– Lat/Long: 47.51° N 121.74° W
Mount Si
Weather Forecast, United StatesIssued: 10 am Fri 17 Oct Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Fri 17 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Fri 17 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryHeavy rain (total 47mm), heaviest during Sat night. Very mild (max 10°C on Fri afternoon, min 6°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the SW by Sun morning). | Days 4–6 Weather SummaryModerate rain (total 15mm), heaviest on Wed night. Very mild (max 14°C on Wed afternoon, min 7°C on Mon morning). Wind will be generally light. | |||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | |  |  | |  | | | | | | | | |
light rain | rain shwrs | some clouds | cloudy | light rain | heavy rain | light rain | mod. rain | mod. rain | rain shwrs | some clouds | some clouds | some clouds | rain shwrs | some clouds | some clouds | cloudy | heavy rain | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
1.2 | 0.6 | — | — | 2 | 26 | 4 | 7 | 6 | 0.7 | — | — | — | 0.1 | — | — | — | 14 | |
max°C | 9 | 10 | 8 | 10 | 9 | 9 | 7 | 8 | 8 | 9 | 10 | 9 | 9 | 10 | 9 | 12 | 14 | 10 |
min°C | 9 | 9 | 6 | 7 | 7 | 7 | 7 | 8 | 7 | 7 | 10 | 7 | 7 | 10 | 7 | 8 | 12 | 8 |
7 | 9 | 6 | 7 | 5 | 3 | 3 | 4 | 5 | 6 | 10 | 7 | 6 | 9 | 7 | 7 | 12 | 5 | |
1700 | 1900 | 2550 | 3150 | 2850 | 2050 | 1550 | 1700 | 1650 | 1750 | 2700 | 2500 | 2150 | 2550 | 2800 | 2800 | 2700 | 2550 | |
Cloud base (m) | 450 | 600 | 1600 | 2800 | 2100 | 400 | 450 | 400 | 450 | 700 | 1550 | 3000 | 2100 | 850 | 5100 | 5400 | 5550 | 1800 |
 | 7:28 | — | — | 7:28 | — | — | 7:30 | — | — | 7:31 | — | — | 7:33 | — | — | 7:35 | — | — |
 | — | 6:15 | — | — | 6:14 | — | — | 6:12 | — | — | 6:09 | — | — | 6:07 | — | — | 6:06 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Heavy rain (total 47mm), heaviest during Sat night. Very mild (max 10°C on Fri afternoon, min 6°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the SW by Sun morning).
Mount Si Weather (Days 3-6):
Moderate rain (total 15mm), heaviest on Wed night. Very mild (max 14°C on Wed afternoon, min 7°C on Mon morning). Wind will be generally light.
This table gives the weather forecast for Mount Si at the specific elevation of 500 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 |
|---|---|---|---|---|---|
 | |||||
 | |||||
SHIP8589 | |||||
SHIP7845 | |||||
SHIP7031 | |||||
SHIP3633 | |||||
SHIP4209 | |||||
SHIP9306 |
* 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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