September weather forecastOrca, AK
September
Weather in September
The first month of the autumn, September, is also a fresh month in Orca, Alaska, with temperature in the range of an average low of 45.3°F (7.4°C) and an average high of 52.5°F (11.4°C).Temperature
September's commencement is accompanied by an average high-temperature of a fresh 52.5°F (11.4°C), diverging marginally from August's 57.7°F (14.3°C). The September average low temperature in Orca, marginally lower than the daytime high, records at a frosty 45.3°F (7.4°C).Humidity
In Orca, the average relative humidity in September is 82%.Rainfall
In September, the rain falls for 20.9 days. Throughout September, 8.98" (228mm) of precipitation is accumulated. In Orca, during the entire year, the rain falls for 191.3 days and collects up to 72.4" (1839mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Orca, the average length of the day in September is 12h and 50min.On the first day of September, sunrise is at 6:38 am and sunset at 8:46 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 7:16 pm AKDT.
Sunshine
In Orca, the average sunshine in September is 5.1h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Orca, AK
- Average high temperature in September: 52.5°F
The warmest month (with the highest average high temperature) is July (58.6°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in September: 45.3°F
The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Orca, AK
- Average pressure in September: 29.78"Hg
The month with the highest atmospheric pressure is July (30"Hg).
The month with the lowest atmospheric pressure is November (29.65"Hg).
Average wind speed in September
Orca, AK
- Average wind speed in September: 8mph
The windiest months (with the highest average wind speed) are January and November (12.1mph).
The calmest month (with the lowest average wind speed) is June (5.2mph).
Average humidity in September
Orca, AK
- Average humidity in September: 82%
The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is November (75%).
Average rainfall in September
Orca, AK
- Average rainfall in September: 8.98"
The wettest month (with the highest rainfall) is October (9.09").
The driest month (with the least rainfall) is June (2.72").
Average rainfall days in September
Orca, AK
- Average rainfall days in September: 20.9 days
The month with the highest number of rainy days is August (21 days).
The month with the least rainy days is February (9.6 days).
Average snowfall in September
Orca, AK
- Average snowfall in September: 0"
The month with the highest snowfall is December (17.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Orca, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Orca, AK
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 5h and 6min
The months with the most sunshine are May, June and July (Average sunshine: 7h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 6min).
Average sunshine days in September
Orca, AK
- Average sunshine days in September: 8 days
The month with the most sunshine days is July (12.1 days).
The month with the least sunshine days is September (8 days).
Average UV index in September
Orca, 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 November and December (UV index 1).
Average cloud cover in September
Orca, AK
- Average cloud cover in September: 63
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is May (Cloud cover 57).
Average visibility in September
Orca, AK
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January, August and December (5mi).
