September weather forecast and climate
Orca, AK

Weather in September

September, the first month of the autumn, in Orca, is also a fresh month, with average temperature fluctuating between 45.3°F (7.4°C) and 52.5°F (11.4°C).

Temperature

In September, the average high-temperature is practically the same as in August - a cool 52.5°F (11.4°C). In September, in Orca, the average low-temperature is 45.3°F (7.4°C).

Humidity

The average relative humidity in Orca is 82%.

Rainfall

In Orca, Alaska, during September, the rain falls for 20.9 days and regularly aggregates up to 8.98" (228mm) of precipitation. Throughout the year, there are 191.3 rainfall days, and 72.4" (1839mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Orca.

Daylight

In September, the average length of the day in Orca is 12.8h.

Sunshine

In September, the average sunshine is 5.1h.

UV index

In Orca, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Orca?

The average high-temperature, in September, in Orca, is 52.5°F (11.4°C), while the average low-temperature is 45.3°F (7.4°C).

What is the average humidity in September in Orca?

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

How many days does it rain in September in Orca?

In September, in Orca, Alaska, the rain falls for 20.9 days. Throughout September, 8.98" (228mm) of precipitation is accumulated.

Does it snow in Orca in September?

In Orca, Alaska, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Orca?

In Orca snow does not fall in June through September.

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

In September, the average length of the day in Orca, Alaska, is 12.8h.

How long on average sun shines in September in Orca?

The average sunshine in September in Orca, Alaska, is 5.1h.

What is the UV index reading in September in Orca?

In Orca, Alaska, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.

Average temperature in September
Orca, AK

Average temperature in September - Orca, AK
  • Average high temperature in September: 52.5°F

The warmest month (with the highest average high temperature) is July (58.6°F).
The month with the lowest average high temperature is January (30.2°F).

  • Average low temperature in September: 45.3°F

The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure in September
Orca, AK

Average pressure in September - Orca, AK
  • Average pressure in September: 29.78"

The month with the highest atmospheric pressure is July (30").
The month with the lowest atmospheric pressure is November (29.65").

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Average wind speed in September
Orca, AK

Average wind speed in September - Orca, AK
  • Average wind speed in September: 8mph

The windiest months (with the highest average wind speed) are January and November (12.1mph).
The calmest month (with the lowest average wind speed) is June (5.2mph).

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Average humidity in September
Orca, AK

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

The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is November (75%).

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Average rainfall in September
Orca, AK

Average rainfall in September - Orca, AK
  • Average rainfall in September: 8.98"

The wettest month (with the highest rainfall) is October (9.09").
The driest month (with the least rainfall) is June (2.72").

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Average rainfall days in September
Orca, AK

Average rainfall days in September - Orca, AK
  • Average rainfall days in September: 20.9 days

The month with the highest number of rainy days is August (21 days).
The month with the least rainy days is February (9.6 days).

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Average snowfall in September
Orca, AK

Average snowfall in September - Orca, AK
  • Average snowfall in September: 0"

The month with the highest snowfall is December (17.76").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Orca, AK

Average snowfall days in September - Orca, AK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (12.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Orca, AK
  • Average daylight in September: 12.8h

The month with the longest days is June (Average daylight: 18.9h).
The month with the shortest days is December (Average daylight: 5.8h).

  • Average sunshine in September: 5.1h

Months with the most sunshine are May, June and July (Average sunshine: 7.6h).
The month with the least sunshine is December (Average sunshine: 2.1h).

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Average sunshine days in September
Orca, AK

Average sunshine days in September - Orca, AK
  • Average sunshine days in September: 8 days

The month with the most sunshine days is July (12.1 days).
The month with the least sunshine days is September (8 days).

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Average UV index in September
Orca, AK

Average UV index in September - Orca, AK
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 4).
Months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in September
Orca, AK

Average cloud cover in September - Orca, AK
  • Average cloud cover in September: 63

The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is May (Cloud cover 57).

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Average visibility in September
Orca, AK

Average visibility in September - Orca, AK
  • Average visibility in September: 6mi

Months with the highest visibility are February, March, April, May, June, July, September, October and November (6mi).
Months with the lowest visibility are January, August and December (5mi).

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