– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sat 28 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sat 28 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 1°C on Sat night, min -7°C on Sun night). Winds decreasing (strong winds from the WSW on Sun afternoon, calm by Tue afternoon).										Days 5–7 Weather Summary A moderate fall of snow, heaviest on Wed morning. Freeze-thaw conditions (max 1°C on Tue night, min -4°C on Thu morning). Wind will be generally light.
		Sunday 29			Monday 30			Tuesday 31			Wednesday 1			Thursday 2			Friday 3
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	some clouds	light snow	mod. snow	some clouds	some clouds	some clouds	cloudy	cloudy	light snow	light snow	light snow	snow shwrs	light snow	snow shwrs	light snow	some clouds	some clouds	clear
km/h	SW	SW	WSW	NW	N	NNE	SE	SSE	WSW	SE	SE	SW	WSW	NW	NW	NNW	NW	NNW	N
See all weather maps
cm	—	—	3	10	—	—	—	—	—	1	3	4	3	1	1	1	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	1	-2	0	-4	-6	-3	-1	0	0	1	0	0	-2	-3	-1	-1	-1	1	0
min °C	-2	-2	-1	-7	-7	-4	-2	0	0	-1	0	-1	-3	-4	-2	-2	-2	0	0
chill °C	-7	-8	-9	-12	-10	-4	-2	-3	0	-7	-6	-5	-9	-9	-7	-6	-4	-2	-2

Freezing level m	1050	1050	1150	250	600	900	950	1300	1300	1450	1300	1100	800	850	1150	1000	1100	1350	1200
Cloud base (m)	1650	500	500	550	450	600	400	400	1500	2000	350	350	400	400	650	450	500	750	900

	—	6:52	—	—	6:50	—	—	6:48	—	—	6:46	—	—	6:43	—	—	6:41	—	—
	—	—	7:31	—	—	7:32	—	—	7:34	—	—	7:36	—	—	7:37	—	—	7:38	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 1°C on Sat night, min -7°C on Sun night). Winds decreasing (strong winds from the WSW on Sun afternoon, calm by Tue afternoon).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Wed morning. Freeze-thaw conditions (max 1°C on Tue night, min -4°C on Thu morning). Wind will be generally light.

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. 37 minutes ago	7° C	Dry	Calm (0 kph at 311).
Renton 30 km WSW 160m alt. 20 minutes ago	5° C	-	Calm (0 kph at 18).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Dry and partly cloudy.	Light winds from the N (6 kph at 0).	16 km Low: scattered
Auburn 39 km SW 119m alt. 37 minutes ago	8° C	Dry	Calm (0 kph at 200).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	Dry and partly cloudy.	Light winds from the N (6 kph at 1).	16 km Low: scattered
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	8° 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	7° C	Dry and partly cloudy.	Light winds from the N (11 kph at 10).	16 km Low: scattered
Snohomish 49 km NW 196m alt. 1 hour ago	7° C	Dry	Calm (5 kph at 221).
SHIP4136 51 km W 15m alt. 2 hours ago				- km
SHIP9059 51 km W 3m alt. 2 hours ago

* 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.