Average temperature in Issaquah (WA)
The mean minimum and maximum temperatures over the year in Issaquah (Washington State), the United States of America.
- The months of July, August and September have nice average temperatures.
- On average, the warmest month is July with 24°C.
- On average, the coolest month is December with 6°C.
- The average annual maximum temperature is 15°C.
- The average annual minimum temperature is 6°C.
Forecast for Issaquah (WA)
overcast and rain
partly cloudy and rain
partly cloudy and rain