– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 pm Tue 06 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Tue 06 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–4 Weather SummaryLight rain (total 4mm), mostly falling on Fri morning. Very mild (max 17°C on Wed afternoon, min 3°C on Fri afternoon). Winds increasing (light winds from the N on Tue night, near gales from the WSW by Fri morning). | Days 5–7 Weather SummaryMostly dry. Freeze-thaw conditions (max 11°C on Mon afternoon, min 0°C on Fri night). Wind will be generally light. | |||||||||||||||
Wednesday 7 | Thursday 8 | Friday 9 | Saturday 10 | Sunday 11 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | | | | |  |  | |  |  |  | | | | | |
clear | clear | clear | clear | clear | clear | some clouds | light rain | light rain | rain shwrs | some clouds | rain shwrs | clear | clear | clear | clear | |
Cloud base (m) | 9200 | 9600 | 9450 | 9100 | 8650 | 550 | 600 | 500 | 800 | 1600 | ||||||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | 2 | 1.3 | 0.4 | — | 0.1 | — | — | — | — |
max °C | 15 | 16 | 17 | 15 | 15 | 15 | 12 | 8 | 4 | 2 | 1 | 4 | 4 | 5 | 7 | 6 |
min °C | 14 | 15 | 17 | 14 | 14 | 14 | 8 | 4 | 3 | 0 | 1 | 3 | 3 | 3 | 6 | 6 |
chill °C | 14 | 15 | 17 | 13 | 13 | 13 | 3 | -2 | -2 | -4 | 1 | 1 | 1 | 3 | 6 | 6 |
Freezing level m | 4250 | 4150 | 4100 | 4100 | 4050 | 4050 | 3600 | 2050 | 1750 | 1350 | 1450 | 1800 | 1900 | 2050 | 2400 | 3350 |
 | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — |
 | — | — | 6:35 | — | — | 6:32 | — | — | 6:30 | — | — | 6:29 | — | — | 6:27 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Fri morning. Very mild (max 17°C on Wed afternoon, min 3°C on Fri afternoon). Winds increasing (light winds from the N on Tue night, near gales from the WSW by Fri morning).
Mount Si Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 11°C on Mon afternoon, min 0°C on Fri night). Wind will be generally light.
This table gives the weather forecast for Mount Si at the specific elevation of 1270 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 | | ||||
| |||||
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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