Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 3mm), mostly falling on Tue afternoon. Very mild (max 14°C on Thu afternoon, min 1°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 4mm) at first, then becoming colder with a dusting of snow on Sat morning. Freeze-thaw conditions (max 11°C on Fri 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.