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
In Skykomish, the average high-temperature in September slightly decreases from a pleasant 69.4°F (20.8°C) in August to a refreshing 62.1°F (16.7°C). Skykomish's nighttime temperature in September demonstrates a noticeable plunge to a cold 40.5°F (4.7°C).Humidity
In September, the average relative humidity in Skykomish is 77%.Rainfall
In September, in Skykomish, the rain falls for 15.1 days. Throughout September, 2.6" (66mm) of precipitation is accumulated. In Skykomish, Washington, during the entire year, the rain falls for 207.7 days and collects up to 61.81" (1570mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
In September, the average length of the day in Skykomish is 12h and 33min.On the first day of September, sunrise is at 6:25 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:45 pm PDT.
Sunshine
The average sunshine in September is 8h.UV index
In Skykomish, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The average daily UV index of 2 in September transforms into the following instructions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Frequently asked questions
What is the temperature in September in Skykomish?
What is the average humidity in September in Skykomish?
How many days does it rain in September in Skykomish?
When it does not snow in Skykomish?
How many hours of daylight does Skykomish have in September?
What time are sunrise and sunset in September in Skykomish?
How many hours of sunshine does Skykomish have in September?
How high is the UV index in September in Skykomish?
Average temperature in September
Skykomish, WA
- Average high temperature in September: 62.1°F
The warmest month (with the highest average high temperature) is August (69.4°F).
The month with the lowest average high temperature is December (32.9°F).
- Average low temperature in September: 40.5°F
The month with the highest average low temperature is August (44.2°F).
The coldest month (with the lowest average low temperature) is December (22.1°F).
Average pressure in September
Skykomish, WA
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in September
Skykomish, WA
- Average wind speed in September: 3.4mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest months (with the lowest average wind speed) are August and September (3.4mph).
Average humidity in September
Skykomish, WA
- Average humidity in September: 77%
The month with the highest relative humidity is February (93%).
The months with the lowest relative humidity are July and August (73%).
Average rainfall in September
Skykomish, WA
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is January (9.96").
The driest month (with the least rainfall) is July (0.94").
Average rainfall days in September
Skykomish, WA
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is April (22.6 days).
The month with the least rainy days is August (9.9 days).
Average snowfall in September
Skykomish, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (16.26").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Skykomish, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (11 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Skykomish, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 0min).
Average sunshine days in September
Skykomish, WA
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is August (17.9 days).
The months with the least sunshine days are February and April (5.8 days).
Average UV index in September
Skykomish, WA
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in September
Skykomish, WA
- Average cloud cover in September: 48
The month with the most cloud cover is March (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Skykomish, WA
- Average visibility in September: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January and February (3mi).
Skykomish, Washington, USA
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