September weather forecast
McCarthy, AK

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Weather in September

The first month of the autumn, September, is still a chilly month in McCarthy, Alaska, with an average temperature varying between 44.6°F (7°C) and 33.4°F (0.8°C).

Temperature

The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a cool 52.5°F (11.4°C) to a chilly 44.6°F (7°C). McCarthy experiences an average nighttime temperature of 33.4°F (0.8°C) in the month of September.

Humidity

In McCarthy, the average relative humidity in September is 73%.

Rainfall

The month with the most rainfall is September, when the rain falls for 16.3 days and typically aggregates up to 1.69" (43mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in McCarthy. September is the first month it typically snows. Throughout September, in the average 1 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in McCarthy, Alaska, there are 95.3 snowfall days, and 44.02" (1118mm) of snow is accumulated.

Daylight

The average length of the day in September in McCarthy is 12h and 52min.
On the first day of the month, sunrise is at 6:25 am and sunset at 8:37 pm. On the last day of September, sunrise is at 7:38 am and sunset at 7:04 pm AKDT.

Sunshine

In September, the average sunshine in McCarthy, Alaska, is 9.4h.

UV index

In McCarthy, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.
Note: In September, the UV index of 2 transforms into the following advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

Is it cold in McCarthy during September?

In McCarthy, 44.6°F (7°C) is the average high-temperature and 33.4°F (0.8°C) is the average low-temperature during September.

What is the average humidity in September in McCarthy?

In September, the average relative humidity in McCarthy is 73%.

What is the rainiest month in McCarthy?

September is the month with the most rainfall in McCarthy, Alaska. Rain falls for 16.3 days and accumulates 1.69" (43mm) of precipitation.

How much does it rain in McCarthy in September?

In McCarthy, Alaska, in September, during 16.3 rainfall days, 1.69" (43mm) of precipitation is typically accumulated.

When does it start snowing in McCarthy?

September is the first month it typically snows in McCarthy, Alaska. Throughout September, in the average 1 snowfall days, it receives 0.2" (5mm) of snow.

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

The average day length in September in McCarthy, Alaska, is 12h and 52min.

When are sunrise and sunset in September in McCarthy?

On the first day of September, sunrise is at 6:25 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:04 pm AKDT.

How long on average sun shines in September in McCarthy?

In McCarthy, Alaska, the average sunshine duration in September is 9.4h.

How high is the UV index in September in McCarthy?

The average daily maximum UV index in September in McCarthy is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
McCarthy, AK

Average temperature in September - McCarthy, AK
  • Average high temperature in September: 44.6°F

The warmest month (with the highest average high temperature) is July (56.8°F).
The month with the lowest average high temperature is January (13.5°F).

  • Average low temperature in September: 33.4°F

The month with the highest average low temperature is July (43.2°F).
The coldest month (with the lowest average low temperature) is February (1°F).

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Average pressure in September
McCarthy, AK

Average pressure in September - McCarthy, AK
  • Average pressure in September: 29.8"Hg

The month with the highest atmospheric pressure is July (29.96"Hg).
The month with the lowest atmospheric pressure is November (29.76"Hg).

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Average wind speed in September
McCarthy, AK

Average wind speed in September - McCarthy, AK
  • Average wind speed in September: 4mph

The windiest months (with the highest average wind speed) are January and November (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

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Average humidity in September
McCarthy, AK

Average humidity in September - McCarthy, AK
  • Average humidity in September: 73%

The months with the highest relative humidity are January, March, April and December (82%).
The month with the lowest relative humidity is June (66%).

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Average rainfall in September
McCarthy, AK

Average rainfall in September - McCarthy, AK
  • Average rainfall in September: 1.69"

The wettest month (with the highest rainfall) is September (1.69").
The driest month (with the least rainfall) is April (0.71").

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Average rainfall days in September
McCarthy, AK

Average rainfall days in September - McCarthy, AK
  • Average rainfall days in September: 16.3 days

The month with the highest number of rainy days is August (18.6 days).
The month with the least rainy days is February (8.4 days).

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Average snowfall in September
McCarthy, AK

Average snowfall in September - McCarthy, AK
  • Average snowfall in September: 0.2"

The month with the highest snowfall is December (9.37").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
McCarthy, AK

Average snowfall days in September - McCarthy, AK
  • Average snowfall days in September: 1 days

The month with the highest number of snowfall days is December (17.2 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in September / Average sunshine in September - McCarthy, AK
  • Average daylight in September: 12h and 5min

The month with the longest days is June (Average daylight: 19h and 18min).
The month with the shortest days is December (Average daylight: 5h and 36min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is June (Average sunshine: 14h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).

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Average sunshine days in September
McCarthy, AK

Average sunshine days in September - McCarthy, AK
  • Average sunshine days in September: 11.1 days

The month with the most sunshine days is March (15.8 days).
The month with the least sunshine days is August (9.7 days).

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Average UV index in September
McCarthy, AK

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

The months with the highest UV index are June and July (UV index 3).
The months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in September
McCarthy, AK

Average cloud cover in September - McCarthy, AK
  • Average cloud cover in September: 36

The month with the most cloud cover is December (Cloud cover 41).
The months with the least cloud cover are March, May and June (Cloud cover 35).

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Average visibility in September
McCarthy, AK

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

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

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McCarthy, Alaska, USA

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