– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 pm Thu 24 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Thu 24 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–4 Weather SummaryHeavy rain (total 36mm), heaviest during Fri afternoon. Very mild (max 14°C on Fri morning, min 7°C on Fri night). Wind will be generally light. | Days 5–7 Weather SummaryModerate rain (total 18mm), heaviest on Tue afternoon. Very mild (max 14°C on Mon afternoon, min 7°C on Sun night). Wind will be generally light. | |||||||||||||||
Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  |  |  |  | | | |  | | | |
mod. rain | rain shwrs | heavy rain | rain shwrs | rain shwrs | cloudy | cloudy | some clouds | clear | clear | some clouds | clear | cloudy | light rain | heavy rain | rain shwrs | |
Cloud base (m) | 400 | 800 | 650 | 750 | 7000 | 5200 | 4950 | 6850 | 7100 | 2450 | 1650 | 400 | 450 | |||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 6 | 5 | 18 | 7 | 0.1 | — | — | — | — | — | — | — | — | 1.8 | 11 | 5 |
max °C | 13 | 14 | 10 | 8 | 10 | 12 | 9 | 12 | 14 | 10 | 12 | 14 | 12 | 12 | 12 | 12 |
min °C | 12 | 12 | 9 | 7 | 7 | 12 | 8 | 9 | 14 | 7 | 8 | 14 | 11 | 10 | 11 | 8 |
chill °C | 12 | 12 | 6 | 5 | 7 | 12 | 8 | 9 | 14 | 7 | 8 | 14 | 11 | 8 | 10 | 7 |
Freezing level m | 2750 | 2350 | 2100 | 1600 | 1950 | 2350 | 2550 | 2550 | 2600 | 2800 | 3000 | 2900 | 3200 | 2900 | 2900 | 1900 |
 | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — |
 | — | — | 6:59 | — | — | 6:57 | — | — | 6:54 | — | — | 6:52 | — | — | 6:51 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Heavy rain (total 36mm), heaviest during Fri afternoon. Very mild (max 14°C on Fri morning, min 7°C on Fri night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Moderate rain (total 18mm), heaviest on Tue afternoon. Very mild (max 14°C on Mon afternoon, min 7°C on Sun night). 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 |
|---|---|---|---|---|---|
 | |||||
Seattl / oeing Airport | | ||||
| |||||
BUOY-EBSW1 | |||||
BUOY-WPOW1 |
* 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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