– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 am Fri 16 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Fri 16 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Warm (max 23°C on Fri afternoon, min 5°C on Sat night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Very mild (max 12°C on Wed afternoon, min 5°C on Mon night). Wind will be generally light. | |||||||||||||||||
Friday 16 | Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  | |  |  | |  |  | | | | | | | |
clear | clear | rain shwrs | light rain | rain shwrs | clear | clear | some clouds | cloudy | some clouds | cloudy | some clouds | clear | some clouds | clear | clear | clear | some clouds | |
Cloud base (m) | 9400 | 8600 | 600 | 7050 | 4300 | 4200 | 2950 | 1700 | 1550 | 7800 | ||||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | 2 | 1.4 | 0.4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 20 | 23 | 15 | 11 | 10 | 7 | 10 | 12 | 9 | 10 | 11 | 8 | 8 | 9 | 6 | 10 | 12 | 8 |
min °C | 14 | 21 | 12 | 9 | 9 | 5 | 5 | 11 | 8 | 8 | 10 | 5 | 5 | 9 | 6 | 6 | 12 | 7 |
chill °C | 14 | 21 | 10 | 8 | 8 | 4 | 4 | 11 | 8 | 8 | 10 | 5 | 5 | 8 | 6 | 5 | 12 | 7 |
Freezing level m | 4000 | 3800 | 3200 | 1950 | 1950 | 2150 | 2700 | 2950 | 2650 | 2150 | 1800 | 1650 | 1500 | 1700 | 2150 | 2250 | 2400 | 2300 |
 | 7:26 | — | — | 7:28 | — | — | 7:28 | — | — | 7:30 | — | — | 7:31 | — | — | 7:33 | — | — |
 | — | 6:16 | — | — | 6:15 | — | — | 6:14 | — | — | 6:12 | — | — | 6:09 | — | — | 6:07 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Fri night. Warm (max 23°C on Fri afternoon, min 5°C on Sat night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Mostly dry. Very mild (max 12°C on Wed afternoon, min 5°C on Mon night). 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 |
|---|---|---|---|---|---|
 | |||||
SHIP7673 | |||||
SHIP10874 | |||||
SHIP4306 | |||||
SHIP3433 | |||||
SHIP4803 | |||||
SHIP9682 |
* 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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