– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 pm Wed 09 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Wed 09 Sep 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 18°C on Wed afternoon, min 5°C on Fri morning). Wind will be generally light. | Days 5–7 Weather SummarySome drizzle, heaviest during Sat night. Very mild (max 15°C on Tue morning, min 6°C on Sun morning). Wind will be generally light. | ||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  | | | | |  | | | |  | |
clear | some clouds | some clouds | some clouds | rain shwrs | cloudy | light rain | cloudy | cloudy | light rain | rain shwrs | light rain | rain shwrs | rain shwrs | some clouds | clear | clear | |
Cloud base (m) | 8900 | 6550 | 850 | 650 | 400 | 800 | 6100 | 5050 | 2800 | 2000 | 2700 | 500 | 600 | 750 | 6700 | 6700 | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | 0.3 | — | 0.1 | — | — | 0.3 | 0.6 | 0.2 | 0.2 | 0.1 | — | — | — |
max °C | 18 | 16 | 9 | 10 | 9 | 5 | 9 | 9 | 11 | 10 | 9 | 6 | 8 | 8 | 9 | 13 | 13 |
min °C | 18 | 12 | 9 | 9 | 6 | 5 | 7 | 8 | 9 | 10 | 7 | 6 | 7 | 6 | 7 | 11 | 13 |
chill °C | 18 | 11 | 7 | 8 | 5 | 3 | 7 | 8 | 8 | 10 | 5 | 3 | 4 | 5 | 6 | 11 | 13 |
Freezing level m | 4300 | 4100 | 3700 | 3400 | 2900 | 2600 | 2750 | 2700 | 2600 | 2600 | 2650 | 2450 | 2700 | 3250 | 3250 | 3400 | 3350 |
 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — |
 | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:21 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Mostly dry. Very mild (max 18°C on Wed afternoon, min 5°C on Fri morning). Wind will be generally light.
Mount Si Weather (Days 3-6):
Some drizzle, heaviest during Sat night. Very mild (max 15°C on Tue morning, min 6°C on Sun morning). Wind will be generally light.
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 |
|---|---|---|---|---|---|
 | |||||
| |||||
SHIP6588 | |||||
SHIP3214 | |||||
SHIP4399 | |||||
Seattl / oeing Airport | |
* 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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