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
With the onset of September, the average high-temperature registers at a fresh 55.2°F (12.9°C), subtly different from August's 57.6°F (14.2°C). Nighttime, during September, brings an average low of 52°F (11.1°C), a modest reduction from the day's peak.Humidity
The average relative humidity in September is 84%.Rainfall
In September, the rain falls for 19.4 days. Throughout September, 6.97" (177mm) of precipitation is accumulated. Throughout the year, there are 223.5 rainfall days, and 72.17" (1833mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Rowan Bay, Alaska.Daylight
In Rowan Bay, the average length of the day in September is 12h and 44min.On the first day of the month, sunrise is at 6:01 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:33 pm AKDT.
Sunshine
In September, the average sunshine is 6.7h.UV index
The average daily maximum UV index in September in Rowan Bay is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September in Rowan Bay?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When 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
Rowan Bay, AK
- Average high temperature in September: 55.2°F
The warmest month (with the highest average high temperature) is August (57.6°F).
The month with the lowest average high temperature is February (39.6°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is February (35.4°F).
Average pressure in September
Rowan Bay, AK
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.72"Hg).
Average wind speed in September
Rowan Bay, AK
- Average wind speed in September: 11.8mph
The windiest month (with the highest average wind speed) is January (17mph).
The calmest months (with the lowest average wind speed) are June and July (8.9mph).
Average humidity in September
Rowan Bay, AK
- Average humidity in September: 84%
The month with the highest relative humidity is August (89%).
The months with the lowest relative humidity are February and March (78%).
Average rainfall in September
Rowan Bay, AK
- Average rainfall in September: 6.97"
The wettest month (with the highest rainfall) is November (9.69").
The driest month (with the least rainfall) is May (3.07").
Average rainfall days in September
Rowan Bay, AK
- Average rainfall days in September: 19.4 days
The month with the highest number of rainy days is November (23.1 days).
The month with the least rainy days is February (14.2 days).
Average snowfall in September
Rowan Bay, AK
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.88").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Rowan Bay, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (8.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rowan Bay, AK
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is May (Average sunshine: 7h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Rowan Bay, AK
- Average sunshine days in September: 9.4 days
The month with the most sunshine days is May (13.6 days).
The month with the least sunshine days is November (5.3 days).
Average UV index in September
Rowan Bay, AK
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Rowan Bay, AK
- Average cloud cover in September: 55
The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are May and September (Cloud cover 55).
Average visibility in September
Rowan Bay, AK
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Rowan Bay, Alaska, USA
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