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 brings a minor shift in the average high-temperature, adjusting from a fresh 54°F (12.2°C) in August to a frosty 47.3°F (8.5°C). An average low-temperature of 42.1°F (5.6°C) is witnessed throughout the month of September, a mere drop from the daytime peak.Humidity
In September, the average relative humidity is 78%.Rainfall
In White Mountain, Alaska, during September, the rain falls for 11.5 days and regularly aggregates up to 1.65" (42mm) of precipitation. 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 September, the average sunshine is 5.8h.UV index
The average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 2 in September translates into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
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 many days does it rain in September?
When does it start snowing?
What is the average length of the day in September in White Mountain?
What time 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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