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
September's onset introduces a mild reduction in the average high-temperature, from a mild 59°F (15°C) in August to a fresh 51.1°F (10.6°C). Marshall's nights in September experience an average temperature drop to a wintry 40.1°F (4.5°C).Humidity
The average relative humidity in September is 81%.Rainfall
In September, the rain falls for 14.5 days. Throughout September, 1.77" (45mm) of precipitation is accumulated. Throughout the year, there are 104.5 rainfall days, and 15.75" (400mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Marshall. September is the first month it typically snows. Throughout September, in the average 0.8 snowfall days, it receives 0.12" (3mm) of snow. In Marshall, during the entire year, snow falls for 71.4 days and aggregates up to 22.72" (577mm) of snow.Daylight
In September, the average length of the day is 12h and 53min.On the first day of the month, sunrise is at 7:40 am and sunset at 9:55 pm. On the last day of September, sunrise is at 8:55 am and sunset at 8:20 pm AKDT.
Sunshine
The average sunshine in September is 4.5h.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 exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 2 during September translates into these guidelines:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Marshall in September?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Marshall have in September?
How high is the UV index in September?
Average temperature in September
Marshall, AK
- Average high temperature in September: 51.1°F
The warmest month (with the highest average high temperature) is July (61.5°F).
The month with the lowest average high temperature is January (11.3°F).
- Average low temperature in September: 40.1°F
The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is January (2.3°F).
Average pressure in September
Marshall, AK
- Average pressure in September: 29.72"Hg
The month with the highest atmospheric pressure is July (29.91"Hg).
The months with the lowest atmospheric pressure are October and December (29.67"Hg).
Average wind speed in September
Marshall, AK
- Average wind speed in September: 10.2mph
The windiest month (with the highest average wind speed) is February (11.9mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in September
Marshall, AK
- Average humidity in September: 81%
The months with the highest relative humidity are January, February, March and December (91%).
The month with the lowest relative humidity is June (66%).
Average rainfall in September
Marshall, AK
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is August (2.13").
The driest months (with the least rainfall) are January and June (0.87").
Average rainfall days in September
Marshall, AK
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is August (17.8 days).
The months with the least rainy days are January and February (2.4 days).
Average snowfall in September
Marshall, AK
- Average snowfall in September: 0.12"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Marshall, AK
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is February (11.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Marshall, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 30min).
The month with the shortest days is December (Average daylight: 5h and 24min).
- Average sunshine in September: 4h and 3min
The month with the most sunshine is May (Average sunshine: 7h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 36min).
Average sunshine days in September
Marshall, AK
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is March (19.5 days).
The month with the least sunshine days is August (10.9 days).
Average UV index in September
Marshall, AK
- Average UV index in September: 2
The months with the highest UV index are May, June, July and August (UV index 3).
The months with the lowest UV index are March, November and December (UV index 1).
Average cloud cover in September
Marshall, AK
- Average cloud cover in September: 64
The month with the most cloud cover is July (Cloud cover 68).
The month with the least cloud cover is June (Cloud cover 54).
Average visibility in September
Marshall, 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).
Marshall, Alaska, USA
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