– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 pm Thu 08 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Thu 08 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–4 Weather SummaryLight rain (total 6mm), mostly falling on Fri morning. Freeze-thaw conditions (max 14°C on Thu night, min 0°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, calm by Sat morning). | Days 5–7 Weather SummarySome drizzle, heaviest during Wed morning. Mild temperatures (max 9°C on Tue afternoon, min 5°C on Sun night). Wind will be generally light. | |||||||||||||||
Friday 9 | Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  |  |  |  | | | | |  | | | | |
rain shwrs | light rain | light rain | cloudy | some clouds | rain shwrs | clear | clear | clear | clear | clear | clear | some clouds | some clouds | clear | some clouds | |
Cloud base (m) | 9250 | 400 | 500 | 400 | 500 | 850 | 1700 | 2500 | 6800 | 8250 | 2900 | |||||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.1 | 3 | 3 | — | — | 0.1 | — | — | — | — | — | — | — | — | — | — |
max °C | 14 | 7 | 4 | 2 | 1 | 3 | 3 | 5 | 6 | 6 | 6 | 8 | 8 | 8 | 9 | 7 |
min °C | 8 | 6 | 3 | 0 | 0 | 2 | 3 | 3 | 5 | 5 | 5 | 7 | 7 | 8 | 8 | 6 |
chill °C | 3 | 1 | 1 | -4 | -2 | 2 | 1 | 2 | 5 | 5 | 5 | 7 | 7 | 8 | 7 | 5 |
Freezing level m | 3750 | 2300 | 1750 | 1450 | 1350 | 1650 | 1850 | 2050 | 2250 | 2800 | 3450 | 3450 | 3500 | 3400 | 3250 | 2800 |
 | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:20 | — | — | 7:22 | — | — |
 | — | — | 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 6mm), mostly falling on Fri morning. Freeze-thaw conditions (max 14°C on Thu night, 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):
Some drizzle, heaviest during Wed morning. Mild temperatures (max 9°C on Tue afternoon, min 5°C on Sun night). Wind will be generally light.
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 |
|---|---|---|---|---|---|
 | |||||
| |||||
SHIP3665 | |||||
SHIP8641 | |||||
SHIP11293 | |||||
SHIP6748 | |||||
SHIP8113 | |||||
SHIP6203 | |||||
SHIP4505 |
* 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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