– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 am Sun 25 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Sun 25 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryHeavy rain (total 20mm), heaviest during Tue night. Mild temperatures (max 9°C on Sun afternoon, min 4°C on Tue night). Wind will be generally light. | Days 4–6 Weather SummaryModerate rain (total 18mm), heaviest on Wed morning. Mild temperatures (max 8°C on Thu afternoon, min 3°C on Fri morning). Wind will be generally light. | |||||||||||||||||
Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  | | |  | | | | | |  |  | | | |
light rain | light rain | cloudy | cloudy | rain shwrs | light rain | rain shwrs | rain shwrs | mod. rain | light rain | light rain | light rain | rain shwrs | light rain | rain shwrs | some clouds | rain shwrs | rain shwrs | |
Cloud base (m) | 2100 | 900 | 2250 | 2400 | 750 | 400 | 550 | 650 | 400 | 400 | 550 | 800 | 550 | 1600 | 400 | 650 | 700 | 1800 |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 2 | 3 | — | — | 0.1 | 4 | 1 | 0.7 | 9 | 5 | 3 | 3 | 0.5 | 1.2 | 4 | — | 0.5 | 0.1 |
max °C | 8 | 9 | 8 | 8 | 9 | 7 | 7 | 7 | 6 | 6 | 7 | 5 | 7 | 8 | 4 | 6 | 7 | 5 |
min °C | 7 | 9 | 6 | 6 | 8 | 6 | 6 | 6 | 4 | 4 | 6 | 4 | 4 | 7 | 4 | 3 | 6 | 3 |
chill °C | 5 | 7 | 6 | 6 | 7 | 6 | 4 | 4 | 0 | 1 | 5 | 3 | 2 | 7 | 4 | 1 | 6 | 1 |
Freezing level m | 2050 | 2100 | 2100 | 1800 | 1550 | 1550 | 1400 | 1400 | 1250 | 1300 | 1300 | 1250 | 1500 | 1400 | 1250 | 1250 | 1300 | 1550 |
 | 7:39 | — | — | 7:41 | — | — | 7:41 | — | — | 7:43 | — | — | 7:45 | — | — | 7:47 | — | — |
 | — | 6:00 | — | — | 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 20mm), heaviest during Tue night. Mild temperatures (max 9°C on Sun afternoon, min 4°C on Tue night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Moderate rain (total 18mm), heaviest on Wed morning. Mild temperatures (max 8°C on Thu afternoon, min 3°C on Fri morning). 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.
* 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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