– Lat/Long: 47.51° N 121.74° W
Mount Si
Weather Forecast, United StatesIssued: 3 am Sun 09 Nov Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Sun 09 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Sun 09 Nov Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryModerate rain (total 11mm), heaviest on Mon morning. Freeze-thaw conditions (max 14°C on Sun morning, min 0°C on Mon night). Winds decreasing (fresh winds from the SW on Mon afternoon, calm by Tue morning). | Days 4–6 Weather SummaryMild at first with light rain (total 10mm) on Wed afternoon followed by colder weather and light fall of snow, heaviest on Thu morning. Freeze-thaw conditions (max 8°C on Wed night, min -3°C on Thu afternoon). Winds decreasing (near gales from the SW on Thu morning, calm by Fri morning). | |||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  |  | |  | |  |  | |  | | |  | |
some clouds | some clouds | light rain | mod. rain | light rain | some clouds | clear | cloudy | some clouds | rain shwrs | light rain | mod. rain | light snow | light snow | mod. snow | some clouds | some clouds | cloudy | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | 3 | 2 | 6 | — | — | — | |
— | — | 3 | 6 | 1.5 | — | — | — | — | 0.4 | 4 | 5 | — | — | — | — | — | — | |
max°C | 14 | 13 | 11 | 6 | 4 | 2 | 4 | 5 | 5 | 7 | 7 | 8 | -2 | -2 | -3 | -3 | -3 | -3 |
min°C | 14 | 12 | 7 | 5 | 3 | 0 | 3 | 5 | 5 | 5 | 7 | 3 | -2 | -3 | -3 | -3 | -3 | -3 |
13 | 10 | 3 | 0 | -3 | -4 | 1 | 4 | 3 | 2 | 3 | -3 | -11 | -12 | -12 | -6 | -5 | -5 | |
3800 | 3650 | 3400 | 2550 | 2150 | 1350 | 2250 | 2600 | 2300 | 2300 | 2450 | 2400 | 1000 | 1050 | 850 | 850 | 900 | 750 | |
Cloud base (m) | 8550 | 9300 | 5550 | 600 | 650 | 900 | 850 | 6150 | 5150 | 2200 | 800 | 350 | 650 | 450 | 350 | 400 | 400 | 500 |
 | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — |
 | — | 4:37 | — | — | 4:36 | — | — | 4:35 | — | — | 4:34 | — | — | 4:31 | — | — | 4:30 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Moderate rain (total 11mm), heaviest on Mon morning. Freeze-thaw conditions (max 14°C on Sun morning, min 0°C on Mon night). Winds decreasing (fresh winds from the SW on Mon afternoon, calm by Tue morning).
Mount Si Weather (Days 3-6):
Mild at first with light rain (total 10mm) on Wed afternoon followed by colder weather and light fall of snow, heaviest on Thu morning. Freeze-thaw conditions (max 8°C on Wed night, min -3°C on Thu afternoon). Winds decreasing (near gales from the SW on Thu morning, calm by Fri 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 |
|---|---|---|---|---|---|
 | |||||
| |||||
SHIP7024 | |||||
SHIP3994 | |||||
SHIP8474 | |||||
SHIP3213 | |||||
SHIP4992 |
* 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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