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
As September arrives, Alatna's weather displays a decrease in high-temperatures, transitioning from August's mild 60.3°F (15.7°C) to a frosty 47.5°F (8.6°C). In September, the average low-temperature records at an icy 33.1°F (0.6°C) during the nights.Humidity
In September, the average relative humidity in Alatna is 75%.Rainfall
In September, the rain falls for 11.3 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. Throughout the year, in Alatna, there are 76.6 rainfall days, and 9.72" (247mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 3.8 snowfall days, it receives 1.06" (27mm) of snow. Throughout the year, there are 88.7 snowfall days, and 35.59" (904mm) of snow is accumulated.Daylight
The average length of the day in September is 13h and 5min.On the first day of the month, sunrise is at 6:47 am and sunset at 9:33 pm. On the last day of September, sunrise is at 8:22 am and sunset at 7:38 pm AKDT.
Sunshine
In September, the average sunshine in Alatna, Alaska, is 6.7h.UV index
January, March, April, September, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 1 during September translates into the following directions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Opt for tightly woven and loose clothing to enhance protection from the Sun. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What are the temperatures in Alatna in September?
What is the average humidity in September in Alatna?
How many days does it rain in September in Alatna?
When does it start snowing in Alatna?
What is the average length of the day in September in Alatna?
When is the sunrise / sunset in September in Alatna?
How many hours of sunshine does Alatna have in September?
What is the month with the lowest UV index in Alatna?
What is the UV index intensity in September in Alatna?
Average temperature in September
Alatna, AK
- Average high temperature in September: 47.5°F
The warmest month (with the highest average high temperature) is July (68.2°F).
The month with the lowest average high temperature is January (-2.7°F).
- Average low temperature in September: 33.1°F
The month with the highest average low temperature is July (49.3°F).
The coldest month (with the lowest average low temperature) is January (-13.5°F).
Average pressure in September
Alatna, AK
- Average pressure in September: 29.8"Hg
The months with the highest atmospheric pressure are January and February (30.01"Hg).
The month with the lowest atmospheric pressure is September (29.8"Hg).
Average wind speed in September
Alatna, AK
- Average wind speed in September: 4.5mph
The windiest months (with the highest average wind speed) are June and July (5.1mph).
The calmest month (with the lowest average wind speed) is February (4.1mph).
Average humidity in September
Alatna, AK
- Average humidity in September: 75%
The month with the highest relative humidity is April (93%).
The month with the lowest relative humidity is June (52%).
Average rainfall in September
Alatna, AK
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is August (1.5").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Alatna, AK
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is January (1.3 days).
Average snowfall in September
Alatna, AK
- Average snowfall in September: 1.06"
The month with the highest snowfall is December (6.54").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Alatna, AK
- Average snowfall days in September: 3.8 days
The month with the highest number of snowfall days is December (13.4 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Alatna, AK
- Average daylight in September: 13h and 1min
The month with the longest days is May (Average daylight: 19h and 48min).
The month with the shortest days is December (Average daylight: 2h and 36min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is June (Average sunshine: 0h and 36min).
Average sunshine days in September
Alatna, AK
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is January (22.7 days).
The month with the least sunshine days is August (14.2 days).
Average UV index in September
Alatna, AK
- Average UV index in September: 1
The months with the highest UV index are May, June and July (UV index 4).
The months with the lowest UV index are January, March, April, September, November and December (UV index 1).
Average cloud cover in September
Alatna, AK
- Average cloud cover in September: 52
The month with the most cloud cover is April (Cloud cover 58).
The month with the least cloud cover is June (Cloud cover 36).
Average visibility in September
Alatna, AK
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The month with the lowest visibility is April (3mi).
Alatna, Alaska, USA
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