– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Fri 03 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Fri 03 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 13°C on Sun afternoon, min 3°C on Fri night). Wind will be generally light.										Days 5–7 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 6°C on Mon night, min -4°C on Mon night). Winds decreasing (fresh winds from the SW on Mon night, calm by Wed morning).
		Saturday 4			Sunday 5			Monday 6			Tuesday 7			Wednesday 8			Thursday 9
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	some clouds	cloudy	some clouds	some clouds	clear	rain shwrs	snow shwrs	some clouds	clear	some clouds	some clouds	cloudy	clear	clear	clear	some clouds
km/h	NW	NE	E	ESE	ESE	SE	S	SW	WSW	WSW	WNW	NW	NW	NNW	NNW	NNW	NNW	WNW	W
See all weather maps
cm	—	—	—	—	—	—	—	—	—	1	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	0.6	0.5	—	—	—	—	—	—	—	—	—
max °C	3	6	9	10	12	13	12	10	10	6	-3	0	0	-2	0	1	2	4	3
min °C	3	4	7	9	11	12	10	10	9	-4	-4	-1	-3	-3	-1	0	1	3	0
chill °C	3	2	7	9	10	11	9	8	6	-10	-8	-4	-6	-3	-4	0	-2	0	-2

Freezing level m	2100	2500	2850	3050	3100	3100	3000	2800	2650	1200	850	1300	950	1000	1250	1450	1450	1800	1400
Cloud base (m)	7000		7000	6050	6300	6850	5950	5800	1850	500	500	550	650	600	700	800	850	1450	1500

	—	6:39	—	—	6:37	—	—	6:35	—	—	6:33	—	—	6:31	—	—	6:30	—	—
	—	—	7:39	—	—	7:40	—	—	7:43	—	—	7:44	—	—	7:45	—	—	7:46	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 13°C on Sun afternoon, min 3°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

A dusting of new snow. Freeze-thaw conditions (max 6°C on Mon night, min -4°C on Mon night). Winds decreasing (fresh winds from the SW on Mon night, calm by Wed morning).

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	8° C	Dry	Calm (0 kph at 0).
Renton 30 km WSW 160m alt. 1 hour ago	6° C	Dry	Calm (0 kph at 44).
Black Diamond 32 km SSW 192m alt. 49 minutes ago		-	Wind obs. (8 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Clear	Light winds from the SSW (6 kph at 210).	16 km
Auburn 39 km SW 119m alt. 55 minutes ago	1° C	-	Calm (0 kph at 68).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2° C	Clear	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	9° C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	8° C	Clear	Light winds from the N (9 kph at 350).	16 km
Snohomish 49 km NW 196m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 82).
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	9° 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.