– Lat/Long: 47.51° N 121.74° W
Mount Si
Weather Forecast, United StatesIssued: 9 pm Tue 30 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Tue 30 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Tue 30 Dec Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–4 Weather SummaryA dusting of snow giving way to moderate rain (total 18mm) heaviest on Fri morning. Mild temperatures (max 8°C on Tue night, min 2°C on Thu night). Winds increasing (calm on Wed morning, fresh winds from the SW by Fri afternoon). | Days 5–7 Weather SummaryLight rain (total 6mm) at first, then becoming colder with a dusting of snow on Sun night. Mild temperatures (max 6°C on Fri night, min 1°C on Sun night). Winds decreasing (fresh winds from the SE on Sun morning, calm by Mon morning). | ||||||||||||||||||
Wednesday 31 | Thursday 1 | Friday 2 | Saturday 3 | Sunday 4 | Monday 5 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  |  |  |  | |  |  | |  | | | | | | | |
clear | clear | clear | some clouds | cloudy | light rain | light snow | mod. rain | light rain | rain shwrs | rain shwrs | rain shwrs | light rain | light rain | light rain | light snow | cloudy | rain shwrs | some clouds | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | 3 | — | — | — | |
— | — | — | — | — | 0.1 | 7 | 7 | 4 | 0.2 | 0.9 | 0.7 | 0.7 | 0.5 | 2 | 0.4 | — | 0.1 | — | |
max °C | 8 | 8 | 8 | 7 | 6 | 5 | 3 | 2 | 3 | 6 | 5 | 4 | 6 | 6 | 3 | 3 | 1 | 3 | 4 |
min °C | 6 | 8 | 7 | 6 | 6 | 3 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 3 | 1 | 1 | 3 | 1 |
6 | 7 | 7 | 5 | 5 | 3 | 0 | -4 | -3 | 0 | -1 | 0 | 0 | 0 | -1 | -3 | 1 | 3 | -4 | |
3350 | 3250 | 3200 | 3150 | 2750 | 2150 | 2100 | 1800 | 1950 | 2000 | 2000 | 1800 | 1950 | 2050 | 1700 | 1550 | 1450 | 1700 | 1900 | |
Cloud base (m) | 6400 | 5900 | 8950 | 5600 | 2950 | 450 | 400 | 400 | 550 | 1450 | 1600 | 1400 | 1700 | 700 | 400 | 450 | |||
 | — | 7:54 | — | — | 7:54 | — | — | 7:54 | — | — | 7:54 | — | — | 7:54 | — | — | 7:54 | — | — |
 | — | — | 4:24 | — | — | 4:25 | — | — | 4:27 | — | — | 4:28 | — | — | 4:29 | — | — | 4:30 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: A dusting of snow giving way to moderate rain (total 18mm) heaviest on Fri morning. Mild temperatures (max 8°C on Tue night, min 2°C on Thu night). Winds increasing (calm on Wed morning, fresh winds from the SW by Fri afternoon).
Mount Si Weather (Days 3-6):
Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Sun night. Mild temperatures (max 6°C on Fri night, min 1°C on Sun night). Winds decreasing (fresh winds from the SE on Sun morning, calm by Mon morning).
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 |
|---|---|---|---|---|---|
 | |||||
| |||||
SHIP4036 | |||||
SHIP7161 | |||||
SHIP6253 | |||||
SHIP8839 | |||||
SHIP4167 |
* 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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