September weather forecastEast Kittitas, WA
September
Weather in September
The first month of the autumn, September, is still a pleasant month in East Kittitas, Washington, with an average temperature varying between 49.1°F (9.5°C) and 71.1°F (21.7°C).Temperature
East Kittitas's progression into September includes a drop in the average high-temperature, from a warm 82°F (27.8°C) in August to an agreeable 71.1°F (21.7°C). East Kittitas observes a dramatic plunge from daytime highs in September, settling at an average low-temperature of 49.1°F (9.5°C).Humidity
The average relative humidity in September in East Kittitas, Washington, is 54%.Rainfall
In September, the rain falls for 6.1 days. Throughout September, 0.47" (12mm) of precipitation is accumulated. In East Kittitas, during the entire year, the rain falls for 99.9 days and collects up to 8.66" (220mm) of precipitation.Snowfall
January through April, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.31" (8mm) of snow. Throughout the year, there are 35.4 snowfall days, and 15.59" (396mm) of snow is accumulated.Daylight
In East Kittitas, the average length of the day in September is 12h and 32min.On the first day of September in East Kittitas, Washington, 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
The average sunshine in September is 10.7h.UV index
In September, the average daily maximum UV index in East Kittitas is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Exercise prevention - Precautions against solar damage are endorsed. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
East Kittitas, WA
- Average high temperature in September: 71.1°F
The warmest months (with the highest average high temperature) are July and August (82°F).
The month with the lowest average high temperature is December (33.3°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in September
East Kittitas, WA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in September
East Kittitas, WA
- Average wind speed in September: 6.9mph
The windiest month (with the highest average wind speed) is June (8.9mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in September
East Kittitas, WA
- Average humidity in September: 54%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall in September
East Kittitas, WA
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
East Kittitas, WA
- Average rainfall days in September: 6.1 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (2.8 days).
Average snowfall in September
East Kittitas, WA
- Average snowfall in September: 0.31"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
East Kittitas, WA
- Average snowfall days in September: 0.3 days
The months with the highest number of snowfall days are January and December (8.7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in September /
Average sunshine in September
East Kittitas, WA
- Average daylight in September: 12h and 30min
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: 10h and 42min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).
Average sunshine days in September
East Kittitas, WA
- Average sunshine days in September: 22.8 days
The month with the most sunshine days is July (27.1 days).
The month with the least sunshine days is February (13.5 days).
Average UV index in September
East Kittitas, 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, March, November and December (UV index 2).
Average cloud cover in September
East Kittitas, WA
- Average cloud cover in September: 18
The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
East Kittitas, 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).
