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
In Mendeltna, the average high-temperature in September drops from a fresh 52.7°F (11.5°C) in August to a chilly 43.2°F (6.2°C). In the month of September, the nighttime temperature dips to a steady average of 32.7°F (0.4°C).Humidity
In Mendeltna, the average relative humidity in September is 77%.Rainfall
In September, the rain falls for 17 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. Throughout the year, there are 165.3 rainfall days, and 17.99" (457mm) of precipitation is accumulated.Snowfall
January through June, August through December are months with snowfall. In Mendeltna, during September, snow falls for 6.7 days and regularly aggregates up to 4.29" (109mm) of snow. In Mendeltna, during the entire year, snow falls for 161.6 days and aggregates up to 83.27" (2115mm) of snow.Daylight
The average length of the day in September is 12h and 53min.On the first day of September, sunrise is at 6:37 am and sunset at 8:53 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 7:18 pm AKDT.
Sunshine
In Mendeltna, the average sunshine in September is 8.6h.UV index
The months with the lowest UV index are January, April, September through December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 1 in September converts into the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is September?
What is the average humidity in September?
How much does it rain in September?
How many days does it snow in September?
How many hours of daylight does Mendeltna have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Mendeltna have in September?
What are the months with the lowest UV index?
What is the UV index reading in September?
Average temperature in September
Mendeltna, AK
- Average high temperature in September: 43.2°F
The warmest month (with the highest average high temperature) is July (57.7°F).
The month with the lowest average high temperature is January (6.3°F).
- Average low temperature in September: 32.7°F
The month with the highest average low temperature is July (43.7°F).
The coldest month (with the lowest average low temperature) is January (-5.6°F).
Average pressure in September
Mendeltna, AK
- Average pressure in September: 29.77"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.74"Hg).
Average wind speed in September
Mendeltna, AK
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is June (5mph).
The calmest month (with the lowest average wind speed) is March (3.9mph).
Average humidity in September
Mendeltna, AK
- Average humidity in September: 77%
The months with the highest relative humidity are March and December (90%).
The month with the lowest relative humidity is June (64%).
Average rainfall in September
Mendeltna, AK
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is August (2.01").
The driest month (with the least rainfall) is April (0.83").
Average rainfall days in September
Mendeltna, AK
- Average rainfall days in September: 17 days
The month with the highest number of rainy days is August (20.8 days).
The month with the least rainy days is February (9.1 days).
Average snowfall in September
Mendeltna, AK
- Average snowfall in September: 4.29"
The month with the highest snowfall is December (14.49").
The month with the least snowfall is July (0").
Average snowfall days in September
Mendeltna, AK
- Average snowfall days in September: 6.7 days
The month with the highest number of snowfall days is December (22.3 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Mendeltna, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 36min).
The month with the shortest days is December (Average daylight: 5h and 18min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).
Average sunshine days in September
Mendeltna, AK
- Average sunshine days in September: 7.8 days
The month with the most sunshine days is May (10.7 days).
The month with the least sunshine days is June (6.8 days).
Average UV index in September
Mendeltna, AK
- Average UV index in September: 1
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, April, September, October, November and December (UV index 1).
Average cloud cover in September
Mendeltna, AK
- Average cloud cover in September: 41
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in September
Mendeltna, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Mendeltna, Alaska, USA
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