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
With the arrival of September, Seward experiences a modest decline in average high-temperatures, transitioning from a refreshing 55.6°F (13.1°C) in August to a chilly 48.7°F (9.3°C). Seward registers a small shift from peak daytime temperatures, with a consistent average low-temperature of 41.9°F (5.5°C) during September.Humidity
The average relative humidity in September is 82%.Rainfall
In September, the rain falls for 17.6 days. Throughout September, 5.75" (146mm) of precipitation is accumulated. In Seward, during the entire year, the rain falls for 166.9 days and collects up to 56.06" (1424mm) of precipitation.Snowfall
June through September are months without snowfall.Ocean temperature
In September, the average ocean temperature is 53.4°F (11.9°C).Note: Dipping in 53.4°F (11.9°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In Seward, the average length of the day in September is 12h and 49min.On the first day of the month, sunrise is at 6:54 am and sunset at 8:59 pm. On the last day of September, in Seward, sunrise is at 8:03 am and sunset at 7:31 pm AKDT.
Sunshine
In Seward, the average sunshine in September is 6.2h.UV index
In Seward, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 2 leads to the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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 much does it rain in September?
When it does not snow?
Does it snow in September?
What is the water temperature in September?
How many hours of daylight does Seward have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Seward, AK
- Average high temperature in September: 48.7°F
The warmest month (with the highest average high temperature) is July (56.8°F).
The month with the lowest average high temperature is January (24.6°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is July (47.8°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Seward, AK
- Average pressure in September: 29.73"Hg
The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is November (29.61"Hg).
Average wind speed in September
Seward, AK
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is November (8.9mph).
The calmest month (with the lowest average wind speed) is June (4.8mph).
Average humidity in September
Seward, AK
- Average humidity in September: 82%
The months with the highest relative humidity are March, April and December (87%).
The month with the lowest relative humidity is June (80%).
Average rainfall in September
Seward, AK
- Average rainfall in September: 5.75"
The wettest month (with the highest rainfall) is December (7.64").
The driest month (with the least rainfall) is June (2.09").
Average rainfall days in September
Seward, AK
- Average rainfall days in September: 17.6 days
The month with the highest number of rainy days is August (19 days).
The month with the least rainy days is February (7.6 days).
Average snowfall in September
Seward, AK
- Average snowfall in September: 0"
The month with the highest snowfall is February (18.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Seward, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Seward, AK
- Average sea temperature in September: 53.4°F
The best month for swimming (with the highest average sea temperature) is August (56°F).
The coldest month (with the lowest average sea temperature) is March (39°F).
Average daylight in September /
Average sunshine in September
Seward, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in September: 6h and 1min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The months with the least sunshine are January and December (Average sunshine: 3h and 6min).
Average sunshine days in September
Seward, AK
- Average sunshine days in September: 10.6 days
The month with the most sunshine days is January (13.8 days).
The month with the least sunshine days is September (10.6 days).
Average UV index in September
Seward, AK
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, October, November and December (UV index 1).
Average cloud cover in September
Seward, AK
- Average cloud cover in September: 53
The month with the most cloud cover is December (Cloud cover 55).
The months with the least cloud cover are March and November (Cloud cover 50).
Average visibility in September
Seward, AK
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May and December (5mi).
Seward, Alaska, USA
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