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 transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a mild 59.7°F (15.4°C) in August to a fresh 53.1°F (11.7°C). Nighttime, during September, brings an average low of 45.7°F (7.6°C), a modest reduction from the day's peak.Humidity
The average relative humidity in September is 80%.Rainfall
In Nikiski, Alaska, in September, during 16.6 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. In Nikiski, during the entire year, the rain falls for 136.3 days and collects up to 19.49" (495mm) of precipitation.Snowfall
January through April, September through December are months with snowfall. September is the first month it typically snows in Nikiski. Throughout September, in the average 0.3 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in Nikiski, there are 62.1 snowfall days, and 30.71" (780mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 50min.On the first day of the month, sunrise is at 7:00 am and sunset at 9:08 pm. On the last day of September, sunrise is at 8:11 am and sunset at 7:38 pm AKDT.
Sunshine
In Nikiski, the average sunshine in September is 6.2h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The average daily UV index of 3 in September transforms into the following instructions:
Be vigilant - Preventing sunburn is recommended. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What are the temperatures in Nikiski in September?
What is the average humidity in September in Nikiski?
How much does it rain in Nikiski in September?
When does it start to snow in Nikiski?
How many hours of daylight does Nikiski have in September?
When is the sunrise / sunset in September in Nikiski?
How many hours of sunshine does Nikiski have in September?
How high is the UV index in September in Nikiski?
Average temperature in September
Nikiski, AK
- Average high temperature in September: 53.1°F
The warmest month (with the highest average high temperature) is July (61.3°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in September: 45.7°F
The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Nikiski, AK
- Average pressure in September: 29.73"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The month with the lowest atmospheric pressure is December (29.64"Hg).
Average wind speed in September
Nikiski, AK
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is December (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Nikiski, AK
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (69%).
Average rainfall in September
Nikiski, AK
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is October (2.87").
The driest month (with the least rainfall) is June (0.91").
Average rainfall days in September
Nikiski, AK
- Average rainfall days in September: 16.6 days
The month with the highest number of rainy days is September (16.6 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Nikiski, AK
- Average snowfall in September: 0.2"
The month with the highest snowfall is December (8.74").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
Nikiski, AK
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (12.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Nikiski, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 0min).
The month with the shortest days is December (Average daylight: 5h and 48min).
- Average sunshine in September: 6h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).
Average sunshine days in September
Nikiski, AK
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is June (16.6 days).
The month with the least sunshine days is September (11.5 days).
Average UV index in September
Nikiski, AK
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Nikiski, AK
- Average cloud cover in September: 51
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is June (Cloud cover 44).
Average visibility in September
Nikiski, AK
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Nikiski, Alaska, USA
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