September weather forecastPalmer, AK
September
Weather in September
September in Palmer sees the commencement of the autumn season. The average temperature drops significantly from 57.6°F (14.2°C) in August to 48.7°F (9.3°C). The transition into autumn is evident with cooler days and longer nights compared to August. Going into October, both daytime and nighttime temperatures continue to decline. The decrease in temperature and daylight hours signifies the end of summer and the anticipation of a beautiful fall season ahead.Temperature
The advent of September brings a subtle shift in temperature, with the average high moving from a moderate 57.6°F (14.2°C) in August to a frosty 48.7°F (9.3°C). An average nighttime temperature of 36.5°F (2.5°C) is noted during the month of September.Humidity
In Palmer, the average relative humidity in September 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
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 Palmer, the average length of the day in September is 12h and 52min.On the first day of September, sunrise is at 6:49 am and sunset at 9:02 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 7:29 pm AKDT.
Sunshine
The average sunshine in September 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 minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 2 in September converts into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.7"Hg).
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%).
The 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").
The 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).
The 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: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 24min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is May (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
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
The months with the highest UV index are June and July (UV index 4).
The 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
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are February, March and April (4mi).
