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 subtly correlates with a reduction in the average high-temperature, down from a mild 59.9°F (15.5°C) in August to a fresh 52.5°F (11.4°C). Throughout September, a steady low-temperature average of 41.5°F (5.3°C) is noted.Humidity
The average relative humidity in September is 79%.Rainfall
In Akiachak, during September, the rain falls for 15.5 days and regularly aggregates up to 1.85" (47mm) of precipitation. In Akiachak, during the entire year, the rain falls for 129.5 days and collects up to 16.46" (418mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Akiachak. Throughout September, in the average 0.7 snowfall days, it receives 0.04" (1mm) of snow. In Akiachak, during the entire year, snow falls for 74.8 days and aggregates up to 22.91" (582mm) of snow.Daylight
In Akiachak, the average length of the day in September is 12h and 51min.On the first day of September, sunrise is at 7:40 am and sunset at 9:49 pm. On the last day of the month, sunrise is at 8:52 am and sunset at 8:18 pm AKDT.
Sunshine
In September, the average sunshine is 4.8h.UV index
In September, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.Note: In September, a regular UV index of 2 translates into these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of 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 in Akiachak?
How much does it rain in September?
When does it start to snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Akiachak have in September?
What is the UV index reading in September?
Average temperature in September
Akiachak, AK
- Average high temperature in September: 52.5°F
The warmest month (with the highest average high temperature) is July (62.4°F).
The month with the lowest average high temperature is January (12.2°F).
- Average low temperature in September: 41.5°F
The month with the highest average low temperature is July (49.6°F).
The coldest month (with the lowest average low temperature) is January (3.7°F).
Average pressure in September
Akiachak, AK
- Average pressure in September: 29.72"Hg
The month with the highest atmospheric pressure is July (29.92"Hg).
The month with the lowest atmospheric pressure is December (29.64"Hg).
Average wind speed in September
Akiachak, AK
- Average wind speed in September: 9.9mph
The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity in September
Akiachak, AK
- Average humidity in September: 79%
The months with the highest relative humidity are January, February and March (91%).
The month with the lowest relative humidity is June (65%).
Average rainfall in September
Akiachak, AK
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is August (2.09").
The driest months (with the least rainfall) are January and April (0.91").
Average rainfall days in September
Akiachak, AK
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is August (19.7 days).
The month with the least rainy days is March (4.4 days).
Average snowfall in September
Akiachak, AK
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (4.96").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Akiachak, AK
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is December (12.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Akiachak, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 6min).
The month with the shortest days is December (Average daylight: 5h and 42min).
- Average sunshine in September: 4h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 42min).
Average sunshine days in September
Akiachak, AK
- Average sunshine days in September: 12.3 days
The month with the most sunshine days is March (17.5 days).
The month with the least sunshine days is August (8.6 days).
Average UV index in September
Akiachak, 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, March and December (UV index 1).
Average cloud cover in September
Akiachak, AK
- Average cloud cover in September: 62
The months with the most cloud cover are July and August (Cloud cover 67).
The month with the least cloud cover is June (Cloud cover 54).
Average visibility in September
Akiachak, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September, October and December (6mi).
The months with the lowest visibility are January, February, March, April and November (5mi).
Akiachak, Alaska, USA
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