Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
A mild drop in Clam Gulch's average high-temperature is observed in September, transitioning from a refreshing 59.4°F (15.2°C) in August to a cool 52.5°F (11.4°C). Nights in Clam Gulch during September maintain a steady temperature, averaging at a chilly 43.5°F (6.4°C).Humidity
The average relative humidity in September is 81%.Rainfall
In Clam Gulch, in September, it is raining for 19.7 days, with typically 3.31" (84mm) of accumulated precipitation. In Clam Gulch, during the entire year, the rain falls for 167.3 days and collects up to 24.65" (626mm) 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 0.4 snowfall days, it receives 0.35" (9mm) of snow. In Clam Gulch, during the entire year, snow falls for 80.3 days and aggregates up to 44.88" (1140mm) of snow.Daylight
In Clam Gulch, the average length of the day in September is 12h and 50min.On the first day of the month, sunrise is at 7:02 am and sunset at 9:08 pm. On the last day of September, sunrise is at 8:11 am and sunset at 7:39 pm AKDT.
Sunshine
In Clam Gulch, the average sunshine in September is 6.4h.UV index
In September, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 during September translates into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
What are the temperatures in Clam Gulch in September?
What is the average humidity in September in Clam Gulch?
How much does it rain in Clam Gulch in September?
When does it start to snow in Clam Gulch?
What is the average length of the day in September in Clam Gulch?
When is the sunrise / sunset in September in Clam Gulch?
How many hours of sunshine does Clam Gulch have in September?
How high is the UV index in September in Clam Gulch?
Average temperature in September
Clam Gulch, AK
- Average high temperature in September: 52.5°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 (23.4°F).
- Average low temperature in September: 43.5°F
The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in September
Clam Gulch, AK
- Average pressure in September: 29.72"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.63"Hg).
Average wind speed in September
Clam Gulch, AK
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are January, November and December (8mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in September
Clam Gulch, AK
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Clam Gulch, AK
- Average rainfall in September: 3.31"
The wettest month (with the highest rainfall) is October (3.39").
The driest months (with the least rainfall) are March and May (1.34").
Average rainfall days in September
Clam Gulch, AK
- Average rainfall days in September: 19.7 days
The month with the highest number of rainy days is September (19.7 days).
The month with the least rainy days is February (7.4 days).
Average snowfall in September
Clam Gulch, AK
- Average snowfall in September: 0.35"
The month with the highest snowfall is December (10.43").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Clam Gulch, AK
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is December (15.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Clam Gulch, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in September: 6h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days in September
Clam Gulch, AK
- Average sunshine days in September: 8.9 days
The months with the most sunshine days are January and March (13.2 days).
The month with the least sunshine days is September (8.9 days).
Average UV index in September
Clam Gulch, 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 February and October (UV index 1).
Average cloud cover in September
Clam Gulch, AK
- Average cloud cover in September: 50
The month with the most cloud cover is December (Cloud cover 56).
The months with the least cloud cover are June and July (Cloud cover 46).
Average visibility in September
Clam Gulch, 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 January, February, March, April and December (5mi).
Clam Gulch, Alaska, USA
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