– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 pm Sun 25 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Sun 25 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–4 Weather SummaryHeavy rain (total 28mm), heaviest during Wed morning. Mild temperatures (max 9°C on Mon afternoon, min 5°C on Tue night). Wind will be generally light. | Days 5–7 Weather SummaryLight rain (total 8mm), mostly falling on Thu night. Mild temperatures (max 9°C on Thu afternoon, min 3°C on Thu night). Wind will be generally light. | |||||||||||||||
Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  | |  | |  | |  | | | | | |  | |
rain shwrs | light rain | light rain | mod. rain | light rain | rain shwrs | mod. rain | mod. rain | light rain | light rain | rain shwrs | rain shwrs | light rain | rain shwrs | rain shwrs | some clouds | |
Cloud base (m) | 950 | 400 | 600 | 400 | 400 | 550 | 400 | 400 | 550 | 750 | 600 | 900 | 600 | 600 | 750 | 2550 |
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.6 | 1.2 | 1.4 | 6 | 1.7 | 1.9 | 8 | 6 | 1.4 | 1.7 | 0.3 | 0.4 | 5 | 0.3 | 0.3 | — |
max °C | 8 | 8 | 9 | 7 | 7 | 7 | 6 | 5 | 7 | 5 | 7 | 9 | 5 | 6 | 7 | 4 |
min °C | 7 | 7 | 8 | 7 | 7 | 6 | 5 | 5 | 6 | 4 | 4 | 8 | 3 | 4 | 7 | 4 |
chill °C | 6 | 7 | 8 | 7 | 6 | 2 | 2 | 3 | 5 | 4 | 2 | 7 | 1 | 4 | 7 | 2 |
Freezing level m | 2000 | 1750 | 1650 | 1600 | 1450 | 1350 | 1350 | 1250 | 1300 | 1250 | 1400 | 1550 | 1200 | 1250 | 1400 | 1500 |
 | — | 7:41 | — | — | 7:41 | — | — | 7:43 | — | — | 7:45 | — | — | 7:47 | — | — |
 | — | — | 5:59 | — | — | 5:58 | — | — | 5:55 | — | — | 5:53 | — | — | 5:52 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Heavy rain (total 28mm), heaviest during Wed morning. Mild temperatures (max 9°C on Mon afternoon, min 5°C on Tue night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Light rain (total 8mm), mostly falling on Thu night. Mild temperatures (max 9°C on Thu afternoon, min 3°C on Thu 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 |
|---|---|---|---|---|---|
 | |||||
 | |||||
SHIP5738 | |||||
SHIP7007 | |||||
SHIP8153 | |||||
SHIP8465 | |||||
SHIP7766 | |||||
* 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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