– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Wed 11 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Wed 11 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 20mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu afternoon. Freeze-thaw conditions (max 3°C on Wed afternoon, min -7°C on Fri night). Winds decreasing (stormy winds from the WSW on Wed night, light winds from the W by Fri night).									Days 4–6 Weather Summary A light fall of snow, heaviest on Sat morning. Turning milder with light rain (total 2mm) on Sun night. Freeze-thaw conditions (max 7°C on Mon afternoon, min -7°C on Sat morning). Winds increasing (calm on Sat night, strong winds from the WSW by Mon afternoon).
	Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15			Monday 16
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	light snow	light snow	mod. snow	heavy snow	mod. snow	light snow	mod. snow	snow shwrs	snow shwrs	some clouds	cloudy	light snow	light snow	light rain	light rain	clear
km/h	SSW	SW	WSW	WSW	WSW	SW	SW	SW	WNW	NW	W	NE	S	SW	SW	SW	WSW	SW
See all weather maps
cm	5	3	2	2	7	20	9	1	8	3	2	—	—	3	2	—	—	—
mm	—	7	13	—	—	—	—	—	—	—	—	—	—	—	1	0.5	0.7	—
max °C	-1	3	3	-5	-4	-4	-4	-3	-4	-7	-5	-4	-2	-1	3	3	7	7
min °C	-2	1	-4	-5	-4	-5	-4	-3	-7	-7	-6	-6	-2	-1	2	3	6	6
chill °C	-9	-8	-14	-15	-13	-13	-9	-8	-15	-15	-11	-10	-5	-7	-4	-3	1	1

Freezing level m	1050	1850	1000	650	650	550	600	700	400	400	600	0	850	1000	2650	3200	3200	3300
Cloud base (m)	400	400	550	450	450	400	400	400	400	450	450	700	2550	500	900	550	500	9550

	7:28	—	—	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—	7:18	—	—
	—	7:06	—	—	7:07	—	—	7:08	—	—	7:09	—	—	7:12	—	—	7:13	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 20mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu afternoon. Freeze-thaw conditions (max 3°C on Wed afternoon, min -7°C on Fri night). Winds decreasing (stormy winds from the WSW on Wed night, light winds from the W by Fri night).

Mount Si Weather (Days 3-6):

A light fall of snow, heaviest on Sat morning. Turning milder with light rain (total 2mm) on Sun night. Freeze-thaw conditions (max 7°C on Mon afternoon, min -7°C on Sat morning). Winds increasing (calm on Sat night, strong winds from the WSW by Mon 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. 49 minutes ago	5° C	Dry	Calm (0 kph at 26).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	2° C	-	Calm (0 kph at 359).
Grotto wx 35 km NE 321m alt. 1 hour ago	1° C	-	Calm (0 kph at 58).
Renton Airport 36 km WSW 218m alt. 3 hours ago	6° C	Light rain .	Light winds from the SSE (7 kph at 160).	10 km Mid: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	-1° C	-	Calm (0 kph at 200).
Auburn 39 km SW 119m alt. 40 minutes ago		-	Calm (3 kph at 51).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-2° C	Moderate snow.	Calm (0 kph at 0).	1 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	-1° C	-	Calm (2 kph at 103).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	6° C	Light rain .	Light winds from the S (15 kph at 170).	8 km Mid: scattered High: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	4° C	Light rain .	Light winds from the S (17 kph at 190).	11 km Low: few Mid: broken High: overcast

* 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.