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
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's comfortable 61.2°F (16.2°C) to a cool 54.1°F (12.3°C). Dillingham's nighttime temperature in September drops to an average of 41.9°F (5.5°C).Humidity
The average relative humidity in September is 79%.Rainfall
In Dillingham, in September, it is raining for 15.2 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, there are 142.3 rainfall days, and 25.12" (638mm) of precipitation is accumulated.Snowfall
In Dillingham, snow does not fall in June through September.Ocean temperature
In Dillingham, the average seawater temperature in September is 52.3°F (11.3°C).Note: While a brief time in 52.3°F (11.3°C) at 55.4°F (13°C) is already bracing, plunging below 50°F (10°C) can severely affect breathing and introduce a cold shock, relying on your physical state.
Daylight
In Dillingham, the average length of the day in September is 12h and 47min.On the first day of September, sunrise is at 7:33 am and sunset at 9:33 pm. On the last day of the month, sunrise is at 8:38 am and sunset at 8:08 pm AKDT.
Sunshine
In September, the average sunshine in Dillingham is 5.4h.UV index
The average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 2 suggests these recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the ocean temperature in September?
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 in Dillingham?
How high is the UV index in September in Dillingham?
Average temperature in September
Dillingham, AK
- Average high temperature in September: 54.1°F
The warmest month (with the highest average high temperature) is July (62.4°F).
The month with the lowest average high temperature is January (17.4°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is July (49.1°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in September
Dillingham, AK
- Average pressure in September: 29.72"Hg
The month with the highest atmospheric pressure is July (29.95"Hg).
The month with the lowest atmospheric pressure is December (29.61"Hg).
Average wind speed in September
Dillingham, AK
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is June (7.9mph).
Average humidity in September
Dillingham, AK
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is May (68%).
Average rainfall in September
Dillingham, AK
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is June (1.42").
Average rainfall days in September
Dillingham, AK
- Average rainfall days in September: 15.2 days
The month with the highest number of rainy days is August (18.1 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in September
Dillingham, AK
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.4").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dillingham, AK
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is March (11.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average sea temperature in September
Dillingham, AK
- Average sea temperature in September: 52.3°F
The best month for swimming (with the highest average sea temperature) is August (54.3°F).
The coldest month (with the lowest average sea temperature) is February (31.6°F).
Average daylight in September /
Average sunshine in September
Dillingham, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 24min).
The month with the shortest days is December (Average daylight: 6h and 18min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is June (Average sunshine: 8h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).
Average sunshine days in September
Dillingham, AK
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is March (16.2 days).
The month with the least sunshine days is August (11.2 days).
Average UV index in September
Dillingham, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Dillingham, AK
- Average cloud cover in September: 57
The month with the most cloud cover is August (Cloud cover 62).
The months with the least cloud cover are June and November (Cloud cover 54).
Average visibility in September
Dillingham, AK
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
Dillingham, Alaska, USA
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