September weather forecastBarrow, AK
September
Weather in September
September sees the onset of the fall season in Barrow, with temperatures receding down to 37.9°F (3.3°C). The landscape gradually shifts from dense green to crisp autumn hues. The amount of sunshine reduces as the city prepares for the approaching winter. The days become noticeably shorter, and the precipitation transitions from rain to sporadic snowfall.Temperature
As Barrow welcomes September, the average high-temperature is noted at a still icy 37.9°F (3.3°C), closely aligning with the preceding month. September nights document an average temperature reading of 34°F (1.1°C).Humidity
The average relative humidity in September is 84%.Rainfall
In September, the rain falls for 9.2 days. Throughout September, 0.83" (21mm) of precipitation is accumulated. Throughout the year, there are 58.5 rainfall days, and 6.81" (173mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through December. In September, it is snowing for 10.5 days. Throughout September, 1.46" (37mm) of snow is accumulated. Throughout the year, there are 125.6 snowfall days, and 17.13" (435mm) of snow is accumulated.Ocean temperature
August and September, with an average ocean temperature of 35.6°F (2°C), are months with the warmest seawater.Note: In the scenario of swimming, this is assessed as life-threatening and highly risky. The chilling water causes severe discomfort and induces instant hyperventilation. A specialized swimsuit is necessary to counter thermal damage.
Daylight
In September, the average length of the day is 13h and 23min.On the first day of the month, sunrise is at 6:39 am and sunset at 10:14 pm. On the last day of September, sunrise is at 8:44 am and sunset at 7:48 pm AKDT.
Sunshine
The average sunshine in September is 3.6h.UV index
April, June, July and September, with an average maximum UV index of 2, are months with the highest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily maximum UV index of 2 in September interprets into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Boost your sun resistance with garments that are densely woven yet spacious. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Barrow, AK
- Average high temperature in September: 37.9°F
The warmest month (with the highest average high temperature) is July (43.3°F).
The month with the lowest average high temperature is January (-3.3°F).
- Average low temperature in September: 34°F
The month with the highest average low temperature is July (37°F).
The coldest month (with the lowest average low temperature) is January (-11.2°F).
Average pressure in September
Barrow, AK
- Average pressure in September: 29.85"Hg
The months with the highest atmospheric pressure are January and March (30.09"Hg).
The month with the lowest atmospheric pressure is September (29.85"Hg).
Average wind speed in September
Barrow, AK
- Average wind speed in September: 13mph
The windiest month (with the highest average wind speed) is October (15.3mph).
The calmest month (with the lowest average wind speed) is May (10.6mph).
Average humidity in September
Barrow, AK
- Average humidity in September: 84%
The months with the highest relative humidity are January, February, March and December (95%).
The month with the lowest relative humidity is June (82%).
Average rainfall in September
Barrow, AK
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is August (1.06").
The driest month (with the least rainfall) is January (0.2").
Average rainfall days in September
Barrow, AK
- Average rainfall days in September: 9.2 days
The month with the highest number of rainy days is August (11.9 days).
The month with the least rainy days is December (0.6 days).
Average snowfall in September
Barrow, AK
- Average snowfall in September: 1.46"
The month with the highest snowfall is October (3.15").
The month with the least snowfall is July (0.08").
Average snowfall days in September
Barrow, AK
- Average snowfall days in September: 10.5 days
The month with the highest number of snowfall days is November (16.9 days).
The month with the least snowfall days is July (1.3 days).
Average sea temperature in September
Barrow, AK
- Average sea temperature in September: 36°F
The best months for swimming (with the highest average sea temperature) are August and September (36°F).
The coldest months (with the lowest average sea temperature) are January, February, March, April, May, June and December (28°F).
Average daylight in September /
Average sunshine in September
Barrow, AK
- Average daylight in September: 13h and 24min
The month with the longest days is August (Average daylight: 18h and 48min).
The months with the shortest days are June, July and December (Average daylight: 0h and 0min).
- Average sunshine in September: 3h and 36min
The month with the most sunshine is April (Average sunshine: 6h and 6min).
The month with the least sunshine is December (Average sunshine: 0h and 18min).
Average sunshine days in September
Barrow, AK
- Average sunshine days in September: 9.2 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is October (7.9 days).
Average UV index in September
Barrow, AK
- Average UV index in September: 2
The months with the highest UV index are April, June, July and September (UV index 2).
The months with the lowest UV index are January, February, March, May, August, October, November and December (UV index 1).
Average cloud cover in September
Barrow, AK
- Average cloud cover in September: 75
The month with the most cloud cover is December (Cloud cover 84).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in September
Barrow, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January and March (4mi).
