– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Fri 13 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Fri 13 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A heavy fall of snow, heaviest during Mon morning. Temperatures will be below freezing (max -1°C on Fri night, min -4°C on Mon morning). Wind will be generally light.										Days 5–7 Weather Summary A heavy fall of snow, heaviest during Thu morning. Temperatures will be below freezing (max -4°C on Tue afternoon, min -7°C on Wed night). Winds increasing (calm on Mon night, strong winds from the WSW by Thu afternoon).
		Saturday 14			Sunday 15			Monday 16			Tuesday 17			Wednesday 18			Thursday 19
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. snow	light snow	cloudy	cloudy	cloudy	light snow	light snow	mod. snow	cloudy	light snow	snow shwrs	light snow	some clouds	light snow	light snow	mod. snow	mod. snow	light snow	heavy snow
km/h	SW	SW	ENE	NNE	ESE	S	SW	WSW	SSW	SW	SSW	NW	NNW	W	WSW	SW	WSW	WSW	W
See all weather maps
cm	6	1	—	—	—	4	3	7	—	2	1	1	—	3	2	6	9	4	24
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	-1	-2	-2	-2	-1	-1	-1	-3	-3	-5	-5	-4	-5	-6	-5	-5	-5	-4	-5
min °C	-3	-3	-2	-2	-2	-1	-2	-4	-4	-6	-5	-4	-6	-6	-5	-7	-6	-4	-6
chill °C	-10	-7	-2	-4	-4	-1	-4	-10	-7	-8	-7	-7	-9	-11	-11	-16	-14	-12	-11

Freezing level m	1000	900	1050	850	950	1050	1050	700	800	500	600	700	0	450	550	400	400	600	450
Cloud base (m)	400	400	600	500	400	400	400	350	500	350	400	500	400	400	400	400	450	400	400

	—	7:13	—	—	7:11	—	—	7:09	—	—	7:07	—	—	7:05	—	—	7:05	—	—
	—	—	5:29	—	—	5:30	—	—	5:31	—	—	5:32	—	—	5:35	—	—	5:36	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Mon morning. Temperatures will be below freezing (max -1°C on Fri night, min -4°C on Mon morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Thu morning. Temperatures will be below freezing (max -4°C on Tue afternoon, min -7°C on Wed night). Winds increasing (calm on Mon night, strong winds from the WSW by Thu 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. 38 minutes ago	4° C	Dry	Calm (0 kph at 355).
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	7° C	Dry and cloudy.	Light winds from the SSW (7 kph at 210).	16 km Low: scattered Mid: overcast
Auburn 39 km SW 119m alt. 1 hour ago	4° C	Dry	Calm (0 kph at 272).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-1° C	Light snow.	Calm (0 kph at 0).	1 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	6° C	Dry and partly cloudy.	Light winds from the S (13 kph at 190).	16 km Low: scattered Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	5° C	Dry and partly cloudy.	Moderate winds from the SW (22 kph at 230).	16 km Low: broken Mid: broken High: broken
Snohomish 49 km NW 196m alt. 55 minutes ago	4° C	Dry	Calm (0 kph at 111).
SHIP5017 54 km W 3m alt. 2 hours ago	6° C		Calm (5 kph at 180).
SHIP2568 54 km W 15m alt. 3 hours ago			Calm (6 kph at 220).	- 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.