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

Temperature

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

Humidity

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

Rainfall

September is the month with the most rainfall. Rain falls for 20.6 days and accumulates 2.24" (57mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. 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. Throughout the year, in Palmer, Alaska, there are 76.2 snowfall days, and 33.5" (851mm) of snow is accumulated.

Daylight

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

Sunshine

In Palmer, the average sunshine is 8.1h.

UV index

The average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. 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.

What is the temperature in September in Palmer?

In Palmer, Alaska, in September, the average high-temperature is 48.7°F (9.3°C), and the average low-temperature is 36.5°F (2.5°C).

What is the average humidity in September in Palmer?

The average relative humidity in September in Palmer, Alaska, is 77%.

How much does it rain in Palmer in September?

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

What is the wettest month in Palmer?

September is the month with the most rainfall in Palmer. Rain falls for 20.6 days and accumulates 2.24" (57mm) of 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 Palmer, the average length of the day in September is 12.9h.

How many hours of sunshine does Palmer have in September?

The average sunshine in September is 8.1h.

How high is the UV index in September in Palmer?

In Palmer, Alaska, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays.
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).

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").

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).