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 Knik, the average high-temperature in September slightly decreases from a comfortable 61.5°F (16.4°C) in August to a fresh 53.4°F (11.9°C). Throughout September nights, Knik registers an average low-temperature of 42.1°F (5.6°C).Humidity
In September, the average relative humidity is 77%.Rainfall
The month with the most rainfall is September, when the rain falls for 15.1 days and typically aggregates up to 1.77" (45mm) of precipitation.Snowfall
Months with snowfall in Knik are January through May, September through December. September is the first month it typically snows in Knik. Throughout September, in the average 0.3 snowfall days, it receives 0.16" (4mm) of snow. In Knik, during the entire year, snow falls for 56.8 days and aggregates up to 22.48" (571mm) of snow.Daylight
The average length of the day in September in Knik is 12h and 52min.On the first day of the month, sunrise is at 6:52 am and sunset at 9:04 pm. On the last day of September, sunrise is at 8:05 am and sunset at 7:31 pm AKDT.
Sunshine
In Knik, Alaska, the average sunshine in September is 7.8h.UV index
The average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 2 during September leads to these instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
What is the temperature in September in Knik?
What is the average humidity in September in Knik?
What is the rainiest month in Knik?
How much does it rain in Knik in September?
When does it start to snow in Knik?
How many hours of daylight does Knik have in September?
When is the sunrise / sunset in September in Knik?
How long on average sun shines in September in Knik?
How high is the UV index in September in Knik?
Average temperature in September
Knik, AK
- Average high temperature in September: 53.4°F
The warmest month (with the highest average high temperature) is July (64.8°F).
The month with the lowest average high temperature is January (19.2°F).
- Average low temperature in September: 42.1°F
The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in September
Knik, AK
- Average pressure in September: 29.75"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.68"Hg).
Average wind speed in September
Knik, AK
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is November (4.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in September
Knik, AK
- Average humidity in September: 77%
The month with the highest relative humidity is March (88%).
The month with the lowest relative humidity is May (64%).
Average rainfall in September
Knik, AK
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is September (1.77").
The driest months (with the least rainfall) are April and May (0.59").
Average rainfall days in September
Knik, AK
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is August (17.4 days).
The month with the least rainy days is February (7.4 days).
Average snowfall in September
Knik, AK
- Average snowfall in September: 0.16"
The month with the highest snowfall is December (5.67").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Knik, AK
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (11.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Knik, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 18min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is May (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in September
Knik, AK
- Average sunshine days in September: 12.2 days
The month with the most sunshine days is January (17 days).
The month with the least sunshine days is August (11.6 days).
Average UV index in September
Knik, AK
- Average UV index in September: 2
The months with the highest UV index are May, June and July (UV index 4).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Knik, AK
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is May (Cloud cover 38).
Average visibility in September
Knik, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, April and December (5mi).
Knik, Alaska, USA
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