– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 am Sun 13 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sun 13 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryHeavy rain (total 28mm), heaviest during Sun morning. Very mild (max 16°C on Tue afternoon, min 9°C on Sun morning). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Warm (max 23°C on Thu afternoon, min 13°C on Wed morning). Wind will be generally light. | |||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  |  |  | | | | | | | | | |
heavy rain | mod. rain | rain shwrs | light rain | rain shwrs | some clouds | rain shwrs | some clouds | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | |
Cloud base (m) | 400 | 400 | 550 | 600 | 900 | 6900 | 2450 | 1550 | ||||||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 16 | 9 | 2 | 0.4 | 0.1 | — | 0.1 | — | — | — | — | — | — | — | — | — | — | — |
max °C | 9 | 10 | 11 | 11 | 15 | 12 | 13 | 16 | 13 | 19 | 22 | 17 | 22 | 23 | 18 | 19 | 21 | 16 |
min °C | 9 | 9 | 10 | 10 | 13 | 10 | 10 | 16 | 12 | 13 | 21 | 15 | 17 | 23 | 14 | 15 | 21 | 14 |
chill °C | 7 | 7 | 9 | 10 | 13 | 10 | 10 | 16 | 12 | 13 | 21 | 15 | 17 | 23 | 14 | 15 | 21 | 14 |
Freezing level m | 2150 | 2450 | 2800 | 3400 | 3350 | 3200 | 2600 | 2700 | 3150 | 3700 | 3900 | 3950 | 3900 | 3900 | 3800 | 3850 | 3950 | 4000 |
 | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — |
 | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Heavy rain (total 28mm), heaviest during Sun morning. Very mild (max 16°C on Tue afternoon, min 9°C on Sun morning). Wind will be generally light.
Mount Si Weather (Days 3-6):
Mostly dry. Warm (max 23°C on Thu afternoon, min 13°C on Wed morning). 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 |
|---|---|---|---|---|---|
 | |||||
| |||||
Seattl / oeing Airport | | ||||
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BUOY-EBSW1 | |||||
* 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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