– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Fri 06 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Fri 06 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 22mm), mostly on Sat afternoon. Becoming colder with a light covering of snow ,mostly falling on Sat night. Freeze-thaw conditions (max 10°C on Fri morning, min -2°C on Sun night). Winds decreasing (strong winds from the SW on Sat afternoon, calm by Sun morning).									Days 4–6 Weather Summary A light covering of new snow mostly falling on Mon morning. Freeze-thaw conditions (max 2°C on Tue morning, min -2°C on Mon morning). Winds decreasing (fresh winds from the WSW on Mon morning, calm by Tue night).
	Friday 6			Saturday 7			Sunday 8			Monday 9			Tuesday 10			Wednesday 11
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

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

Freezing level m	2800	2550	2200	2000	2050	1550	1450	1200	1000	1000	1050	750	1600	1550	1350	1200	1200	1100
Cloud base (m)	7600	6200	2800	900	400	450	450	1550	450	450	450	550				1600	800	500

	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—	7:20	—	—	7:18	—	—
	—	5:15	—	—	5:17	—	—	5:19	—	—	5:21	—	—	5:22	—	—	5:23	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 22mm), mostly on Sat afternoon. Becoming colder with a light covering of snow ,mostly falling on Sat night. Freeze-thaw conditions (max 10°C on Fri morning, min -2°C on Sun night). Winds decreasing (strong winds from the SW on Sat afternoon, calm by Sun morning).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Mon morning. Freeze-thaw conditions (max 2°C on Tue morning, min -2°C on Mon morning). Winds decreasing (fresh winds from the WSW on Mon morning, calm by Tue 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. 41 minutes ago	10° C	Dry	Calm (0 kph at 343).
Black Diamond 32 km SSW 192m alt. 59 minutes ago	22° C	Dry	Light winds from the ESE (6 kph at 111).
Renton Airport 36 km WSW 218m alt. 3 hours ago	5° C	Clear	Wind obs. (6 kph from 110 degs) was rejected.	16 km
Auburn 39 km SW 119m alt. 2 hours ago	8° C	Dry	Calm (0 kph at 128).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2° C	Light rain .	Light winds from the E (7 kph at 80).	6 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	5° C	Clear	Light winds from the SSE (11 kph at 150).	14 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	7° C	Dry and partly cloudy.	Light winds from the SSE (6 kph at 150).	16 km Low: few Mid: scattered
Snohomish 49 km NW 196m alt. 50 minutes ago	9° C	Dry	Calm (2 kph at 152).
Seattle 49 km WSW 100m alt. 47 minutes ago	13° C	-	Wind obs. (21 kph from 239 degs) was rejected.
SHIP4745 51 km W 3m alt. 1 hour 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.