Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 12°C on Thu afternoon, min 6°C on Wed afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Mild temperatures (max 9°C on Sat afternoon, min 2°C on Sat night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 1270 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of Mount Si. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.