– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Sun 01 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Sun 01 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mild with light rain (total 7mm) on Tue afternoon Becoming colder with a light covering of snow, mostly falling on Tue night. Freeze-thaw conditions (max 7°C on Sun afternoon, min 0°C on Wed morning). Winds increasing (calm on Mon afternoon, strong winds from the SW by Tue morning).											Days 5–7 Weather Summary A heavy fall of snow, heaviest during Wed night. Becoming milder with heavy rain (total 24mm) on Fri night. Freeze-thaw conditions (max 3°C on Fri night, min -3°C on Wed night). Mainly fresh winds.
	Sun 1		Monday 2			Tuesday 3			Wednesday 4			Thursday 5			Friday 6
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	light rain	light snow	light snow	light snow	light snow	mod. snow	cloudy	light snow	light snow	cloudy	light snow	light snow
km/h	WNW	NW	WNW	W	SW	SW	SW	SW	WSW	WSW	WSW	SW	WSW	W	WSW	WSW	WSW
See all weather maps
cm	—	—	—	—	—	—	1	5	2	2	9	—	3	4	—	1	3
mm	—	—	—	—	—	2	3	1.9	—	—	—	—	—	—	—	—	18
max °C	7	5	5	5	4	4	2	2	0	0	-2	-2	-1	1	1	2	3
min °C	5	3	4	5	3	3	2	1	0	0	-3	-3	-1	0	1	1	2
chill °C	3	1	2	4	0	-4	-5	-4	-6	-6	-10	-10	-8	-7	-3	-3	-4

Freezing level m	2400	2300	2200	2200	2200	1800	1600	1400	1300	1300	950	850	1000	1350	1400	1550	2000
Cloud base (m)	8000		8450	7850		1550	450	400	400	400	450	500	500	450	450	500	450

	—	—	6:45	—	—	6:43	—	—	6:41	—	—	6:39	—	—	6:37	—	—
	5:52	—	—	5:52	—	—	5:54	—	—	5:55	—	—	5:58	—	—	5:59	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with light rain (total 7mm) on Tue afternoon Becoming colder with a light covering of snow, mostly falling on Tue night. Freeze-thaw conditions (max 7°C on Sun afternoon, min 0°C on Wed morning). Winds increasing (calm on Mon afternoon, strong winds from the SW by Tue morning).

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Wed night. Becoming milder with heavy rain (total 24mm) on Fri night. Freeze-thaw conditions (max 3°C on Fri night, min -3°C on Wed night). Mainly fresh winds.

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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 48 minutes ago	9° C	Dry	Calm (0 kph at 341).
Black Diamond 32 km SSW 192m alt. 27 minutes ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Clear	Light winds from the NNW (19 kph at 330).	16 km
Auburn 39 km SW 119m alt. 40 minutes ago	20° C	Dry	Calm (0 kph at 309).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Clear	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	12° C	Clear	Light winds from the NW (13 kph at 310).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and partly cloudy.	Light winds from the NNW (13 kph at 340).	16 km Low: scattered
Snohomish 49 km NW 196m alt. 23 minutes ago	9° C	Dry	Calm (3 kph at 279).
Seattle 49 km WSW 100m alt. 2 hours ago	18° C	-	Wind obs. (6 kph from 227 degs) was rejected.
SHIP3991 54 km SSW 3m alt. 3 hours ago	15° C

* 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.