– Lat/Long: 47.51° N 121.74° W
Mount Si
Weather Forecast, United StatesIssued: 9 am Fri 21 Nov Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Fri 21 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Fri 21 Nov Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 5mm) on Sat night. Becoming colder with heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 4°C on Fri night, min -3°C on Sun afternoon). Winds decreasing (strong winds from the SW on Sun morning, light winds from the WNW by Sun night). | Days 4–6 Weather SummaryA light covering of new snow mostly falling on Tue night will be washed away by heavy rain (total 26mm) on Wed afternoon. Freeze-thaw conditions (max 4°C on Wed night, min -3°C on Mon morning). Winds increasing (calm on Mon night, strong winds from the SW by Wed night). | |||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  | |  |  |  |  | | | |  | |  | |
some clouds | cloudy | light rain | cloudy | light rain | light rain | mod. snow | mod. snow | mod. snow | snow shwrs | clear | some clouds | cloudy | cloudy | mod. snow | mod. rain | mod. rain | mod. rain | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | 7 | 8 | 7 | 2 | — | — | — | — | 6 | — | — | — | |
— | — | 0.1 | — | 0.3 | 5 | — | — | — | — | — | — | — | — | — | 8 | 9 | 9 | |
max°C | 3 | 3 | 4 | 4 | 4 | 4 | 2 | -1 | -3 | -2 | -3 | -3 | 0 | 1 | 2 | 3 | 3 | 4 |
min°C | 3 | 3 | 4 | 4 | 4 | 2 | 2 | -3 | -3 | -3 | -3 | -3 | -1 | 1 | -1 | 2 | 3 | 3 |
0 | 0 | 0 | 0 | -1 | -3 | -4 | -9 | -7 | -7 | -6 | -6 | -3 | -2 | -6 | -4 | -3 | -3 | |
1950 | 1800 | 2250 | 2350 | 2050 | 2000 | 1550 | 1050 | 850 | 850 | 900 | 600 | 1100 | 1400 | 1050 | 1900 | 2300 | 2200 | |
Cloud base (m) | 2900 | 2150 | 600 | 700 | 800 | 650 | 400 | 400 | 450 | 550 | 800 | 600 | 2100 | 2700 | 750 | 450 | 400 | 400 |
 | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — |
 | — | 4:23 | — | — | 4:22 | — | — | 4:22 | — | — | 4:22 | — | — | 4:21 | — | — | 4:20 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Light rain (total 5mm) on Sat night. Becoming colder with heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 4°C on Fri night, min -3°C on Sun afternoon). Winds decreasing (strong winds from the SW on Sun morning, light winds from the WNW by Sun night).
Mount Si Weather (Days 3-6):
A light covering of new snow mostly falling on Tue night will be washed away by heavy rain (total 26mm) on Wed afternoon. Freeze-thaw conditions (max 4°C on Wed night, min -3°C on Mon morning). Winds increasing (calm on Mon night, strong winds from the SW by Wed night).
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.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
| |||||
SHIP4031 | |||||
SHIP3481 | |||||
SHIP7503 | |||||
Seattl / oeing Airport | | ||||
|
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.
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