– Lat/Long: 47.51° N 121.74° W
Mount Si
Weather Forecast, United StatesIssued: 4 am Fri 04 Sep Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Fri 04 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Fri 04 Sep Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 10mm), mostly falling on Sat night. Very mild (max 13°C on Sun afternoon, min 6°C on Fri morning). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Very mild (max 18°C on Wed afternoon, min 9°C on Mon morning). Wind will be generally light. | |||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | |  |  | | | | | | | |  | |
rain shwrs | risk tstorm | light rain | some clouds | light rain | rain shwrs | some clouds | rain shwrs | some clouds | clear | some clouds | some clouds | some clouds | some clouds | some clouds | clear | clear | clear | |
Cloud base (m) | 1750 | 1600 | 2700 | 2600 | 2100 | 2800 | 2700 | 2500 | 2650 | 2750 | 1800 | 6400 | 5500 | 6000 | 5450 | 5600 | ||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.7 | 1.7 | 0.3 | — | 1.6 | 5 | — | 0.1 | — | — | — | — | — | — | — | — | — | — |
max °C | 7 | 10 | 9 | 10 | 11 | 10 | 12 | 13 | 11 | 9 | 11 | 10 | 12 | 15 | 15 | 17 | 18 | 17 |
min °C | 6 | 8 | 8 | 9 | 10 | 9 | 10 | 12 | 9 | 9 | 10 | 9 | 11 | 14 | 15 | 15 | 18 | 16 |
chill °C | 4 | 7 | 8 | 8 | 10 | 8 | 10 | 11 | 8 | 8 | 9 | 9 | 10 | 13 | 14 | 15 | 18 | 16 |
Freezing level m | 2250 | 2500 | 2550 | 2500 | 2700 | 2650 | 2700 | 2800 | 2800 | 2850 | 3050 | 3350 | 3300 | 3400 | 3450 | 3600 | 3650 | 3600 |
 | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — |
 | — | 7:42 | — | — | 7:39 | — | — | 7:37 | — | — | 7:36 | — | — | 7:32 | — | — | 7:30 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Light rain (total 10mm), mostly falling on Sat night. Very mild (max 13°C on Sun afternoon, min 6°C on Fri morning). Wind will be generally light.
Mount Si Weather (Days 3-6):
Mostly dry. Very mild (max 18°C on Wed afternoon, min 9°C on Mon 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 |
|---|---|---|---|---|---|
 | |||||
SHIP6416 | |||||
SHIP8672 | |||||
SHIP2793 | |||||
SHIP6791 | |||||
SHIP4669 | |||||
SHIP11447 |
* 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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