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 Nine Mile Falls, the average high-temperature in September decreases from a moderately hot 83.7°F (28.7°C) in August to a pleasant 72.9°F (22.7°C). September nights in Nine Mile Falls see a notable contrast from daytime highs, with the nighttime temperature averaging at a fresh 50.7°F (10.4°C).Humidity
In September, the average relative humidity is 48%.Rainfall
In Nine Mile Falls, in September, it is raining for 7.5 days, with typically 0.63" (16mm) of accumulated precipitation. In Nine Mile Falls, during the entire year, the rain falls for 127.8 days and collects up to 16.93" (430mm) of precipitation.Snowfall
Months with snowfall in Nine Mile Falls, Washington, are January through May, September through December. September is the first month it typically snows in Nine Mile Falls. Throughout September, in the average 0.2 snowfall days, it receives 0.47" (12mm) of snow. Throughout the year, in Nine Mile Falls, there are 62.3 snowfall days, and 37.83" (961mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:09 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:30 pm PDT.
Sunshine
In September, the average sunshine in Nine Mile Falls is 10.2h.UV index
In September, the average daily maximum UV index in Nine Mile Falls, Washington, is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Around midday, solar radiation is most harmful; hence, exposure should be limited. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the temperature in September in Nine Mile Falls?
What is the average humidity in September in Nine Mile Falls?
How much does it rain in Nine Mile Falls in September?
When does it start snowing in Nine Mile Falls?
What is the average length of the day in September in Nine Mile Falls?
What time are sunrise and sunset in September in Nine Mile Falls?
How many hours of sunshine does Nine Mile Falls have in September?
How high is the UV index in September in Nine Mile Falls?
Average temperature in September
Nine Mile Falls, WA
- Average high temperature in September: 72.9°F
The warmest months (with the highest average high temperature) are July and August (83.7°F).
The month with the lowest average high temperature is December (32.2°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is August (59°F).
The coldest month (with the lowest average low temperature) is December (22.1°F).
Average pressure in September
Nine Mile Falls, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in September
Nine Mile Falls, WA
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Nine Mile Falls, WA
- Average humidity in September: 48%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Nine Mile Falls, WA
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is March (2.13").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in September
Nine Mile Falls, WA
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is April (16.3 days).
The month with the least rainy days is July (4.9 days).
Average snowfall in September
Nine Mile Falls, WA
- Average snowfall in September: 0.47"
The month with the highest snowfall is January (10.39").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Nine Mile Falls, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (15.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Nine Mile Falls, 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: 10h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in September
Nine Mile Falls, WA
- Average sunshine days in September: 20.3 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is March (9.8 days).
Average UV index in September
Nine Mile Falls, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Nine Mile Falls, WA
- Average cloud cover in September: 20
The months with the most cloud cover are January and December (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in September
Nine Mile Falls, WA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
Nine Mile Falls, Washington, USA
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