– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Thu 25 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Thu 25 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A heavy fall of snow, heaviest during Fri night. Freeze-thaw conditions (max 3°C on Thu morning, min -6°C on Fri night). Winds decreasing (near gales from the SW on Fri morning, light winds from the W by Sat night).									Days 4–6 Weather Summary Mostly dry. Freeze-thaw conditions (max 6°C on Tue morning, min -3°C on Sun morning). Wind will be generally light.
	Thursday 25			Friday 26			Saturday 27			Sunday 28			Monday 29			Tuesday 30
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	light snow	snow shwrs	light snow	light snow	heavy snow	snow shwrs	some clouds	some clouds	cloudy	some clouds	some clouds	some clouds	cloudy	some clouds	some clouds	some clouds	some clouds
km/h	ESE	SW	S	SW	SW	WNW	WNW	SW	SW	N	N	N	N	N	N	S	SSW	SW
See all weather maps
cm	—	5	2	1	3	12	1	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	3	0	0	-2	-5	-4	-6	-5	-4	-2	-1	1	3	3	5	6	6	6
min °C	1	0	-1	-2	-5	-6	-6	-6	-5	-3	-2	-1	2	3	3	6	6	6
chill °C	-3	-7	-7	-10	-14	-12	-10	-11	-10	-8	-7	-6	-2	0	0	6	4	3

Freezing level m	1800	1200	1250	1000	600	500	350	500	400	700	950	1100	2200	2200	2750	2750	2950	2850
Cloud base (m)	1950	700	450	1400	400	400	450	450	550	500	500	700	900	700	3300	1850	750	6600

	7:52	—	—	7:52	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—
	—	4:20	—	—	4:21	—	—	4:22	—	—	4:22	—	—	4:22	—	—	4:23	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Fri night. Freeze-thaw conditions (max 3°C on Thu morning, min -6°C on Fri night). Winds decreasing (near gales from the SW on Fri morning, light winds from the W by Sat night).

Mount Si Weather (Days 3-6):

Mostly dry. Freeze-thaw conditions (max 6°C on Tue morning, min -3°C on Sun 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 50 minutes ago	2° C	-	Calm (0 kph at 353).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	4° C	Clear	Moderate winds from the NNW (22 kph at 340).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	4° C	Dry	Calm (0 kph at 130).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-2° C	-	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	5° C	Clear	Light winds from the N (6 kph at 1).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and partly cloudy.	Moderate winds from the N (20 kph at 10).	16 km Low: few Mid: broken
Snohomish 49 km NW 196m alt. 1 hour ago	2° C	-	Calm (3 kph at 325).
Seattle 49 km WSW 100m alt. 39 minutes ago		-
BUOY-WPOW1 55 km W 3m alt. 55 minutes ago	7° C		Strong winds from the N (39 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.