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
In Twin Hills, the average high-temperature in September gently drops from a refreshing 57.7°F (14.3°C) in August to a cool 52°F (11.1°C). Twin Hills reports an average low-temperature of 42.4°F (5.8°C) during the nights of September.Humidity
In Twin Hills, the average relative humidity in September is 81%.Rainfall
In Twin Hills, in September, during 16.5 rainfall days, 3.31" (84mm) of precipitation is typically accumulated. In Twin Hills, during the entire year, the rain falls for 144.9 days and collects up to 29.13" (740mm) of precipitation.Snowfall
In Twin Hills, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 47min.On the first day of September, sunrise is at 7:40 am and sunset at 9:40 pm. On the last day of the month, sunrise is at 8:46 am and sunset at 8:15 pm AKDT.
Sunshine
The average sunshine in September is 5.2h.UV index
The average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 2 during September leads to these instructions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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 September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Twin Hills have in September?
How high is the UV index in September?
Average temperature in September
Twin Hills, AK
- Average high temperature in September: 52°F
The warmest month (with the highest average high temperature) is July (58.5°F).
The month with the lowest average high temperature is January (19.6°F).
- Average low temperature in September: 42.4°F
The months with the highest average low temperature are July and August (47.8°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in September
Twin Hills, AK
- Average pressure in September: 29.72"Hg
The month with the highest atmospheric pressure is July (29.95"Hg).
The month with the lowest atmospheric pressure is December (29.59"Hg).
Average wind speed in September
Twin Hills, AK
- Average wind speed in September: 9.9mph
The windiest month (with the highest average wind speed) is October (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in September
Twin Hills, AK
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are May and June (73%).
Average rainfall in September
Twin Hills, AK
- Average rainfall in September: 3.31"
The wettest month (with the highest rainfall) is October (3.98").
The driest month (with the least rainfall) is June (1.5").
Average rainfall days in September
Twin Hills, AK
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is August (18.3 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in September
Twin Hills, AK
- Average snowfall in September: 0"
The month with the highest snowfall is February (8.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Twin Hills, AK
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (13.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Twin Hills, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 24min).
The month with the shortest days is December (Average daylight: 6h and 18min).
- Average sunshine in September: 5h and 1min
The month with the most sunshine is June (Average sunshine: 8h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 36min).
Average sunshine days in September
Twin Hills, AK
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is March (15.5 days).
The month with the least sunshine days is August (11.3 days).
Average UV index in September
Twin Hills, 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 February, November and December (UV index 1).
Average cloud cover in September
Twin Hills, AK
- Average cloud cover in September: 58
The month with the most cloud cover is August (Cloud cover 64).
The months with the least cloud cover are January and June (Cloud cover 53).
Average visibility in September
Twin Hills, AK
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Twin Hills, Alaska, USA
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