– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Tue 23 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Tue 23 Dec 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 6°C on Wed morning, min -2°C on Fri morning). Winds decreasing (severe gales from the SW on Wed afternoon, calm by Thu night).											Days 5–7 Weather Summary A light covering of new snow mostly falling on Fri afternoon. Freeze-thaw conditions (max 7°C on Mon morning, min -5°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri afternoon, calm by Sun night).
	Tue 23		Wednesday 24			Thursday 25			Friday 26			Saturday 27			Sunday 28
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	light rain	light snow	some clouds	some clouds	light snow	snow shwrs	cloudy	light snow	light snow	some clouds	some clouds	some clouds	some clouds	clear	clear
km/h	E	ESE	SE	SW	E	ESE	SSW	WSW	W	WSW	W	SSW	SW	W	NNW	N	NE
See all weather maps
cm	—	—	—	1	—	—	2	1	—	3	4	—	—	—	—	—	—
mm	—	—	0.2	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	0	5	6	0	4	4	0	0	-1	-1	-4	-4	-4	-1	2	3	5
min °C	-1	1	6	-1	-1	3	0	-1	-2	-2	-5	-4	-4	-4	0	2	2
chill °C	-4	-4	0	-7	-4	-1	-5	-3	-5	-8	-11	-9	-9	-7	-3	-1	2

Freezing level m	1100	1550	2700	1300	1600	2000	1250	1200	1000	1050	600	650	700	650	1450	2200	3000
Cloud base (m)	1700	1700	2000	800	500	1450	800	500	700	400	400	450	500	450	500	650	450

	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:54	—	—	7:54	—	—
	4:19	—	—	4:20	—	—	4:20	—	—	4:21	—	—	4:22	—	—	4:22	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 6°C on Wed morning, min -2°C on Fri morning). Winds decreasing (severe gales from the SW on Wed afternoon, calm by Thu night).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Fri afternoon. Freeze-thaw conditions (max 7°C on Mon morning, min -5°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri afternoon, calm by Sun 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. 1 hour ago	3° C	Dry	Calm (0 kph at 348).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Light winds from the NW (7 kph at 320).	16 km Low: scattered Mid: overcast
Auburn 39 km SW 119m alt. 3 hours ago	6° C	Dry	Calm (0 kph at 131).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-2° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: few Mid: scattered High: broken
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	7° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Light winds from the N (13 kph at 0).	16 km Low: few Mid: scattered High: overcast
Snohomish 49 km NW 196m alt. 2 hours ago	3° C	Dry	Light winds from the NNE (8 kph at 17).
Seattle 49 km WSW 100m alt. 26 minutes ago		-
BUOY-WPOW1 55 km W 3m alt. 37 minutes ago	7° C		Light winds from the N (8 kph at 0).

* 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.