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 refreshing 61.3°F (16.3°C) in August to a cool 52.7°F (11.5°C). In the month of September, Petersville witnesses a consistent average low-temperature of 39.4°F (4.1°C).Humidity
The average relative humidity in September is 76%.Rainfall
The month with the most rainfall is September, when the rain falls for 17 days and typically aggregates up to 2.68" (68mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.31" (8mm) of snow. In Petersville, during the entire year, snow falls for 60.9 days and aggregates up to 36.89" (937mm) of snow.Daylight
In Petersville, the average length of the day in September is 12h and 55min.On the first day of the month, sunrise is at 6:53 am and sunset at 9:11 pm. On the last day of September, sunrise is at 8:10 am and sunset at 7:34 pm AKDT.
Sunshine
In Petersville, the average sunshine in September is 7.5h.UV index
The average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 2 suggests this advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
What is the rainiest month?
How much does it rain in September?
When does it start to snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Petersville, AK
- Average high temperature in September: 52.7°F
The warmest month (with the highest average high temperature) is July (65.5°F).
The month with the lowest average high temperature is January (16.9°F).
- Average low temperature in September: 39.4°F
The month with the highest average low temperature is July (48.4°F).
The coldest month (with the lowest average low temperature) is January (8.8°F).
Average pressure in September
Petersville, AK
- Average pressure in September: 29.75"Hg
The month with the highest atmospheric pressure is July (29.94"Hg).
The month with the lowest atmospheric pressure is December (29.72"Hg).
Average wind speed in September
Petersville, AK
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is January (7mph).
The calmest month (with the lowest average wind speed) is July (4.3mph).
Average humidity in September
Petersville, AK
- Average humidity in September: 76%
The month with the highest relative humidity is March (85%).
The month with the lowest relative humidity is May (64%).
Average rainfall in September
Petersville, AK
- Average rainfall in September: 2.68"
The wettest month (with the highest rainfall) is September (2.68").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Petersville, AK
- Average rainfall days in September: 17 days
The month with the highest number of rainy days is August (20.4 days).
The month with the least rainy days is December (4.8 days).
Average snowfall in September
Petersville, AK
- Average snowfall in September: 0.31"
The month with the highest snowfall is November (7.87").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Petersville, AK
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is December (12.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Petersville, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 48min).
The month with the shortest days is December (Average daylight: 5h and 6min).
- Average sunshine in September: 7h and 3min
The month with the most sunshine is May (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in September
Petersville, AK
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is August (8.3 days).
Average UV index in September
Petersville, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Petersville, AK
- Average cloud cover in September: 45
The month with the most cloud cover is August (Cloud cover 48).
The month with the least cloud cover is January (Cloud cover 38).
Average visibility in September
Petersville, AK
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is April (5mi).
Petersville, Alaska, USA
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