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
The transition into September is accompanied by a temperature decrease, with the average high-temperature shifting from a warm 85.1°F (29.5°C) in August to a still moderately hot 74.1°F (23.4°C). Significant dips from daytime highs mark the September nights in East Selah, with a consistent average temperature of 51.8°F (11°C).Humidity
In September, the average relative humidity is 50%.Rainfall
In September, in East Selah, the rain falls for 4.8 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. In East Selah, Washington, during the entire year, the rain falls for 87.6 days and collects up to 5.94" (151mm) of precipitation.Snowfall
Months with snowfall in East Selah are January through April, September, November and December. September is the first month it typically snows in East Selah. Throughout September, in the average 0.1 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 19.9 snowfall days, and 8.62" (219mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 6:22 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:42 pm PDT.
Sunshine
In East Selah, the average sunshine in September is 11.1h.UV index
In September, the average daily maximum UV index in East Selah is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Be vigilant - Preventing sunburn is recommended. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Frequently asked questions
What is the temperature in September in East Selah?
What is the average humidity in September in East Selah?
How many days does it rain in September in East Selah?
When does it start snowing in East Selah?
How many hours of daylight does East Selah have in September?
When are sunrise and sunset in September in East Selah?
How many hours of sunshine does East Selah have in September?
How high is the UV index in September in East Selah?
Average temperature in September
East Selah, WA
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (36°F).
- Average low temperature in September: 51.8°F
The month with the highest average low temperature is August (58.8°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in September
East Selah, WA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in September
East Selah, WA
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is June (7.4mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in September
East Selah, WA
- Average humidity in September: 50%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (41%).
Average rainfall in September
East Selah, WA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in September
East Selah, WA
- Average rainfall days in September: 4.8 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall in September
East Selah, WA
- Average snowfall in September: 0.12"
The month with the highest snowfall is December (3.07").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in September
East Selah, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (5.7 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
East Selah, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 11h and 1min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
East Selah, WA
- Average sunshine days in September: 23.2 days
The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is February (15.5 days).
Average UV index in September
East Selah, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
East Selah, WA
- Average cloud cover in September: 15
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in September
East Selah, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
East Selah, Washington, USA
Weather forecast for your location
2. Allow the app to use your location
