– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 am Thu 08 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Thu 08 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 5mm) at first, then becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 16°C on Thu morning, min 0°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, calm by Sat morning). | Days 4–6 Weather SummaryLight rain (total 8mm) at first, then becoming colder with a dusting of snow on Tue night. Freeze-thaw conditions (max 8°C on Mon afternoon, min 0°C on Tue night). Winds increasing (calm on Mon morning, near gales from the WSW by Tue night). | |||||||||||||||||
Thursday 8 | Friday 9 | Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  | |  | | | | | |  |  | | | |
clear | clear | rain shwrs | light rain | light rain | light snow | some clouds | some clouds | clear | clear | clear | clear | clear | clear | some clouds | cloudy | light rain | light snow | |
Cloud base (m) | 9050 | 8700 | 500 | 450 | 400 | 500 | 800 | 2350 | 9400 | 5000 | 1900 | 700 | 550 | |||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | 2 |
mm | — | — | 0.4 | 2 | 2 | 0.3 | — | — | — | — | — | — | — | — | — | — | 1.4 | 6 |
max °C | 16 | 16 | 13 | 8 | 3 | 2 | 1 | 3 | 3 | 5 | 6 | 6 | 7 | 8 | 8 | 7 | 7 | 7 |
min °C | 15 | 15 | 7 | 5 | 3 | 0 | 0 | 2 | 3 | 3 | 5 | 5 | 5 | 7 | 8 | 7 | 7 | 0 |
chill °C | 14 | 15 | 2 | 0 | -2 | -4 | -4 | 2 | 1 | 3 | 5 | 5 | 5 | 7 | 7 | 6 | 2 | -5 |
Freezing level m | 4000 | 4050 | 3650 | 2150 | 1800 | 1350 | 1400 | 1650 | 1800 | 1950 | 2250 | 3200 | 3650 | 3500 | 3300 | 2850 | 2650 | 1400 |
 | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:20 | — | — | 7:22 | — | — |
 | — | 6:32 | — | — | 6:30 | — | — | 6:29 | — | — | 6:27 | — | — | 6:24 | — | — | 6:22 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Light rain (total 5mm) at first, then becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 16°C on Thu morning, min 0°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, calm by Sat morning).
Mount Si Weather (Days 3-6):
Light rain (total 8mm) at first, then becoming colder with a dusting of snow on Tue night. Freeze-thaw conditions (max 8°C on Mon afternoon, min 0°C on Tue night). Winds increasing (calm on Mon morning, near gales from the WSW by Tue 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 |
|---|---|---|---|---|---|
 | |||||
 | |||||
Seattl / oeing Airport | | ||||
| |||||
BUOY-EBSW1 | |||||
SHIP12320 |
* 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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