– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Thu 20 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Thu 20 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of new snow. Mild temperatures (max 5°C on Sat morning, min 1°C on Thu afternoon). Winds increasing (calm on Thu afternoon, strong winds from the SSW by Sun morning).											Days 5–7 Weather Summary A moderate fall of snow, heaviest on Sun afternoon. Freeze-thaw conditions (max 1°C on Wed morning, min -4°C on Mon night). Winds decreasing (strong winds from the SW on Sun afternoon, calm by Tue morning).
	Thu 20		Friday 21			Saturday 22			Sunday 23			Monday 24			Tuesday 25
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	some clouds	some clouds	cloudy	some clouds	light rain	light snow	light snow	light snow	snow shwrs	snow shwrs	cloudy	cloudy	some clouds	light snow
km/h	NW	W	WSW	SSW	SW	SW	SSW	SW	SSW	SW	WSW	WNW	NW	NW	NNW	SE	SSE
See all weather maps
cm	—	—	—	—	—	—	—	—	4	5	1	1	1	—	—	—	2
mm	—	—	—	—	—	—	—	0.1	—	—	—	—	—	—	—	—	—
max°C	1	3	3	4	4	5	4	4	1	-1	-3	-2	-3	-3	-2	-2	0
min°C	1	1	2	3	4	5	4	3	1	-3	-3	-3	-3	-4	-3	-2	-3
chill°C	-1	-1	-1	0	0	2	0	-1	-6	-9	-10	-7	-7	-9	-3	-5	-8

Freezing level (m)	1450	1700	2350	2100	2300	2450	2350	2000	1450	1150	850	850	850	750	850	1000	800
Cloud base (m)	600			2350	1000	800	1650	750	550	400	500	550	800	600	450	2750	1000

	—	—	7:20	—	—	7:22	—	—	7:22	—	—	7:24	—	—	7:26	—	—
	4:24	—	—	4:23	—	—	4:22	—	—	4:22	—	—	4:22	—	—	4:21	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Mild temperatures (max 5°C on Sat morning, min 1°C on Thu afternoon). Winds increasing (calm on Thu afternoon, strong winds from the SSW by Sun morning).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Sun afternoon. Freeze-thaw conditions (max 1°C on Wed morning, min -4°C on Mon night). Winds decreasing (strong winds from the SW on Sun afternoon, calm by Tue morning).

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.

Live conditions reported by 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 30 minutes ago	4° C	Dry	Calm (0 kph at 235).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Clear	Light winds from the N (7 kph at 1).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	5° C	Dry	Calm (0 kph at 196).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	1° C	Mist -.	Calm (0 kph at 0).	5 km Low: broken
SHIP3089 42 km WSW 15m alt. 3 hours ago			Light winds from the SSE (10 kph at 160).	- km
SHIP5165 42 km WSW 15m alt. 3 hours ago			Calm (4 kph at 100).	- km
SHIP582 42 km WSW -m alt. 2 hours ago	9° C	-	Calm (4 kph at 140).
SHIP4448 42 km WSW 3m alt. 3 hours ago	9° C		Light winds from the SSE (9 kph at 160).
SHIP7470 42 km WSW 15m alt. 2 hours ago			Calm (4 kph at 300).	- km
SHIP7955 42 km WSW 15m alt. 3 hours ago			Calm (4 kph at 100).	- km

* 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.