– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 3 am Wed 11 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Wed 11 Nov Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryModerate rain (total 12mm), heaviest on Fri night. Very mild (max 13°C on Wed morning, min 3°C on Fri night). Winds decreasing (near gales from the SE on Thu night, calm by Fri night). | Days 4–6 Weather SummaryHeavy rain (total 31mm), heaviest during Sat night. Later becoming colder with a dusting of snow on Sun night. Freeze-thaw conditions (max 5°C on Sat night, min 0°C on Mon night). Winds decreasing (fresh winds from the S on Sat night, calm by Mon night). | |||||||||||||||||
Wednesday 11 | Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  | |  |  |  | |  |  | |  | |  | | |
some clouds | some clouds | some clouds | cloudy | cloudy | cloudy | cloudy | light rain | rain shwrs | rain shwrs | light rain | heavy rain | mod. rain | light rain | snow shwrs | some clouds | clear | some clouds | |
Cloud base (m) | 6600 | 6750 | 6200 | 6400 | 5800 | 6300 | 5150 | 2000 | 350 | 650 | 600 | 850 | 450 | 400 | 400 | 850 | 2350 | 750 |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
mm | — | — | — | — | — | — | — | 1.1 | 11 | 1.5 | 0.6 | 17 | 7 | 4 | — | — | — | — |
max °C | 13 | 12 | 10 | 11 | 13 | 13 | 10 | 7 | 5 | 3 | 4 | 5 | 5 | 3 | 2 | 1 | 1 | 0 |
min °C | 12 | 11 | 9 | 10 | 12 | 11 | 9 | 4 | 3 | 3 | 3 | 3 | 4 | 3 | 1 | 1 | 1 | 0 |
chill °C | 10 | 10 | 8 | 9 | 10 | 7 | 4 | 2 | 3 | 0 | 0 | -2 | 1 | -1 | -4 | -4 | -3 | -2 |
Freezing level m | 3100 | 2950 | 3100 | 2850 | 3000 | 3100 | 2800 | 2350 | 1750 | 1700 | 1700 | 2100 | 2100 | 1800 | 1500 | 1400 | 1450 | 1350 |
 | 7:05 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | 7:13 | — | — |
 | — | 4:35 | — | — | 4:34 | — | — | 4:31 | — | — | 4:30 | — | — | 4:30 | — | — | 4:29 | — |
Loading...
Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Moderate rain (total 12mm), heaviest on Fri night. Very mild (max 13°C on Wed morning, min 3°C on Fri night). Winds decreasing (near gales from the SE on Thu night, calm by Fri night).
Mount Si Weather (Days 3-6):
Heavy rain (total 31mm), heaviest during Sat night. Later becoming colder with a dusting of snow on Sun night. Freeze-thaw conditions (max 5°C on Sat night, min 0°C on Mon night). Winds decreasing (fresh winds from the S on Sat night, calm by Mon night).
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 |
|---|---|---|---|---|---|
 | |||||
| |||||
SHIP12253 | |||||
| |||||
SHIP8826 | |||||
SHIP4450 | |||||
SHIP1515 | |||||
SHIP5252 | |||||
SHIP12599 |
* 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 (3071) |
all photos
Upload new photo
Upload new photoSunset on the Summit
Mt Si
Mount Si