– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sun 08 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sun 08 Mar 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 Tue night. Becoming milder with heavy rain (total 20mm) on Wed afternoon. Freeze-thaw conditions (max 6°C on Wed afternoon, min -2°C on Mon night). Winds increasing (light winds from the SW on Sun night, fresh winds from the SW by Wed afternoon).										Days 5–7 Weather Summary A moderate fall of snow heaviest on Thu night. Turning milder with heavy rain (total 102mm), heaviest during Fri morning. Freeze-thaw conditions (max 7°C on Wed night, min 0°C on Sat morning). Winds decreasing (strong winds from the SW on Wed night, calm by Sat morning).
		Monday 9			Tuesday 10			Wednesday 11			Thursday 12			Friday 13			Saturday 14
	night	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	snow shwrs	light snow	mod. snow	light snow	heavy rain	heavy rain	light snow	light snow	mod. snow	heavy rain	heavy rain	light snow	light snow	rain shwrs	cloudy
km/h	WSW	WSW	SW	SW	SW	SW	SW	SW	SW	SW	WSW	SW	SW	SW	W	WSW	NNW	NNW	E
See all weather maps
cm	1	2	2	4	1	2	7	3	—	—	1	3	9	—	—	5	1	—	—
mm	—	—	—	—	—	0.6	—	6	13	16	4	4	23	30	24	0.9	—	0.2	—
max °C	1	0	2	0	0	2	2	4	6	7	2	2	6	7	4	2	0	2	0
min °C	0	-1	1	-2	-2	1	1	2	4	3	2	2	1	7	3	1	0	2	-1
chill °C	-5	-6	-5	-6	-6	-3	-3	-2	0	-2	-3	-2	-1	2	0	-2	0	0	-1

Freezing level m	550	500	650	300	550	650	700	1200	1550	1050	850	800	1900	1800	1200	750	500	800	350
Cloud base (m)	400	400	450	400	450	700	450	400	400	450	500	450	400	400	400	400	450	500	450

	—	7:31	—	—	7:30	—	—	7:28	—	—	7:26	—	—	7:24	—	—	7:22	—	—
	—	—	7:02	—	—	7:04	—	—	7:06	—	—	7:07	—	—	7:08	—	—	7:09	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Tue night. Becoming milder with heavy rain (total 20mm) on Wed afternoon. Freeze-thaw conditions (max 6°C on Wed afternoon, min -2°C on Mon night). Winds increasing (light winds from the SW on Sun night, fresh winds from the SW by Wed afternoon).

Mount Si Weather (Days 3-6):

A moderate fall of snow heaviest on Thu night. Turning milder with heavy rain (total 102mm), heaviest during Fri morning. Freeze-thaw conditions (max 7°C on Wed night, min 0°C on Sat morning). Winds decreasing (strong winds from the SW on Wed night, calm by Sat morning).

This table gives the weather forecast for Mount Si at the specific elevation of 500 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. 1 hour ago	2° C	-	Calm (0 kph at 352).
Black Diamond 32 km SSW 192m alt. 1 hour ago	14° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Light winds from the SW (7 kph at 230).	16 km Low: overcast
Auburn 39 km SW 119m alt. 2 hours ago	-2° C	-	Calm (0 kph at 95).
Stampede Pass Airport 40 km SE 628m alt. 59 minutes ago	-4° C	Light snow.	Light winds from the N (11 kph at 1).	2 km Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and cloudy.	Light winds from the WSW (15 kph at 250).	16 km Low: broken Mid: overcast
Snohomish 49 km NW 196m alt. 2 hours ago	4° C	Dry	Calm (0 kph at 178).
SHIP419 54 km W -m alt. 3 hours ago	5° C	-	Light winds from the ESE (7 kph at 110).
SHIP8920 54 km W 15m alt. 3 hours ago			Calm (2 kph at 60).	- 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.