– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Tue 03 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Tue 03 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 8mm) on Tue afternoon. Becoming colder with heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 2°C on Tue afternoon, min -3°C on Wed night). Winds decreasing (strong winds from the SW on Tue afternoon, calm by Fri morning).											Days 5–7 Weather Summary Mild with heavy rain (total 22mm), heaviest during Sun morning. Becoming colder with a moderate fall of snow heaviest on Mon morning. Freeze-thaw conditions (max 4°C on Sat afternoon, min -5°C on Sun night). Winds increasing (calm on Fri night, near gales from the SW by Sun afternoon).
	Tue 3		Wednesday 4			Thursday 5			Friday 6			Saturday 7			Sunday 8
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	mod. snow	light snow	snow shwrs	mod. snow	light snow	cloudy	cloudy	some clouds	some clouds	light rain	light rain	light rain	light rain	heavy rain	light rain	light snow
km/h	SW	SSW	SW	NW	WSW	SW	NW	W	NNW	NNW	SW	SW	WSW	WSW	SW	SW	SW
See all weather maps
cm	—	6	2	3	7	2	—	—	—	—	—	—	—	—	—	—	5
mm	6	1.8	—	—	—	—	—	—	—	—	0.7	1	0.5	4	12	3	—
max °C	2	2	1	1	0	-2	-2	-2	0	1	2	3	4	4	3	3	-1
min °C	2	1	1	0	-3	-3	-2	-2	-1	1	1	2	3	3	3	2	-5
chill °C	-5	-5	-4	-5	-9	-9	-6	-7	-4	-1	0	-2	-1	-2	-4	-6	-14

Freezing level m	1600	1500	1350	1500	1000	800	1000	1000	1100	1350	1600	2300	2450	2150	2100	1850	800
Cloud base (m)	400	400	450	700	450	450	450	450	500	700	700	450	450	450	400	400	500

	—	—	6:41	—	—	6:39	—	—	6:37	—	—	6:35	—	—	7:33	—	—
	5:54	—	—	5:55	—	—	5:58	—	—	5:59	—	—	6:00	—	—	7:01	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 8mm) on Tue afternoon. Becoming colder with heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 2°C on Tue afternoon, min -3°C on Wed night). Winds decreasing (strong winds from the SW on Tue afternoon, calm by Fri morning).

Mount Si Weather (Days 3-6):

Mild with heavy rain (total 22mm), heaviest during Sun morning. Becoming colder with a moderate fall of snow heaviest on Mon morning. Freeze-thaw conditions (max 4°C on Sat afternoon, min -5°C on Sun night). Winds increasing (calm on Fri night, near gales from the SW by Sun afternoon).

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. 53 minutes ago	11° C	Dry	Calm (0 kph at 30).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered Mid: broken High: broken
Auburn 39 km SW 119m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 19).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: broken Mid: broken High: overcast
SHIP10288 42 km WSW 3m alt. 3 hours ago	11° C		Light winds from the S (8 kph at 190).
SHIP4715 42 km WSW 3m alt. 3 hours ago	11° C		Light winds from the S (8 kph at 190).
SHIP8253 42 km WSW 3m alt. 3 hours ago	11° C		Light winds from the S (8 kph at 190).
SHIP7369 42 km WSW 3m alt. 2 hours ago	11° C		Calm (5 kph at 190).
SHIP9700 42 km WSW 15m alt. 2 hours ago			Calm (6 kph at 190).	- 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.