, AK
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is August (15.9 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
White Mountain, AK
- Average snowfall in September: 0.12"
The month with the highest snowfall is March (5.08").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
White Mountain, AK
- Average snowfall days in September: 1 days
The month with the highest number of snowfall days is December (11.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
White Mountain, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 18min).
The month with the shortest days is December (Average daylight: 4h and 6min).
- Average sunshine in September: 5h and 5min
The month with the most sunshine is May (Average sunshine: 7h and 12min).
The month with the least sunshine is June (Average sunshine: 0h and 36min).
Average sunshine days in September
White Mountain, AK
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is March (20.8 days).
The month with the least sunshine days is August (13.6 days).
Average UV index in September
White Mountain, AK
- Average UV index in September: 2
The months with the highest UV index are May, June, July and August (UV index 3).
The months with the lowest UV index are January, October, November and December (UV index 1).
Average cloud cover in September
White Mountain, AK
- Average cloud cover in September: 54
The month with the most cloud cover is July (Cloud cover 60).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in September
White Mountain, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, April and December (5mi).
White Mountain, Alaska, USA
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