– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 am Sat 19 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sat 19 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 21°C on Sun afternoon, min 11°C on Mon night). Wind will be generally light. | Days 4–6 Weather SummarySome drizzle, heaviest during Wed night. Very mild (max 15°C on Tue afternoon, min 8°C on Wed night). Wind will be generally light. | |||||||||||||||||
Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | | | |  | | |  | |  | |  |  | | |  | |
clear | clear | clear | clear | clear | clear | some clouds | clear | clear | cloudy | some clouds | some clouds | some clouds | rain shwrs | rain shwrs | some clouds | cloudy | light rain | |
Cloud base (m) | 6950 | 6750 | 2400 | 1850 | 1600 | 6450 | 5900 | 2950 | ||||||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.5 | 0.7 | — | — | 0.2 |
max °C | 18 | 20 | 16 | 19 | 21 | 17 | 17 | 19 | 14 | 13 | 15 | 14 | 13 | 14 | 11 | 11 | 14 | 11 |
min °C | 13 | 20 | 14 | 15 | 21 | 14 | 14 | 19 | 11 | 12 | 15 | 9 | 9 | 14 | 8 | 8 | 13 | 10 |
chill °C | 13 | 20 | 14 | 15 | 21 | 14 | 14 | 19 | 11 | 12 | 15 | 8 | 9 | 14 | 8 | 8 | 13 | 10 |
Freezing level m | 3850 | 3850 | 4050 | 4100 | 4100 | 4000 | 3800 | 3750 | 3800 | 3600 | 3250 | 2650 | 2300 | 2400 | 2700 | 2900 | 2950 | 2750 |
 | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — |
 | — | 7:10 | — | — | 7:08 | — | — | 7:07 | — | — | 7:05 | — | — | 7:02 | — | — | 7:00 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Mostly dry. Warm (max 21°C on Sun afternoon, min 11°C on Mon night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Some drizzle, heaviest during Wed night. Very mild (max 15°C on Tue afternoon, min 8°C on Wed 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 |
|---|---|---|---|---|---|
 | |||||
 | |||||
SHIP4228 | |||||
SHIP7900 | |||||
SHIP9671 | |||||
SHIP4218 | |||||
SHIP6425 |
* 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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