– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 am Sat 26 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Sat 26 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Mild temperatures (max 9°C on Sun afternoon, min 3°C on Sat morning). Winds increasing (calm on Sun afternoon, fresh winds from the SW by Mon night). | Days 4–6 Weather SummaryHeavy rain (total 37mm), heaviest during Thu afternoon. Very mild (max 12°C on Wed night, min 2°C on Thu night). Winds decreasing (fresh winds from the SW on Tue afternoon, calm by Wed night). | |||||||||||||||||
Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 1 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | | | |  |  | |  | | | | |  |  | |
rain shwrs | some clouds | some clouds | cloudy | clear | some clouds | some clouds | clear | cloudy | light rain | light rain | light rain | light rain | light rain | light rain | light rain | heavy rain | heavy rain | |
Cloud base (m) | 6700 | 6100 | 8100 | 2450 | 900 | 550 | 400 | 400 | 650 | 850 | 750 | 400 | 400 | |||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.1 | — | — | — | — | — | — | — | — | 0.5 | 0.8 | 2 | 2 | 0.1 | 0.2 | 2 | 15 | 13 |
max °C | 4 | 6 | 7 | 8 | 9 | 8 | 7 | 8 | 7 | 8 | 8 | 10 | 10 | 11 | 12 | 10 | 9 | 7 |
min °C | 3 | 6 | 6 | 7 | 9 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 9 | 10 | 11 | 10 | 8 | 2 |
chill °C | 3 | 4 | 5 | 6 | 9 | 5 | 5 | 6 | 4 | 4 | 4 | 4 | 6 | 8 | 11 | 7 | 5 | -3 |
Freezing level m | 2000 | 2450 | 2750 | 2700 | 2750 | 2850 | 2800 | 2950 | 3350 | 3450 | 3300 | 3150 | 3200 | 3250 | 3100 | 3000 | 2750 | 1700 |
 | 6:58 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — |
 | — | 6:57 | — | — | 6:54 | — | — | 6:52 | — | — | 6:51 | — | — | 6:49 | — | — | 6:46 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Mostly dry. Mild temperatures (max 9°C on Sun afternoon, min 3°C on Sat morning). Winds increasing (calm on Sun afternoon, fresh winds from the SW by Mon night).
Mount Si Weather (Days 3-6):
Heavy rain (total 37mm), heaviest during Thu afternoon. Very mild (max 12°C on Wed night, min 2°C on Thu night). Winds decreasing (fresh winds from the SW on Tue afternoon, calm by Wed 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 |
|---|---|---|---|---|---|
 | |||||
SHIP10708 | |||||
SHIP8466 | |||||
SHIP3806 | |||||
SHIP6983 | |||||
SHIP9842 | |||||
SHIP4052 |
* 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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