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
September signals a slight drop in average high-temperature, sliding from August's warm 77°F (25°C) to an agreeable 70.5°F (21.4°C). In Mirrormont, the nighttime temperature averages to a chilly 48.9°F (9.4°C) during September.Humidity
In September, the average relative humidity in Mirrormont is 74%.Rainfall
In September, the rain falls for 12.5 days. Throughout September, 1.69" (43mm) of precipitation is accumulated. In Mirrormont, during the entire year, the rain falls for 175.4 days and collects up to 33.9" (861mm) of precipitation.Snowfall
May through October are months without snowfall in Mirrormont.Daylight
In September, the average length of the day in Mirrormont is 12h and 32min.On the first day of September in Mirrormont, sunrise is at 6:27 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:48 pm PDT.
Sunshine
The average sunshine in September in Mirrormont is 9.1h.UV index
In Mirrormont, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 3 in September translates into this advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
What is the temperature in September in Mirrormont?
What is the average humidity in September in Mirrormont?
How many days does it rain in September in Mirrormont?
When it does not snow in Mirrormont?
What is the average length of the day in September in Mirrormont?
When is the sunrise / sunset in September in Mirrormont?
How long on average sun shines in September in Mirrormont?
What is the UV index intensity in September in Mirrormont?
Average temperature in September
Mirrormont, WA
- Average high temperature in September: 70.5°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in September: 48.9°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (33.4°F).
Average pressure in September
Mirrormont, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Mirrormont, WA
- Average wind speed in September: 3.8mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Mirrormont, WA
- Average humidity in September: 74%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Mirrormont, WA
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is December (5.12").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in September
Mirrormont, WA
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is March (19.7 days).
The month with the least rainy days is August (6.2 days).
Average snowfall in September
Mirrormont, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Mirrormont, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Mirrormont, 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: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in September
Mirrormont, WA
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in September
Mirrormont, WA
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Mirrormont, WA
- Average cloud cover in September: 36
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Mirrormont, WA
- Average visibility in September: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
Mirrormont, Washington, USA
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