– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Sat 29 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Sat 29 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 2°C on Sun night, min -1°C on Sat night). Wind will be generally light.										Days 5–7 Weather Summary A moderate fall of snow, heaviest on Thu morning. Turning milder with moderate rain (total 17mm), heaviest on Thu afternoon. Freeze-thaw conditions (max 3°C on Thu afternoon, min 0°C on Tue night). Winds increasing (calm on Tue night, gales from the SW by Thu night).
		Sunday 30			Monday 1			Tuesday 2			Wednesday 3			Thursday 4			Friday 5
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	clear	some clouds	cloudy	cloudy	light snow	cloudy	some clouds	some clouds	some clouds	some clouds	cloudy	light snow	mod. rain	mod. snow	light snow	light snow	light snow
km/h	NE	SW	WNW	NNW	NNW	NW	WSW	N	NW	NNW	W	WSW	NNW	SW	SW	SW	WSW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	3	—	—	—	—	—	—	4	—	7	1	2	5
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	0.4	9	7	—	—	—
max°C	0	1	1	2	2	2	2	0	-1	1	0	0	2	2	3	3	0	0	1
min°C	-1	1	1	1	1	1	0	-1	-1	0	0	0	0	2	2	1	0	0	-1
chill°C	-3	1	-1	-2	-2	-2	-6	-5	-4	0	-2	-2	-2	-2	-5	-6	-4	-8	-8

Freezing level (m)	850	1400	1600	1850	1600	1800	1300	1250	1100	1400	1400	1200	1300	1900	2100	1700	1300	1300	1500
Cloud base (m)	650	6600	5650	2500	2250	1650	800	450	450	600	500	2750	650	650	400	400	450	400	400

	—	7:31	—	—	7:33	—	—	7:35	—	—	7:35	—	—	7:37	—	—	7:37	—	—
	—	—	4:17	—	—	4:16	—	—	4:16	—	—	4:16	—	—	4:15	—	—	4:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 2°C on Sun night, min -1°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Thu morning. Turning milder with moderate rain (total 17mm), heaviest on Thu afternoon. Freeze-thaw conditions (max 3°C on Thu afternoon, min 0°C on Tue night). Winds increasing (calm on Tue night, gales from the SW by Thu night).

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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 29 minutes ago	-1° C	-	Calm (0 kph at 276).
Black Diamond 32 km SSW 192m alt. 44 minutes ago	7° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	1° C	-	Calm (0 kph at 0).	16 km Low: few
Auburn 39 km SW 119m alt. 35 minutes ago	-2° C	-	Calm (0 kph at 51).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-6° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	2° C	Clear	Light winds from the ENE (6 kph at 70).	11 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	3° C	-	Light winds from the NNE (13 kph at 30).	16 km Low: few
Snohomish 49 km NW 196m alt. 24 minutes ago	3° C	Dry	Calm (5 kph at 21).
Seattle 49 km WSW 100m alt. 55 minutes ago	13° C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	6° C		Light winds from the N (18 kph at 10).

* 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.