October weather forecastIssaquah, WA
October
Weather in October
October symbolizes the onset of Autumn and brings about a notable change in weather conditions. Average high temperature drops from 70°F (21.1°C) in September to 58.6°F (14.8°C), indicating the much-awaited retreat from summer. Rainfall follows a rising trend, with October experiencing higher precipitation at 1.3" (33mm) compared to September. The average wind speed of 4.1mph (6.6km/h), a touch higher than in September, ushers in a brisk, refreshing feel. It's a month of changing hues, cooler winds, and occasional rainfall—capturing the essence of the Autumnal season.Temperature
As September transitions into October, Issaquah sees a drop in the average high-temperature, transitioning from a pleasant 70°F (21.1°C) to a refreshing 58.6°F (14.8°C). October nights observe an average temperature dip to a frosty 43.7°F (6.5°C).Humidity
In Issaquah, the average relative humidity in October is 79%.Rainfall
In Issaquah, during October, the rain falls for 11.8 days and regularly aggregates up to 1.3" (33mm) of precipitation. In Issaquah, during the entire year, the rain falls for 127.4 days and collects up to 12.52" (318mm) of precipitation.Snowfall
In Issaquah, snow does not fall in May through October.Daylight
In October, the average length of the day is 10h and 50min.On the first day of October in Issaquah, 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
In October, the average sunshine is 5.4h.UV index
In Issaquah, the average daily maximum UV index in October is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 3 during October leads to these advisories:
Be vigilant - Suggestions to stave off sun damage are provided. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Issaquah, WA
- Average high temperature in October: 58.6°F
The warmest month (with the highest average high temperature) is August (77°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 (51.4°F).
The coldest months (with the lowest average low temperature) are February and December (33.4°F).
Average pressure in October
Issaquah, 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
Issaquah, WA
- Average wind speed in October: 4.1mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in October
Issaquah, WA
- Average humidity in October: 79%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is July (69%).
Average rainfall in October
Issaquah, WA
- Average rainfall in October: 1.3"
The wettest month (with the highest rainfall) is December (2.01").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in October
Issaquah, WA
- Average rainfall days in October: 11.8 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (4.3 days).
Average snowfall in October
Issaquah, WA
- Average snowfall in October: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in October
Issaquah, WA
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in October /
Average sunshine in October
Issaquah, 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 24min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in October
Issaquah, WA
- Average sunshine days in October: 17.4 days
The month with the most sunshine days is August (25 days).
The month with the least sunshine days is February (12.9 days).
Average UV index in October
Issaquah, WA
- Average UV index in October: 3
The month with the highest UV index is 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
Issaquah, WA
- Average cloud cover in October: 45
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in October
Issaquah, WA
- Average visibility in October: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February and December (4mi).
