– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 4 am Wed 21 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Wed 21 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Freeze-thaw conditions (max 14°C on Wed afternoon, min 0°C on Fri morning). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Mild temperatures (max 9°C on Sun morning, min 4°C on Sat morning). Wind will be generally light. | |||||||||||||||||
Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | |  |  | | | | |  |  | | |  | | |  | |
clear | clear | clear | clear | some clouds | rain shwrs | some clouds | some clouds | clear | some clouds | cloudy | cloudy | some clouds | cloudy | some clouds | some clouds | cloudy | light rain | |
Cloud base (m) | 8800 | 8350 | 8400 | 750 | 550 | 500 | 500 | 6800 | 5500 | 3100 | 6300 | 2600 | 2850 | 3250 | 3500 | 2850 | 2100 | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | 0.1 | — | — | — | — | — | — | — | — | — | — | — | 0.5 |
max °C | 13 | 14 | 12 | 9 | 6 | 4 | 0 | 2 | 3 | 5 | 7 | 7 | 9 | 9 | 9 | 8 | 9 | 7 |
min °C | 13 | 13 | 10 | 8 | 5 | 1 | 0 | 1 | 2 | 4 | 6 | 7 | 7 | 9 | 9 | 8 | 7 | 4 |
chill °C | 12 | 12 | 10 | 7 | 2 | -5 | -6 | -3 | -1 | 4 | 5 | 5 | 5 | 7 | 7 | 6 | 7 | 1 |
Freezing level m | 3050 | 3200 | 3150 | 2900 | 2250 | 1600 | 1350 | 1500 | 2100 | 2500 | 2600 | 2650 | 2650 | 2650 | 2750 | 2450 | 2200 | 1950 |
 | 7:33 | — | — | 7:35 | — | — | 7:35 | — | — | 7:37 | — | — | 7:39 | — | — | 7:41 | — | — |
 | — | 6:07 | — | — | 6:06 | — | — | 6:05 | — | — | 6:02 | — | — | 6:00 | — | — | 5:59 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 14°C on Wed afternoon, min 0°C on Fri morning). Wind will be generally light.
Mount Si Weather (Days 3-6):
Mostly dry. Mild temperatures (max 9°C on Sun morning, min 4°C on Sat morning). 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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