September weather forecastNome, AK
September
Weather in September
September in Nome, Alaska, sees a significant drop in temperatures from August, signaling the onset of autumn. A distinct chill permeates the air as the season transitions. However, it's an ideal time to explore the foliage colors that paint the scenic Nome landscapes. Days are still longer than nights, albeit noticeably shorter than summer. As autumn deepens, make sure to keep warmer clothing handy for the chilly nights.Temperature
September's arrival subtly correlates with a reduction in the average high-temperature, down from a cool 54°F (12.2°C) in August to a chilly 47.3°F (8.5°C). In Nome, the nighttime temperature in September descends gently to an average of 42.1°F (5.6°C).Humidity
The average relative humidity in September is 78%.Rainfall
In September, the rain falls for 11.5 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. In Nome, during the entire year, the rain falls for 81.6 days and collects up to 16.77" (426mm) 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 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.Ocean temperature
In September, the average ocean temperature is 48.6°F (9.2°C).Note: Diving into 48.6°F (9.2°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
In September, the average length of the day in Nome is 12h and 59min.On the first day of September, sunrise is at 7:46 am and sunset at 10:16 pm. On the last day of the month, sunrise is at 9:10 am and sunset at 8:31 pm AKDT.
Sunshine
In September, the average sunshine is 5.8h.UV index
In Nome, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 2 during September leads to these advisories:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Nome, 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
Nome, 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
Nome, 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
Nome, 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
Nome, 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
Nome, 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
Nome, 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
Nome, 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 sea temperature in September
Nome, AK
- Average sea temperature in September: 48.5°F
The best month for swimming (with the highest average sea temperature) is August (52.5°F).
The coldest months (with the lowest average sea temperature) are March and April (28.9°F).
Average daylight in September /
Average sunshine in September
Nome, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 12min).
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
Nome, 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
Nome, 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
Nome, 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
Nome, 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).
