– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 pm Mon 12 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Mon 12 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–4 Weather SummarySome drizzle, heaviest during Wed morning. Very mild (max 18°C on Thu morning, min 7°C on Mon night). Wind will be generally light. | Days 5–7 Weather SummaryLight rain (total 6mm), mostly falling on Sat morning. Warm (max 22°C on Fri afternoon, min 7°C on Sun morning). Wind will be generally light. | ||||||||||||||||
Mon 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | Friday 16 | Saturday 17 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  | | | | | |  |  | | | |
clear | some clouds | cloudy | some clouds | light rain | light rain | some clouds | clear | clear | clear | clear | clear | clear | rain shwrs | rain shwrs | rain shwrs | rain shwrs | |
Cloud base (m) | 2550 | 2150 | 1950 | 900 | 500 | 750 | 9250 | 8950 | 500 | 900 | 2050 | ||||||
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | 0.4 | 0.7 | — | — | — | — | — | — | — | 0.2 | 4 | 0.4 | 0.9 |
max °C | 12 | 9 | 10 | 12 | 11 | 12 | 15 | 13 | 18 | 21 | 14 | 20 | 22 | 15 | 12 | 13 | 11 |
min °C | 11 | 7 | 9 | 11 | 10 | 11 | 13 | 11 | 11 | 20 | 14 | 14 | 20 | 12 | 11 | 12 | 8 |
chill °C | 11 | 7 | 9 | 11 | 10 | 11 | 13 | 10 | 10 | 20 | 14 | 14 | 20 | 11 | 10 | 12 | 8 |
Freezing level m | 2850 | 2950 | 2800 | 2750 | 2750 | 3250 | 3600 | 3850 | 3850 | 3850 | 3950 | 4000 | 3800 | 3250 | 2300 | 2450 | 2300 |
 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:28 | — | — |
 | 6:24 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — | — | 6:16 | — | — | 6:15 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Some drizzle, heaviest during Wed morning. Very mild (max 18°C on Thu morning, min 7°C on Mon night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Light rain (total 6mm), mostly falling on Sat morning. Warm (max 22°C on Fri afternoon, min 7°C on Sun 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.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
 | |||||
SHIP4941 | |||||
SHIP9656 | |||||
SHIP6815 | |||||
SHIP3979 | |||||
SHIP10011 | |||||
SHIP4635 |
* 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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