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 September, the average high-temperature marginally drops from a warm 75.7°F (24.3°C) in August to a pleasant 68.9°F (20.5°C). The average low-temperature, in Bonney Lake, is 47.7°F (8.7°C).Humidity
The average relative humidity in September is 75%.Rainfall
In Bonney Lake, in September, it is raining for 12.2 days, with typically 1.61" (41mm) of accumulated precipitation. Throughout the year, in Bonney Lake, Washington, there are 185 rainfall days, and 35.71" (907mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Bonney Lake, Washington.Daylight
The average length of the day in September is 12h and 32min.On the first day of September in Bonney Lake, Washington, sunrise is at 6:28 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:50 pm PDT.
Sunshine
The average sunshine in September in Bonney Lake is 9.3h.UV index
In Bonney Lake, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
FAQ
What is the temperature in September in Bonney Lake?
What is the average humidity in September in Bonney Lake?
How many days does it rain in September in Bonney Lake?
When it does not snow in Bonney Lake?
What is the average length of the day in September in Bonney Lake?
When is the sunrise / sunset in September in Bonney Lake?
How long on average sun shines in September in Bonney Lake?
What is the UV index intensity in September in Bonney Lake?
Average temperature in September
Bonney Lake, WA
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is August (75.7°F).
The month with the lowest average high temperature is December (41.4°F).
- Average low temperature in September: 47.7°F
The month with the highest average low temperature is August (50.9°F).
The coldest month (with the lowest average low temperature) is December (32°F).
Average pressure in September
Bonney Lake, 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
Bonney Lake, WA
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Bonney Lake, WA
- Average humidity in September: 75%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in September
Bonney Lake, WA
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is December (5.35").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in September
Bonney Lake, WA
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is March (20.7 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in September
Bonney Lake, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Bonney Lake, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Bonney Lake, WA
- Average daylight in September: 12h and 32min
The month with the longest days is June (Average daylight: 15h and 52min).
The month with the shortest days is December (Average daylight: 8h and 34min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in September
Bonney Lake, WA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is August (22 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in September
Bonney Lake, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Bonney Lake, WA
- Average cloud cover in September: 35
The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Bonney Lake, 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 and December (4mi).
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