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 shows a mild decline in the average high-temperature, falling from August's refreshing 56.1°F (13.4°C) to a chilly 46.9°F (8.3°C). A consistent average low-temperature of 39.4°F (4.1°C), with a minor variance from the daytime highs, is noted during the nights of September.Humidity
The average relative humidity in September is 77%.Rainfall
In September, the rain falls for 10 days. Throughout September, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 74.6 rainfall days, and 6.69" (170mm) 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 2.7 snowfall days, it receives 0.51" (13mm) of snow. Throughout the year, there are 85.7 snowfall days, and 15.79" (401mm) of snow is accumulated.Daylight
In September, the average length of the day is 13h and 3min.On the first day of the month, sunrise is at 7:26 am and sunset at 10:08 pm. On the last day of September, sunrise is at 8:58 am and sunset at 8:15 pm AKDT.
Sunshine
In September, the average sunshine is 6.2h.UV index
In Kiwalik, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 2 in September converts into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. 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 is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
How many hours of daylight does Kiwalik have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Kiwalik, AK
- Average high temperature in September: 46.9°F
The warmest month (with the highest average high temperature) is July (59.2°F).
The month with the lowest average high temperature is January (6.8°F).
- Average low temperature in September: 39.4°F
The month with the highest average low temperature is July (47.7°F).
The coldest month (with the lowest average low temperature) is January (-1.7°F).
Average pressure in September
Kiwalik, AK
- Average pressure in September: 29.76"Hg
The month with the highest atmospheric pressure is May (29.95"Hg).
The month with the lowest atmospheric pressure is October (29.75"Hg).
Average wind speed in September
Kiwalik, AK
- Average wind speed in September: 10.4mph
The windiest month (with the highest average wind speed) is October (11.1mph).
The calmest month (with the lowest average wind speed) is May (8.1mph).
Average humidity in September
Kiwalik, AK
- Average humidity in September: 77%
The months with the highest relative humidity are January and March (92%).
The month with the lowest relative humidity is June (69%).
Average rainfall in September
Kiwalik, AK
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is July (1.1").
The driest months (with the least rainfall) are January, May and June (0.31").
Average rainfall days in September
Kiwalik, AK
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is August (13.8 days).
The month with the least rainy days is December (1.5 days).
Average snowfall in September
Kiwalik, AK
- Average snowfall in September: 0.51"
The months with the highest snowfall are February and March (3.03").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Kiwalik, AK
- Average snowfall days in September: 2.7 days
The month with the highest number of snowfall days is March (14.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Kiwalik, AK
- Average daylight in September: 13h and 1min
The month with the longest days is July (Average daylight: 20h and 54min).
The month with the shortest days is December (Average daylight: 3h and 6min).
- Average sunshine in September: 6h and 1min
The month with the most sunshine is August (Average sunshine: 7h and 36min).
The month with the least sunshine is June (Average sunshine: 0h and 36min).
Average sunshine days in September
Kiwalik, AK
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is February (12.9 days).
Average UV index in September
Kiwalik, AK
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are March, April, November and December (UV index 1).
Average cloud cover in September
Kiwalik, AK
- Average cloud cover in September: 53
The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is June (Cloud cover 42).
Average visibility in September
Kiwalik, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Kiwalik, Alaska, USA
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