– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 10 am Sat 17 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sat 17 Oct Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 3mm), mostly falling on Sat morning. Mild temperatures (max 8°C on Sun afternoon, min 3°C on Sat night). Winds decreasing (fresh winds from the WSW on Sat morning, calm by Mon afternoon). | Days 4–6 Weather SummaryMostly dry. Very mild (max 13°C on Wed afternoon, min 4°C on Thu night). Wind will be generally light. | |||||||||||||||||
Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | |  | | | | | | | | | | |
light rain | rain shwrs | clear | clear | some clouds | cloudy | some clouds | some clouds | some clouds | some clouds | clear | clear | clear | clear | some clouds | some clouds | clear | clear | |
Cloud base (m) | 500 | 650 | 9350 | 4900 | 2800 | 2400 | 3200 | 3250 | 4050 | 9250 | 3200 | 2800 | ||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 2 | 0.3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 6 | 5 | 4 | 5 | 8 | 7 | 6 | 5 | 5 | 7 | 10 | 10 | 12 | 13 | 12 | 6 | 5 | 4 |
min °C | 5 | 5 | 3 | 4 | 6 | 7 | 6 | 5 | 5 | 5 | 9 | 9 | 10 | 12 | 7 | 6 | 5 | 4 |
chill °C | 2 | 3 | 0 | 2 | 5 | 5 | 5 | 5 | 5 | 4 | 8 | 8 | 10 | 12 | 6 | 5 | 4 | 3 |
Freezing level m | 2150 | 2200 | 2150 | 2700 | 3100 | 2800 | 2250 | 2250 | 2300 | 2500 | 2750 | 2900 | 3050 | 3050 | 2850 | 2400 | 2500 | 3050 |
 | 7:28 | — | — | 7:28 | — | — | 7:30 | — | — | 7:31 | — | — | 7:33 | — | — | 7:35 | — | — |
 | — | 6:15 | — | — | 6:14 | — | — | 6:12 | — | — | 6:09 | — | — | 6:07 | — | — | 6:06 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Light rain (total 3mm), mostly falling on Sat morning. Mild temperatures (max 8°C on Sun afternoon, min 3°C on Sat night). Winds decreasing (fresh winds from the WSW on Sat morning, calm by Mon afternoon).
Mount Si Weather (Days 3-6):
Mostly dry. Very mild (max 13°C on Wed afternoon, min 4°C on Thu 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 |
|---|---|---|---|---|---|
 | |||||
| |||||
SHIP9677 | |||||
SHIP9288 | |||||
SHIP10382 | |||||
SHIP5550 | |||||
SHIP5938 | |||||
* 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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