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 is marked by a subtle drop in average high-temperatures, transitioning from a fresh 50.5°F (10.3°C) in August to a frosty 43.9°F (6.6°C). September's average low temperature is a wintry 36.3°F (2.4°C), displaying a subtle drop from its daily peak.Humidity
In Valdez, Alaska, the average relative humidity in September is 85%.Rainfall
In September, the rain falls for 18.5 days. Throughout September, 6.89" (175mm) of precipitation is accumulated. In Valdez, 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. Throughout the year, there are 88.9 snowfall days, and 114.06" (2897mm) of snow is accumulated.Ocean temperature
In September, the average ocean temperature is 53.2°F (11.8°C).Note: You can swim in 53.2°F (11.8°C) below 50°F (10°C) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 55.4°F (13°C) without it is tough.
Daylight
The average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 6:39 am and sunset at 8:50 pm. On the last day of September, sunrise is at 7:51 am and sunset at 7:18 pm AKDT.
Sunshine
In September, the average sunshine is 6.2h.UV index
The average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 2 in September translates into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start to snow?
How cold is the water in September?
How many hours of daylight does Valdez have in September?
When 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
Valdez, 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
Valdez, 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
Valdez, 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
Valdez, 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
Valdez, 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
Valdez, 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
Valdez, 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
Valdez, 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 sea temperature in September
Valdez, AK
- Average sea temperature in September: 53.2°F
The best month for swimming (with the highest average sea temperature) is July (56.4°F).
The coldest month (with the lowest average sea temperature) is March (38.9°F).
Average daylight in September /
Average sunshine in September
Valdez, 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
Valdez, 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
Valdez, 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
Valdez, 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
Valdez, 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).
Valdez, Alaska, USA
Weather forecast for your location
2. Allow the app to use your location