September weather forecast and climate
Ruby, AK

Weather in September

September, the first month of the autumn, in Ruby, is still a chilly month, with average temperature ranging between max 48.7°F (9.3°C) and min 35.6°F (2°C).

Temperature

In Ruby, the average high-temperature in September decreases, from a mild 60.4°F (15.8°C) in August, to a frosty 48.7°F (9.3°C). In Ruby, the average low-temperature is 35.6°F (2°C).

Humidity

In September, the average relative humidity is 82%.

Rainfall

In Ruby, Alaska, during September, the rain falls for 15 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Ruby, 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 in Ruby. Throughout September, in the average 2.3 snowfall days, it receives 0.55" (14mm) of snow. Throughout the year, in Ruby, there are 115.2 snowfall days, and 43.07" (1094mm) of snow is accumulated.

Daylight

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

Sunshine

The average sunshine in September is 5.2h.

UV index

The average daily maximum UV index in Ruby, Alaska, is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 2 translate 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. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Ruby?

In Ruby, in September, the average high-temperature is 48.7°F (9.3°C), and the average low-temperature is 35.6°F (2°C).

What is the average humidity in September in Ruby?

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

How many days does it rain in September in Ruby?

In September, in Ruby, the rain falls for 15 days. Throughout September, 1.57" (40mm) of precipitation is accumulated.

When does it start snowing in Ruby?

September is the first month it typically snows in Ruby. 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 Ruby?

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

How long on average sun shines in September in Ruby?

The average sunshine in September in Ruby, Alaska, is 5.2h.

What is the UV index intensity in September in Ruby?

The average daily maximum UV index in September in Ruby, Alaska, is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Ruby, AK

Average temperature in September - Ruby, 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
Ruby, AK

Average pressure in September - Ruby, 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
Ruby, AK

Average wind speed in September - Ruby, 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
Ruby, AK

Average humidity in September - Ruby, 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
Ruby, AK

Average rainfall in September - Ruby, 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
Ruby, AK

Average rainfall days in September - Ruby, 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
Ruby, AK

Average snowfall in September - Ruby, 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
Ruby, AK

Average snowfall days in September - Ruby, 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
Ruby, AK

Average daylight in September / Average sunshine in September - Ruby, 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
Ruby, AK

Average sunshine days in September - Ruby, 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
Ruby, AK

Average UV index in September - Ruby, 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
Ruby, AK

Average cloud cover in September - Ruby, 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
Ruby, AK

Average visibility in September - Ruby, 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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