4. Precipitation

Precipitation in millimeters (daily and 15-minute totals) including melted snow and ice. On average, precipitation is distributed evenly throughout the year. However there is considerable variation from day to day and from month to month. Droughts are rare but do occur. Major floods are often associated with heavy rain on snowpack (late winter - early spring) or tropical storms (late summer - early fall). (See all real-time data graphs.)