– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 pm Mon 21 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Mon 21 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–4 Weather SummarySome drizzle, heaviest during Tue morning. Very mild (max 11°C on Mon night, min 6°C on Tue night). Wind will be generally light. | Days 5–7 Weather SummaryHeavy rain (total 24mm), heaviest during Fri morning. Very mild (max 10°C on Sat afternoon, min 3°C on Fri morning). Winds decreasing (fresh winds from the SSW on Thu night, calm by Sat night). | |||||||||||||||
Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  |  | |  | |  |  | |  | | |  | |
some clouds | rain shwrs | rain shwrs | clear | cloudy | clear | some clouds | some clouds | cloudy | mod. rain | heavy rain | rain shwrs | rain shwrs | clear | some clouds | light rain | |
Cloud base (m) | 450 | 500 | 2150 | 2050 | 6200 | 3250 | 2800 | 400 | 450 | 550 | 4250 | 5750 | ||||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | 0.4 | 0.6 | — | — | — | — | — | — | 6 | 13 | 2 | 0.3 | — | — | 0.1 |
max °C | 11 | 7 | 9 | 8 | 7 | 9 | 9 | 11 | 11 | 7 | 4 | 5 | 5 | 8 | 10 | 10 |
min °C | 8 | 7 | 8 | 6 | 7 | 8 | 7 | 10 | 9 | 6 | 3 | 4 | 4 | 5 | 10 | 5 |
chill °C | 7 | 6 | 7 | 4 | 5 | 8 | 7 | 9 | 9 | 2 | 0 | 1 | 4 | 4 | 9 | 5 |
Freezing level m | 3650 | 3450 | 3100 | 2700 | 2900 | 3000 | 3350 | 2900 | 2900 | 2500 | 1800 | 2000 | 2150 | 2550 | 2750 | 2300 |
 | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — |
 | — | — | 7:05 | — | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — | — | 6:57 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Some drizzle, heaviest during Tue morning. Very mild (max 11°C on Mon night, min 6°C on Tue night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Heavy rain (total 24mm), heaviest during Fri morning. Very mild (max 10°C on Sat afternoon, min 3°C on Fri morning). Winds decreasing (fresh winds from the SSW on Thu night, calm by Sat 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 |
|---|---|---|---|---|---|
 | |||||
| |||||
SHIP6699 | |||||
SHIP6021 | |||||
SHIP12190 | |||||
SHIP3607 | |||||
SHIP3973 | |||||
SHIP4899 |
* 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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