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
Galena, Alaska, in September demonstrates a small temperature transition, adjusting from an average high of a mild 60.4°F (15.8°C) in August to a frosty 48.7°F (9.3°C). In September, Galena experiences an average nighttime temperature of 35.6°F (2°C).Humidity
In September, the average relative humidity is 82%.Rainfall
In Galena, during September, the rain falls for 15 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Galena, during the entire year, the rain falls for 116.7 days and collects up to 14.8" (376mm) 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 2.3 snowfall days, it receives 0.55" (14mm) of snow. In Galena, during the entire year, snow falls for 115.2 days and aggregates up to 43.07" (1094mm) of snow.Daylight
In Galena, the average length of the day in September is 12h and 59min.On the first day of September, sunrise is at 7:11 am and sunset at 9:43 pm. On the last day of the month, sunrise is at 8:37 am and sunset at 7:57 pm AKDT.
Sunshine
In Galena, the average sunshine in September is 5.2h.UV index
In Galena, Alaska, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: In September, the average maximum UV index of 2 translates into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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 Galena?
How many days does it rain in September in Galena?
When does it start snowing?
How many hours of daylight does Galena have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Galena have in September?
What is the UV index intensity in September?
Average temperature in September
Galena, AK
- Average high temperature in September: 48.7°F
The warmest month (with the highest average high temperature) is July (67.3°F).
The month with the lowest average high temperature is January (-0.8°F).
- Average low temperature in September: 35.6°F
The month with the highest average low temperature is July (49.5°F).
The coldest month (with the lowest average low temperature) is January (-10.5°F).
Average pressure in September
Galena, AK
- Average pressure in September: 29.76"Hg
The month with the highest atmospheric pressure is February (29.93"Hg).
The months with the lowest atmospheric pressure are September and October (29.76"Hg).
Average wind speed in September
Galena, AK
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is September (5.2mph).
The calmest month (with the lowest average wind speed) is January (4.6mph).
Average humidity in September
Galena, AK
- Average humidity in September: 82%
The months with the highest relative humidity are January, February and March (96%).
The month with the lowest relative humidity is June (59%).
Average rainfall in September
Galena, AK
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is August (2.05").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Galena, AK
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is August (19 days).
The months with the least rainy days are January and February (2.3 days).
Average snowfall in September
Galena, AK
- Average snowfall in September: 0.55"
The month with the highest snowfall is December (8.62").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Galena, AK
- Average snowfall days in September: 2.3 days
The month with the highest number of snowfall days is March (20.3 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Galena, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 24min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- Average sunshine in September: 5h and 1min
The month with the most sunshine is May (Average sunshine: 8h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 18min).
Average sunshine days in September
Galena, AK
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is January (18 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in September
Galena, AK
- Average UV index in September: 2
The months with the highest UV index are May, June and July (UV index 4).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Galena, AK
- Average cloud cover in September: 59
The month with the most cloud cover is April (Cloud cover 77).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in September
Galena, AK
- Average visibility in September: 5mi
The months with the highest visibility are June and July (6mi).
The months with the lowest visibility are January, February, March, April and December (2mi).
Galena, Alaska, USA
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