– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 am Tue 15 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Tue 15 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Warm (max 22°C on Thu afternoon, min 11°C on Tue morning). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Warm (max 21°C on Sat afternoon, min 11°C on Sun night). Wind will be generally light. | |||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  | | | | | | | | | | |  |  | |
rain shwrs | rain shwrs | rain shwrs | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | some clouds | some clouds | |
Cloud base (m) | 2150 | 2250 | 9000 | 8900 | 8900 | 8800 | 7000 | |||||||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.1 | 0.1 | 0.1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 14 | 17 | 13 | 18 | 21 | 16 | 20 | 22 | 17 | 17 | 19 | 15 | 18 | 21 | 16 | 19 | 21 | 16 |
min °C | 11 | 16 | 11 | 13 | 21 | 14 | 15 | 22 | 12 | 13 | 19 | 12 | 13 | 21 | 16 | 16 | 20 | 11 |
chill °C | 11 | 16 | 11 | 13 | 21 | 14 | 15 | 22 | 12 | 13 | 19 | 12 | 13 | 21 | 16 | 16 | 20 | 11 |
Freezing level m | 2500 | 2700 | 3100 | 3500 | 3700 | 3950 | 3900 | 3900 | 3850 | 3800 | 3850 | 4000 | 4050 | 4100 | 4100 | 3900 | 3800 | 3650 |
 | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — |
 | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:10 | — | — | 7:08 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Thu afternoon, min 11°C on Tue morning). Wind will be generally light.
Mount Si Weather (Days 3-6):
Mostly dry. Warm (max 21°C on Sat afternoon, min 11°C on Sun 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 |
|---|---|---|---|---|---|
 | |||||
 | |||||
SHIP8446 | |||||
SHIP5626 | |||||
SHIP8805 | |||||
SHIP4797 | |||||
SHIP6861 | |||||
SHIP3369 |
* 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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