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 sea temperature 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 records a minor alteration in the average high-temperature to a still mild 56.3°F (13.5°C) from August's 59.7°F (15.4°C). Metlakatla reports an average low temperature of 50.9°F (10.5°C) in September, a minor decrease from the day's highs.Humidity
The average relative humidity in September is 85%.Rainfall
In September, the rain falls for 18.7 days. Throughout September, 7.8" (198mm) of precipitation is accumulated. In Metlakatla, Alaska, during the entire year, the rain falls for 227.1 days and collects up to 90.98" (2311mm) of precipitation.Snowfall
In Metlakatla, snow does not fall in May through October.Ocean temperature
In Metlakatla, in September, the average water temperature is 53.2°F (11.8°C).Note: Dipping in 53.2°F (11.8°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In September, the average length of the day is 12h and 41min.On the first day of the month, sunrise is at 5:54 am and sunset at 7:37 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:23 pm AKDT.
Sunshine
The average sunshine in September is 6.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Undertake protective steps - Preventing sun damage is advised. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How cold is the water in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Metlakatla have in September?
How high is the UV index in September?
Average temperature in September
Metlakatla, AK
- Average high temperature in September: 56.3°F
The warmest month (with the highest average high temperature) is August (59.7°F).
The month with the lowest average high temperature is December (39.2°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is February (34.3°F).
Average pressure in September
Metlakatla, AK
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is July (30.06"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed in September
Metlakatla, AK
- Average wind speed in September: 9mph
The windiest month (with the highest average wind speed) is January (13.3mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in September
Metlakatla, AK
- Average humidity in September: 85%
The month with the highest relative humidity is August (87%).
The month with the lowest relative humidity is February (78%).
Average rainfall in September
Metlakatla, AK
- Average rainfall in September: 7.8"
The wettest month (with the highest rainfall) is November (10.67").
The driest month (with the least rainfall) is May (3.7").
Average rainfall days in September
Metlakatla, AK
- Average rainfall days in September: 18.7 days
The month with the highest number of rainy days is November (23 days).
The month with the least rainy days is February (15.2 days).
Average snowfall in September
Metlakatla, AK
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Metlakatla, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (8.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Metlakatla, AK
- Average sea temperature in September: 53.3°F
The best month for swimming (with the highest average sea temperature) is August (55.9°F).
The coldest month (with the lowest average sea temperature) is March (42.5°F).
Average daylight in September /
Average sunshine in September
Metlakatla, AK
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 18min).
- Average sunshine in September: 6h and 2min
The month with the most sunshine is May (Average sunshine: 7h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Metlakatla, AK
- Average sunshine days in September: 10.2 days
The months with the most sunshine days are May and August (12.2 days).
The month with the least sunshine days is November (5.6 days).
Average UV index in September
Metlakatla, AK
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Metlakatla, AK
- Average cloud cover in September: 55
The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are May and September (Cloud cover 55).
Average visibility in September
Metlakatla, AK
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Metlakatla, Alaska, USA
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