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 shift from August to September involves a decrease in the average high-temperature, from a moderate 57.6°F (14.2°C) to a frosty 47.1°F (8.4°C). Usibelli experiences a steady low-temperature of 34°F (1.1°C) throughout September.Humidity
In September, the average relative humidity is 80%.Rainfall
In Usibelli, during September, the rain falls for 12.7 days and regularly aggregates up to 1.3" (33mm) of precipitation. Throughout the year, there are 106.3 rainfall days, and 14.49" (368mm) of precipitation is accumulated.Snowfall
January through May, August through December are months with snowfall. In Usibelli, in September, snow falls for 2.8 days, with typically accumulated 1.73" (44mm) of snow. Throughout the year, there are 93.4 snowfall days, and 35.94" (913mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 58min.On the first day of September, sunrise is at 6:41 am and sunset at 9:08 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 7:25 pm AKDT.
Sunshine
In Usibelli, the average sunshine in September is 7.4h.UV index
In Usibelli, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in September interprets into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
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 in Usibelli?
How much does it rain in September?
How much does it snow in September?
How many hours of daylight does Usibelli have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Usibelli, AK
- Average high temperature in September: 47.1°F
The warmest month (with the highest average high temperature) is July (62.8°F).
The month with the lowest average high temperature is January (4.6°F).
- Average low temperature in September: 34°F
The month with the highest average low temperature is July (45.3°F).
The coldest month (with the lowest average low temperature) is January (-6.3°F).
Average pressure in September
Usibelli, AK
- Average pressure in September: 29.76"Hg
The month with the highest atmospheric pressure is February (29.93"Hg).
The month with the lowest atmospheric pressure is September (29.76"Hg).
Average wind speed in September
Usibelli, AK
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is May (5.5mph).
The calmest months (with the lowest average wind speed) are March and November (4.6mph).
Average humidity in September
Usibelli, AK
- Average humidity in September: 80%
The month with the highest relative humidity is March (93%).
The month with the lowest relative humidity is June (64%).
Average rainfall in September
Usibelli, AK
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Usibelli, AK
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is June (19.6 days).
The months with the least rainy days are February and December (1.5 days).
Average snowfall in September
Usibelli, AK
- Average snowfall in September: 1.73"
The month with the highest snowfall is March (6.89").
The months with the least snowfall are June and July (0").
Average snowfall days in September
Usibelli, AK
- Average snowfall days in September: 2.8 days
The month with the highest number of snowfall days is March (17.4 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Usibelli, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 42min).
The month with the shortest days is December (Average daylight: 4h and 30min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 3h and 18min).
Average sunshine days in September
Usibelli, AK
- Average sunshine days in September: 13 days
The month with the most sunshine days is January (21.2 days).
The month with the least sunshine days is June (8.5 days).
Average UV index in September
Usibelli, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Usibelli, AK
- Average cloud cover in September: 49
The month with the most cloud cover is March (Cloud cover 61).
The month with the least cloud cover is May (Cloud cover 42).
Average visibility in September
Usibelli, AK
- Average visibility in September: 5mi
The months with the highest visibility are May, June and July (6mi).
The months with the lowest visibility are January and March (3mi).
Usibelli, Alaska, USA
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