October weather forecastSammamish, WA
October
Weather in October
October witnesses a more visible transition towards colder weather in Sammamish. There is a significant drop in maximum temperatures as compared to September, alluding to a chilly autumn. October sees a rise in rainfall compared to the previous month with a total of 1.46" (37mm) indicating the increasing humidity. The decline in daylight and sunshine hours along with a drop in UV index mark a clear change in the city's climate. The cool winds, measured at an average speed of 4.1mph (6.6km/h), provide a mild chill, becoming a precursor to the upcoming winter.Temperature
The onset of October introduces a moderate change in Sammamish's weather, with average high-temperatures falling from September's pleasant 69.8°F (21°C) to a refreshing 58.5°F (14.7°C). October witnesses an average low-temperature hovering around a frosty 43.7°F (6.5°C).Humidity
In Sammamish, the average relative humidity in October is 79%.Rainfall
In Sammamish, in October, during 12.8 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Sammamish, during the entire year, the rain falls for 136.7 days and collects up to 13.39" (340mm) of precipitation.Snowfall
In Sammamish, snow does not fall in May through October.Daylight
In Sammamish, the average length of the day in October is 10h and 50min.On the first day of October, sunrise is at 7:08 am and sunset at 6:46 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 5:51 pm PDT.
Sunshine
The average sunshine in October is 5.5h.UV index
The average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 3 in October translates into this advice:
Take necessary precautions - Defending against sun damage is advocated. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Sammamish, WA
- Average high temperature in October: 58.5°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in October: 43.7°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in October
Sammamish, WA
- Average pressure in October: 30.04"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 October
Sammamish, WA
- Average wind speed in October: 4.1mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in October
Sammamish, WA
- Average humidity in October: 79%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (70%).
Average rainfall in October
Sammamish, WA
- Average rainfall in October: 1.46"
The wettest month (with the highest rainfall) is December (1.85").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in October
Sammamish, WA
- Average rainfall days in October: 12.8 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in October
Sammamish, WA
- Average snowfall in October: 0"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in October
Sammamish, WA
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in October /
Average sunshine in October
Sammamish, WA
- Average daylight in October: 10h and 48min
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 October: 5h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).
Average sunshine days in October
Sammamish, WA
- Average sunshine days in October: 16.3 days
The month with the most sunshine days is August (24 days).
The month with the least sunshine days is November (13.5 days).
Average UV index in October
Sammamish, WA
- Average UV index in October: 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 October
Sammamish, WA
- Average cloud cover in October: 43
The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in October
Sammamish, WA
- Average visibility in October: 5mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (5mi).
