– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 am Thu 24 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Thu 24 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryHeavy rain (total 35mm), heaviest during Fri afternoon. Very mild (max 13°C on Thu morning, min 2°C on Fri night). Winds decreasing (strong winds from the WSW on Fri afternoon, calm by Sat night). | Days 4–6 Weather SummaryHeavy rain (total 28mm), heaviest during Tue night. Mild temperatures (max 7°C on Sun afternoon, min 3°C on Mon morning). Winds increasing (calm on Sun morning, near gales from the SW by Tue afternoon). | |||||||||||||||||
Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  | | |  | |  |  |  | | |  | |  | |
some clouds | some clouds | light rain | rain shwrs | heavy rain | heavy rain | rain shwrs | some clouds | cloudy | some clouds | clear | some clouds | mod. rain | rain shwrs | light rain | light rain | light rain | rain shwrs | |
Cloud base (m) | 3000 | 700 | 800 | 450 | 550 | 750 | 6300 | 5350 | 7300 | 2300 | 450 | 650 | 650 | 400 | 650 | 450 | ||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | 4 | 4 | 17 | 11 | 0.1 | — | — | — | — | — | 8 | 1.9 | 1.6 | 4 | 0.9 | 12 |
max °C | 13 | 13 | 12 | 7 | 6 | 4 | 4 | 6 | 6 | 6 | 7 | 5 | 4 | 5 | 5 | 6 | 7 | 7 |
min °C | 11 | 13 | 8 | 7 | 4 | 2 | 2 | 6 | 6 | 6 | 6 | 4 | 3 | 5 | 5 | 5 | 6 | 4 |
chill °C | 10 | 12 | 4 | 4 | -2 | -3 | 0 | 4 | 5 | 6 | 5 | 1 | 0 | 1 | 0 | -1 | 0 | 2 |
Freezing level m | 3400 | 3400 | 2700 | 2350 | 1950 | 1650 | 1850 | 2250 | 2450 | 2300 | 2250 | 2100 | 1950 | 2050 | 2250 | 3150 | 2850 | 2100 |
 | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — |
 | — | 7:00 | — | — | 6:59 | — | — | 6:57 | — | — | 6:54 | — | — | 6:52 | — | — | 6:51 | — |
Loading...
Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Heavy rain (total 35mm), heaviest during Fri afternoon. Very mild (max 13°C on Thu morning, min 2°C on Fri night). Winds decreasing (strong winds from the WSW on Fri afternoon, calm by Sat night).
Mount Si Weather (Days 3-6):
Heavy rain (total 28mm), heaviest during Tue night. Mild temperatures (max 7°C on Sun afternoon, min 3°C on Mon morning). Winds increasing (calm on Sun morning, near gales from the SW by Tue afternoon).
This table gives the weather forecast for Mount Si at the specific elevation of 1270 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 | |||||
SHIP7373 | |||||
SHIP5265 | |||||
* 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.
Mount Si Photos
View all
Cascade Range photos (454) |
Pacific Coast Ranges photos (1063) |
photos from mountains in United States (3070) |
all photos
Upload new photo
Upload new photoSunset on the Summit
Mt Si
Mount Si