– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Fri 27 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Fri 27 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 afternoon. Freeze-thaw conditions (max 6°C on Fri afternoon, min -7°C on Sun night). Wind will be generally light.											Days 5–7 Weather Summary A heavy fall of snow, heaviest during Wed morning. Freeze-thaw conditions (max 2°C on Tue afternoon, min -5°C on Mon afternoon). Winds increasing (calm on Mon night, strong winds from the SW by Wed night).
	Fri 27		Saturday 28			Sunday 29			Monday 30			Tuesday 31			Wednesday 1
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	cloudy	some clouds	cloudy	some clouds	cloudy	mod. snow	snow shwrs	some clouds	some clouds	some clouds	cloudy	cloudy	light snow	mod. snow	light snow	mod. snow
km/h	ESE	WNW	NNW	WSW	SW	SW	W	W	WNW	N	NE	SE	SE	SSE	SSW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	7	10	—	—	—	—	—	1	9	5	7
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	6	4	1	1	0	-3	-2	-5	-6	-4	-2	0	2	1	0	-1	-3
min °C	6	2	1	1	-3	-3	-4	-7	-7	-5	-4	-1	2	-1	0	-1	-4
chill °C	6	0	-2	-2	-9	-9	-9	-14	-11	-8	-7	-4	-1	-7	-6	-7	-10

Freezing level m	2300	1900	1350	1350	950	950	600	300	550	800	0	1300	1500	1050	1300	1100	650
Cloud base (m)	6200	4650	2500	850	550	900	600	750	650	700	450	2650	2600	600	350	400	400

	—	—	6:54	—	—	6:52	—	—	6:50	—	—	6:48	—	—	6:46	—	—
	7:29	—	—	7:30	—	—	7:31	—	—	7:32	—	—	7:34	—	—	7:36	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow, heaviest on Sun afternoon. Freeze-thaw conditions (max 6°C on Fri afternoon, min -7°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Wed morning. Freeze-thaw conditions (max 2°C on Tue afternoon, min -5°C on Mon afternoon). Winds increasing (calm on Mon night, strong winds from the SW by Wed 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 331).
Renton 30 km WSW 160m alt. 54 minutes ago	11° C	-	Calm (3 kph at 344).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Clear	Light winds from the N (13 kph at 350).	16 km
Auburn 39 km SW 119m alt. 54 minutes ago	12° C	Dry	Calm (0 kph at 147).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	8° C	Clear	Calm (0 kph at 0).	16 km
SHIP4071 43 km W 15m alt. 3 hours ago				- km
SHIP2795 43 km W 15m alt. 3 hours ago				- km
SHIP8733 43 km W 15m alt. 3 hours ago				- km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and partly cloudy.	Light winds from the NW (13 kph at 310).	16 km Low: broken

* 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.