September weather forecast
Palmer, AK

The scenic Mountain Park within the Mine State Historical Park in Palmer Province, Alaska
The scenic Mountain Park within the Mine State Historical Park in Palmer Province, Alaska

Weather in September

September, the first month of the autumn, in Palmer, is also a frosty month, with average temperature fluctuating between 48.7°F (9.3°C) and 36.5°F (2.5°C).

Temperature

In September, the average high-temperature marginally drops, from a moderate 57.6°F (14.2°C) in August, to a chilly 48.7°F (9.3°C). The average low-temperature, in September, is 36.5°F (2.5°C).

Humidity

In Palmer, the average relative humidity in September is 77%.

Rainfall

The month with the most rainfall in Palmer is September when the rain falls for 20.6 days and typically aggregates up to 2.24" (57mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.08" (2mm) of snow. In Palmer, during the entire year, snow falls for 76.2 days, and aggregates up to 33.5" (851mm) of snow.

Daylight

In September, the average length of the day is 12.9h.

Sunshine

The average sunshine in Palmer is 8.1h.

UV index

In September, the average daily maximum UV index in Palmer is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 average humidity in September in Palmer?

In Palmer, the average relative humidity in September is 77%.

What is the rainiest month in Palmer?

The month with the most rainfall in Palmer, Alaska, is September when the rain falls for 20.6 days and typically aggregates up to 2.24" (57mm) of precipitation.

How many days does it rain in September in Palmer?

In Palmer, Alaska, in September, it is raining for 20.6 days, with typically 2.24" (57mm) of accumulated precipitation.

When does it start snowing in Palmer?

September is the first month it typically snows in Palmer. Throughout September, in the average 0.2 snowfall days, it receives 0.08" (2mm) of snow.

How many hours of daylight does Palmer have in September?

In September, the average length of the day in Palmer, Alaska, is 12.9h.

How long on average sun shines in September in Palmer?

The average sunshine in September is 8.1h.

How high is the UV index in September in Palmer?

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

Average temperature in September
Palmer, AK

Average temperature in September - Palmer, AK
  • Average high temperature in September: 48.7°F

The warmest month (with the highest average high temperature) is July (61.2°F).
The month with the lowest average high temperature is January (18.1°F).

  • Average low temperature in September: 36.5°F

The month with the highest average low temperature is July (44.2°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).

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Average pressure in September
Palmer, AK

Average pressure in September - Palmer, AK
  • Average pressure in September: 29.75"

The month with the highest atmospheric pressure is July (29.96").
Months with the lowest atmospheric pressure are November and December (29.7").

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Average wind speed in September
Palmer, AK

Average wind speed in September - Palmer, AK
  • Average wind speed in September: 4.3mph

The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is July (4mph).

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Average humidity in September
Palmer, AK

Average humidity in September - Palmer, AK
  • Average humidity in September: 77%

The month with the highest relative humidity is March (87%).
Months with the lowest relative humidity are May and June (69%).

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Average rainfall in September
Palmer, AK

Average rainfall in September - Palmer, AK
  • Average rainfall in September: 2.24"

The wettest month (with the highest rainfall) is September (2.24").
The driest month (with the least rainfall) is January (0.91").

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Average rainfall days in September
Palmer, AK

Average rainfall days in September - Palmer, AK
  • Average rainfall days in September: 20.6 days

The month with the highest number of rainy days is June (22.4 days).
The month with the least rainy days is February (8.9 days).

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Average snowfall in September
Palmer, AK

Average snowfall in September - Palmer, AK
  • Average snowfall in September: 0.08"

The month with the highest snowfall is February (6.93").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Palmer, AK

Average snowfall days in September - Palmer, AK
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is February (14.1 days).
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
Palmer, AK

Average daylight in September / Average sunshine in September - Palmer, AK
  • Average daylight in September: 12.9h

The month with the longest days is June (Average daylight: 19.4h).
The month with the shortest days is December (Average daylight: 5.5h).

  • Average sunshine in September: 8.1h

The month with the most sunshine is May (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 3.9h).

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Average sunshine days in September
Palmer, AK

Average sunshine days in September - Palmer, AK
  • Average sunshine days in September: 7.5 days

The month with the most sunshine days is January (13.9 days).
The month with the least sunshine days is June (5.3 days).

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Average UV index in September
Palmer, AK

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

Months with the highest UV index are June and July (UV index 4).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in September
Palmer, AK

Average cloud cover in September - Palmer, AK
  • Average cloud cover in September: 42

The month with the most cloud cover is April (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 37).

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Average visibility in September
Palmer, AK

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

Months with the highest visibility are May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are February, March and April (4mi).

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