Because several different germs can cause encephalitis, spread of the infection may take place in different ways. For example, mosquitoes transmit viruses that cause West Nile encephalitis, St. Louis encephalitis, and western equine encephalitis.ncephaliti s may be caused by a variety of viruses, bacteria, and other organisms. These agents include:. 1  Measles, chicken pox, rubella (German measles), mumps, polio, and other viral illnesses, which generally lead to a mild form of encephalitis known as postinfectious or para-infctious encephalitis.
On average, the warmest days of the year in Seattle occur between July 26 and August 8, with average highs of 76 degrees. These are some of the best days to spend on some of Seattle's beaches. Alki Beach Park is open from 6 a.m. until 11 p.m.
Weather in Seattle in June 2017. Check the weather in Seattle in June before you book your next holiday in Washington. Long-term weather averages give the best indication of the weather in June 2017 and includes figure for temperature, sunshine and rainfall for Seattle, Washington, United States. Weather in Seattle in June. The average maximum daytime temperature in Seattle in June is a comfortable 21Â°C (70Â°F). There are usually 9 hours of bright sunshine each day, which represents 55% of the 16 hours of daylight. Expect 41mm (1.6 inches) of rainfall across the whole of June with 9 days with some rain falling.