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
The advent of September brings a subtle shift in temperature, with the average high moving from a cool 50.5°F (10.3°C) in August to a frosty 43.9°F (6.6°C). Wortmanns maintains a consistent average nighttime low-temperature of 36.3°F (2.4°C) throughout September.Humidity
In September, the average relative humidity is 85%.Rainfall
In Wortmanns, during September, the rain falls for 18.5 days and regularly aggregates up to 6.89" (175mm) of precipitation. In Wortmanns, during the entire year, the rain falls for 167.5 days and collects up to 56.73" (1441mm) 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 0.1 snowfall days, it receives 0.16" (4mm) of snow. In Wortmanns, during the entire year, snow falls for 88.9 days and aggregates up to 114.06" (2897mm) of snow.Daylight
In September, the average length of the day is 12h and 52min.On the first day of the month, sunrise is at 6:37 am and sunset at 8:48 pm. On the last day of September, in Wortmanns, sunrise is at 7:49 am and sunset at 7:16 pm AKDT.
Sunshine
In Wortmanns, the average sunshine in September is 6.2h.UV index
In September, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 2 in September translates into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in September?
What is the average humidity in September in Wortmanns?
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 long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Wortmanns, AK
- Average high temperature in September: 43.9°F
The warmest month (with the highest average high temperature) is July (53.2°F).
The month with the lowest average high temperature is January (18°F).
- Average low temperature in September: 36.3°F
The month with the highest average low temperature is July (43.2°F).
The coldest month (with the lowest average low temperature) is January (10°F).
Average pressure in September
Wortmanns, AK
- Average pressure in September: 29.78"Hg
The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is November (29.69"Hg).
Average wind speed in September
Wortmanns, AK
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is November (8.1mph).
The calmest month (with the lowest average wind speed) is July (3.7mph).
Average humidity in September
Wortmanns, AK
- Average humidity in September: 85%
The months with the highest relative humidity are January and April (88%).
The months with the lowest relative humidity are May, June, July and November (83%).
Average rainfall in September
Wortmanns, AK
- Average rainfall in September: 6.89"
The wettest month (with the highest rainfall) is December (7.44").
The driest month (with the least rainfall) is June (1.93").
Average rainfall days in September
Wortmanns, AK
- Average rainfall days in September: 18.5 days
The month with the highest number of rainy days is August (18.7 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in September
Wortmanns, AK
- Average snowfall in September: 0.16"
The month with the highest snowfall is December (26.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Wortmanns, AK
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (17.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Wortmanns, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 12min).
The month with the shortest days is December (Average daylight: 5h and 42min).
- Average sunshine in September: 6h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 2h and 48min).
Average sunshine days in September
Wortmanns, AK
- Average sunshine days in September: 9.8 days
The months with the most sunshine days are January and May (12.3 days).
The month with the least sunshine days is December (9.7 days).
Average UV index in September
Wortmanns, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 3).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Wortmanns, AK
- Average cloud cover in September: 56
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 50).
Average visibility in September
Wortmanns, AK
- Average visibility in September: 5mi
The month with the highest visibility is June (6mi).
The months with the lowest visibility are January, February and April (4mi).
Wortmanns, Alaska, USA
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