September weather forecast and climate
Galena, AK

Weather in September

The first month of the autumn, September, is also a frosty month in Galena, Alaska, with temperature in the range of an average low of 35.6°F (2°C) and an average high of 48.7°F (9.3°C).

Temperature

In Galena, the average high-temperature decreases, from a moderate 60.4°F (15.8°C) in August, to a chilly 48.7°F (9.3°C). The average low-temperature, in Galena, Alaska, is 35.6°F (2°C).

Humidity

In Galena, the average relative humidity in September is 82%.

Rainfall

In Galena, it is raining for 15 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 116.7 rainfall days, and 14.8" (376mm) of precipitation is accumulated.

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. Throughout the year, in Galena, there are 115.2 snowfall days, and 43.07" (1094mm) of snow is accumulated.

Daylight

In Galena, the average length of the day in September is 13h.

Sunshine

The average sunshine in Galena is 5.2h.

UV index

In Galena, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in September in Galena?

The average high-temperature, in September, in Galena, Alaska, is 48.7°F (9.3°C), while the average low-temperature is 35.6°F (2°C).

What is the average humidity in September in Galena?

In September, the average relative humidity in Galena, Alaska, is 82%.

How much does it rain in Galena in September?

In Galena, Alaska, during September, the rain falls for 15 days and regularly aggregates up to 1.57" (40mm) of precipitation.

When does it start to snow in Galena?

September is the first month it typically snows in Galena, Alaska. Throughout September, in the average 2.3 snowfall days, it receives 0.55" (14mm) of snow.

What is the average length of the day in September in Galena?

In September, the average length of the day in Galena is 13h.

How long on average sun shines in September in Galena?

The average sunshine in September is 5.2h.

What is the UV index intensity in September in Galena?

In September, the average daily maximum UV index in Galena, Alaska, is 2. A UV Index value of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV radiation.

Average temperature in September
Galena, AK

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).

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Average pressure in September
Galena, AK

Average pressure in September - Galena, AK
  • Average pressure in September: 29.76"

The month with the highest atmospheric pressure is February (29.93").
Months with the lowest atmospheric pressure are September and October (29.76").

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Average wind speed in September
Galena, AK

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).

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Average humidity in September
Galena, AK

Average humidity in September - Galena, AK
  • Average humidity in September: 82%

Months with the highest relative humidity are January, February and March (96%).
The month with the lowest relative humidity is June (59%).

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Average rainfall in September
Galena, AK

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").

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Average rainfall days in September
Galena, AK

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).
Months with the least rainy days are January and February (2.3 days).

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Average snowfall in September
Galena, AK

Average snowfall in September - Galena, AK
  • Average snowfall in September: 0.55"

The month with the highest snowfall is December (8.62").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Galena, AK

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).
Months with the least snowfall days are June and July (0 days).

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Average daylight in September /
Average sunshine in September
Galena, AK

Average daylight in September / Average sunshine in September - Galena, AK
  • Average daylight in September: 13h

The month with the longest days is June (Average daylight: 21.4h).
The month with the shortest days is December (Average daylight: 4h).

  • Average sunshine in September: 5.2h

The month with the most sunshine is May (Average sunshine: 8.1h).
The month with the least sunshine is December (Average sunshine: 2.3h).

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Average sunshine days in September
Galena, AK

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).

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Average UV index in September
Galena, AK

Average UV index in September - Galena, AK
  • Average UV index in September: 2

Months with the highest UV index are May, June and July (UV index 4).
Months with the lowest UV index are January, February, March, October, November and December (UV index 1).

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Average cloud cover in September
Galena, AK

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).

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Average visibility in September
Galena, AK

Average visibility in September - Galena, AK
  • Average visibility in September: 5mi

Months with the highest visibility are June and July (6mi).
Months with the lowest visibility are January, February, March, April and December (2mi).

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