– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 am Mon 14 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Mon 14 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummarySome drizzle, heaviest during Mon morning. Warm (max 21°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Warm (max 23°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light. | |||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  | | | | | | | | | | | | |
rain shwrs | rain shwrs | some clouds | light rain | rain shwrs | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | |
Cloud base (m) | 900 | 1550 | 5600 | 1800 | 750 | 2500 | 9350 | 9450 | 8800 | |||||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.8 | 0.1 | — | 0.2 | 0.1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 12 | 15 | 12 | 12 | 15 | 12 | 18 | 21 | 16 | 21 | 23 | 17 | 17 | 19 | 15 | 17 | 20 | 15 |
min °C | 11 | 14 | 10 | 11 | 15 | 11 | 13 | 21 | 14 | 15 | 22 | 13 | 14 | 19 | 12 | 13 | 20 | 13 |
chill °C | 11 | 14 | 10 | 11 | 15 | 10 | 13 | 21 | 14 | 15 | 22 | 13 | 14 | 19 | 12 | 13 | 20 | 13 |
Freezing level m | 3400 | 3300 | 3150 | 2550 | 2650 | 3050 | 3600 | 3800 | 3850 | 3800 | 3800 | 3850 | 3900 | 3900 | 4050 | 4000 | 4050 | 4100 |
 | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — |
 | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:10 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Some drizzle, heaviest during Mon morning. Warm (max 21°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Mostly dry. Warm (max 23°C on Thu afternoon, min 12°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.
* 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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