Seattle
Washington, USA
Long-term weather forecast
Long-term weather forecast

July weather forecast and Climate
Seattle, WA

July is the driest month in Seattle with only five days of rain and the lowest precipitation of 0.9" (22.9mm) as well as the least humid at 64.8%. The sunshine hours are the highest in July averaging ten. The sea temperature that is 57.2°F (14°C). The month records the highest tourist numbers all year.
Temperatures are the most pleasant in the range of 55.4°F (13°C) and 73.4°F (23°C) and touring Seattle becomes most comfortable, especially with sixteen hours of daylight that allow for participation in the summer festivities late into the night.
  • The average high temperature in July: 24.3°C

The warmest month (with the highest average high temperature) is August (24.6°C).
The month with the lowest average high temperature is December (7.6°C).

  • The average low temperature in July: 13.1°C

The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is December (2°C).

  • The average humidity in July: 65.4%

The month with the highest relative humidity is December (80.1%).
The month with the lowest relative humidity is July (65.4%).

  • The average rainfall in July: 17.8mm

The wettest month (with the highest rainfall) is November (166.9mm).
The driest month (with the lowest rainfall) is July (17.8mm).

  • The average rainfall days in July: 5 days

The month with the highest number of rainy days is November (18.4 days).
The month with the lowest number of rainy days is August (4.8 days).

  • The average snowfall in July: 0mm

Months with the highest snowfall are February and December (43.2mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

  • The average snowfall days in July: 0 days

The month with the highest number of snowfall days is December (1.6 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

  • The average daylight in July: 16h

Months with the longest days are June and July (Average daylight: 16h).
The month with shortest days is December (Average daylight: 8h).

  • The average sunshine in July: 10.1h

The month with most sunshine is July (Average sunshine: 10.1h).
The month with least sunshine is December (Average sunshine: 1.7h).

  • The average UV index in July: 7

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, November and December (UV index 1).

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