– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 am Tue 22 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Tue 22 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 8mm), mostly falling on Thu night. Very mild (max 16°C on Wed afternoon, min 9°C on Tue night). Wind will be generally light. | Days 4–6 Weather SummaryModerate rain (total 19mm), heaviest on Fri morning. Very mild (max 15°C on Sun afternoon, min 6°C on Fri night). Wind will be generally light. | |||||||||||||||||
Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  | |  |  |  | |  | | | | | | | |
rain shwrs | rain shwrs | clear | cloudy | clear | some clouds | cloudy | some clouds | mod. rain | heavy rain | rain shwrs | rain shwrs | some clouds | some clouds | some clouds | some clouds | cloudy | clear | |
Cloud base (m) | 500 | 2650 | 2300 | 2250 | 6250 | 3100 | 2850 | 400 | 450 | 500 | 950 | 6800 | 3650 | 3200 | 3000 | 2450 | ||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.2 | 0.3 | — | — | — | — | — | — | 8 | 14 | 3 | 1.4 | — | — | — | — | — | — |
max °C | 12 | 15 | 12 | 13 | 16 | 12 | 15 | 15 | 11 | 9 | 11 | 8 | 11 | 14 | 12 | 14 | 15 | 11 |
min °C | 12 | 14 | 9 | 11 | 15 | 10 | 12 | 12 | 10 | 8 | 9 | 6 | 6 | 14 | 9 | 10 | 14 | 8 |
chill °C | 12 | 14 | 9 | 11 | 15 | 10 | 12 | 12 | 10 | 6 | 9 | 6 | 5 | 14 | 8 | 10 | 14 | 8 |
Freezing level m | 3400 | 3150 | 2700 | 3000 | 3100 | 3350 | 2950 | 3100 | 2450 | 1750 | 2000 | 1950 | 2400 | 2550 | 2450 | 2500 | 2400 | 2400 |
 | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — |
 | — | 7:05 | — | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — | — | 6:57 | — | — | 6:54 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Light rain (total 8mm), mostly falling on Thu night. Very mild (max 16°C on Wed afternoon, min 9°C on Tue night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Moderate rain (total 19mm), heaviest on Fri morning. Very mild (max 15°C on Sun afternoon, min 6°C on Fri 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 |
|---|---|---|---|---|---|
 | |||||
 | |||||
SHIP5710 | |||||
SHIP3283 | |||||
SHIP8039 | |||||
SHIP7306 | |||||
SHIP3785 | |||||
SHIP4047 |
* 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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