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Issaquah
Weather averages
ClimateForecastAprilMay >>

Climate in Issaquah (Washington State), United States of America

The graphs below show the monthly weather averages over the year.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly hours of sunshine

The average monthly total hours of sunshine over the year
* Data from: Seattle, the United States of America (21 KM, 13 Miles).

Daily percent of sunshine

The mean percent of hours of sunhours during the day over the year
* Data from: Seattle, the United States of America (21 KM, 13 Miles).

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average humidity

The mean monthly relative humidity over the year
* Data from: Seattle, the United States of America (21 KM, 13 Miles).

Average wind speed

The mean monthly wind speed over the year (in meters per second)
* Data from: Seattle, the United States of America (21 KM, 13 Miles).

Weather Forecasts for Issaquah (WA)

Thu   Apr 25
14°C | 9°C
S 14 km/h
23 mm
broken clouds and rain

broken clouds and rain

hourly forecast
Fri   Apr 26
16°C | 10°C
W 11 km/h
1.9 mm
broken clouds and slight rain

broken clouds and slight rain

hourly forecast
Sat   Apr 27
13°C | 9°C
S 14 km/h
7.5 mm
overcast and heavy rain

overcast and heavy rain

hourly forecast
5-Day Forecast 10-Day Forecast

The best time of year to visit Issaquah in the United States of America

During the months of July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:

  • Which months have the greatest rainfall in Issaquah?
    Most rainfall (rainy season) is seen in January, March, November and December.
  • Which is the warmest month in Issaquah?
    July has an average maximum temperature of 24°C and is the warmest month of the year.
  • Which is the coldest month in Issaquah?
    The coldest month is December with an average maximum temperature of 6°C.
  • Which is the wettest month in Issaquah?
    November tops the wettest month list with 237 mm of rainfall.
  • Which is the driest month in Issaquah?
    July is the driest month with 25 mm of precipitation.
  • Which is the sunniest month in Issaquah?
    July is the sunniest month with an average of 312 hours of sunshine.

    • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

     

     

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