– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 pm Tue 20 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Tue 20 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Very mild (max 19°C on Wed afternoon, min 5°C on Thu night). Wind will be generally light. | Days 5–7 Weather SummaryLight rain (total 9mm), mostly falling on Sun morning. Very mild (max 11°C on Sat afternoon, min 2°C on Mon morning). Wind will be generally light. | |||||||||||||||
Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | | | |  |  |  | | | | |  |  | | | |
clear | clear | clear | clear | clear | some clouds | rain shwrs | rain shwrs | rain shwrs | clear | some clouds | some clouds | some clouds | light rain | light rain | rain shwrs | |
Cloud base (m) | 8750 | 8800 | 8550 | 8150 | 750 | 650 | 550 | 500 | 5600 | 3000 | 2050 | 450 | 450 | 600 | ||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | 0.1 | 0.1 | 0.1 | — | — | — | — | 4 | 4 | 0.5 |
max °C | 13 | 17 | 19 | 13 | 12 | 12 | 8 | 6 | 7 | 6 | 9 | 11 | 7 | 6 | 5 | 5 |
min °C | 12 | 12 | 17 | 11 | 10 | 11 | 5 | 5 | 6 | 5 | 5 | 10 | 6 | 6 | 5 | 3 |
chill °C | 11 | 12 | 17 | 11 | 10 | 10 | 3 | 3 | 6 | 5 | 5 | 10 | 6 | 6 | 5 | 1 |
Freezing level m | 3150 | 3050 | 3200 | 3200 | 2950 | 2400 | 1650 | 1400 | 2350 | 2400 | 2650 | 2350 | 2250 | 1600 | 1350 | 1400 |
 | — | 7:33 | — | — | 7:35 | — | — | 7:35 | — | — | 7:37 | — | — | 7:39 | — | — |
 | — | — | 6:07 | — | — | 6:06 | — | — | 6:05 | — | — | 6:02 | — | — | 6:00 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Wed afternoon, min 5°C on Thu night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Light rain (total 9mm), mostly falling on Sun morning. Very mild (max 11°C on Sat afternoon, min 2°C on Mon 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 |
|---|---|---|---|---|---|
 | |||||
| |||||
SeattleS.-Tacoma-Wa. | |||||
Seattl / oeing Airport | | ||||
| |||||
BUOY-EBSW1 |
* 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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