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
The transition from August to September sees average high-temperatures adjusting to a fresh 54.1°F (12.3°C), from a not significantly different 57.9°F (14.4°C). Maintaining close parity with daytime warmth, the average nocturnal temperature during September stays at a frosty 47.5°F (8.6°C).Humidity
In Sitka, the average relative humidity in September is 87%.Rainfall
In Sitka, Alaska, in September, during 21.7 rainfall days, 7.91" (201mm) of precipitation is typically accumulated. In Sitka, during the entire year, the rain falls for 243.6 days and collects up to 82.76" (2102mm) of precipitation.Snowfall
In Sitka, Alaska, snow does not fall in June through September.Daylight
In Sitka, the average length of the day in September is 12h and 44min.On the first day of the month, sunrise is at 6:05 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:37 pm AKDT.
Sunshine
In September, the average sunshine is 5.9h.UV index
The average daily maximum UV index in September in Sitka is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 3 in September translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Sitka have in September?
What time are sunrise and sunset in September in Sitka?
How many hours of sunshine does Sitka have in September?
What is the UV index reading in September?
Average temperature in September
Sitka, AK
- Average high temperature in September: 54.1°F
The warmest month (with the highest average high temperature) is August (57.9°F).
The month with the lowest average high temperature is January (34.7°F).
- Average low temperature in September: 47.5°F
The month with the highest average low temperature is August (51.1°F).
The coldest month (with the lowest average low temperature) is February (29.7°F).
Average pressure in September
Sitka, AK
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.72"Hg).
Average wind speed in September
Sitka, AK
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is July (5.2mph).
Average humidity in September
Sitka, AK
- Average humidity in September: 87%
The month with the highest relative humidity is August (89%).
The months with the lowest relative humidity are February and March (83%).
Average rainfall in September
Sitka, AK
- Average rainfall in September: 7.91"
The wettest month (with the highest rainfall) is November (10.16").
The driest month (with the least rainfall) is May (3.82").
Average rainfall days in September
Sitka, AK
- Average rainfall days in September: 21.7 days
The month with the highest number of rainy days is October (23.5 days).
The month with the least rainy days is February (14.6 days).
Average snowfall in September
Sitka, AK
- Average snowfall in September: 0"
The month with the highest snowfall is March (17.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sitka, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (14.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sitka, AK
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 48min).
The month with the shortest days is December (Average daylight: 6h and 48min).
- Average sunshine in September: 5h and 5min
The month with the most sunshine is May (Average sunshine: 6h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Sitka, AK
- Average sunshine days in September: 7.4 days
The month with the most sunshine days is May (8.8 days).
The month with the least sunshine days is June (4.8 days).
Average UV index in September
Sitka, AK
- Average UV index in September: 3
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Sitka, AK
- Average cloud cover in September: 60
The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are February, May and September (Cloud cover 60).
Average visibility in September
Sitka, AK
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, September, October, November and December (6mi).
The months with the lowest visibility are January, June, July and August (5mi).
Sitka, Alaska, USA
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