September weather forecastPort Safety, AK
September
Weather in September
The first month of the autumn, September, is still a chilly month in Port Safety, Alaska, with an average temperature varying between 47.3°F (8.5°C) and 42.1°F (5.6°C).Temperature
September's arrival subtly correlates with a reduction in the average high-temperature, down from a fresh 54°F (12.2°C) in August to a frosty 47.3°F (8.5°C). Port Safety upholds a consistent average temperature of 42.1°F (5.6°C) throughout the nights of September.Humidity
The average relative humidity in September is 78%.Rainfall
In Port Safety, in September, it is raining for 11.5 days, with typically 1.65" (42mm) of accumulated precipitation. In Port Safety, during the entire year, the rain falls for 81.6 days and collects up to 16.77" (426mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 1 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 65.1 snowfall days, and 25" (635mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 59min.On the first day of the month, sunrise is at 7:43 am and sunset at 10:14 pm. On the last day of September, sunrise is at 9:08 am and sunset at 8:29 pm AKDT.
Sunshine
In September, the average sunshine is 5.8h.UV index
The average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 2 translates into these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Port Safety, AK
- Average high temperature in September: 47.3°F
The warmest month (with the highest average high temperature) is July (54.3°F).
The month with the lowest average high temperature is January (10.4°F).
- Average low temperature in September: 42.1°F
The months with the highest average low temperature are July and August (48.7°F).
The coldest month (with the lowest average low temperature) is January (2.7°F).
Average pressure in September
Port Safety, AK
- Average pressure in September: 29.75"Hg
The month with the highest atmospheric pressure is May (29.94"Hg).
The month with the lowest atmospheric pressure is October (29.7"Hg).
Average wind speed in September
Port Safety, AK
- Average wind speed in September: 11.1mph
The windiest month (with the highest average wind speed) is November (13.2mph).
The calmest month (with the lowest average wind speed) is May (8mph).
Average humidity in September
Port Safety, AK
- Average humidity in September: 78%
The months with the highest relative humidity are February and March (89%).
The month with the lowest relative humidity is June (76%).
Average rainfall in September
Port Safety, AK
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is August (2.2").
The driest month (with the least rainfall) is May (0.71").
Average rainfall days in September
Port Safety, AK
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is August (15.9 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
Port Safety, AK
- Average snowfall in September: 0.12"
The month with the highest snowfall is March (5.08").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Port Safety, AK
- Average snowfall days in September: 1 days
The month with the highest number of snowfall days is December (11.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Port Safety, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 6min).
The month with the shortest days is December (Average daylight: 4h and 12min).
- Average sunshine in September: 5h and 48min
The month with the most sunshine is May (Average sunshine: 7h and 12min).
The month with the least sunshine is June (Average sunshine: 0h and 36min).
Average sunshine days in September
Port Safety, AK
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is March (20.8 days).
The month with the least sunshine days is August (13.6 days).
Average UV index in September
Port Safety, 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 January, October, November and December (UV index 1).
Average cloud cover in September
Port Safety, AK
- Average cloud cover in September: 54
The month with the most cloud cover is July (Cloud cover 60).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in September
Port Safety, 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).
