– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 am Wed 09 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Wed 09 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 Thu night. Warm (max 23°C on Wed afternoon, min 10°C on Thu night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Very mild (max 19°C on Mon afternoon, min 10°C on Sat night). Wind will be generally light. | |||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  |  |  |  | | | | | | | | | |
clear | clear | clear | rain shwrs | rain shwrs | rain shwrs | light rain | some clouds | some clouds | cloudy | light rain | rain shwrs | rain shwrs | clear | clear | clear | clear | some clouds | |
Cloud base (m) | 9600 | 8850 | 6800 | 600 | 550 | 400 | 700 | 6050 | 4550 | 3200 | 2450 | 550 | 9250 | 5600 | ||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | 0.1 | 0.1 | 0.7 | 0.1 | — | — | — | 0.2 | 0.7 | 0.1 | — | — | — | — | — |
max °C | 21 | 23 | 18 | 13 | 16 | 14 | 12 | 15 | 13 | 15 | 15 | 12 | 12 | 17 | 13 | 17 | 19 | 14 |
min °C | 16 | 23 | 13 | 13 | 13 | 10 | 10 | 15 | 12 | 12 | 15 | 10 | 11 | 16 | 10 | 12 | 19 | 12 |
chill °C | 16 | 23 | 13 | 13 | 13 | 10 | 10 | 15 | 12 | 12 | 15 | 10 | 11 | 16 | 10 | 12 | 19 | 12 |
Freezing level m | 4350 | 4350 | 4050 | 3600 | 3300 | 2900 | 2800 | 2850 | 2800 | 2550 | 2550 | 2700 | 2650 | 2950 | 3150 | 3200 | 3200 | 3100 |
 | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — |
 | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:21 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Some drizzle, heaviest during Thu night. Warm (max 23°C on Wed afternoon, min 10°C on Thu night). Wind will be generally light.
Mount Si Weather (Days 3-6):
Mostly dry. Very mild (max 19°C on Mon afternoon, min 10°C on Sat 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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