– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Fri 26 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Fri 26 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A heavy fall of snow, heaviest during Fri night. Freeze-thaw conditions (max 3°C on Mon afternoon, min -6°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri night, calm by Mon afternoon).										Days 5–7 Weather Summary Mostly dry. Mild temperatures (max 9°C on Wed morning, min 3°C on Thu afternoon). Wind will be generally light.
		Saturday 27			Sunday 28			Monday 29			Tuesday 30			Wednesday 31			Thursday 1
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy snow	some clouds	cloudy	light snow	some clouds	some clouds	some clouds	clear	some clouds	some clouds	some clouds	clear	some clouds	cloudy	some clouds	some clouds	cloudy	cloudy	light rain
km/h	W	W	SW	SW	NNW	N	N	N	NNW	NNE	S	SW	SE	SE	SSW	SSW	SW	WSW	SW
See all weather maps
cm	19	—	—	2	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2
max °C	-5	-5	-5	-4	-2	-1	1	2	3	5	6	6	8	9	8	8	6	3	3
min °C	-6	-6	-6	-5	-3	-2	0	2	3	4	6	6	6	9	8	7	4	3	1
chill °C	-10	-8	-13	-12	-7	-7	-4	-1	3	2	5	5	6	8	7	6	1	1	-4

Freezing level m	450	400	450	450	700	800	1000	2100	2300	2900	2850	2800	3100	3250	3200	3200	2750	2000	1600
Cloud base (m)	400	450	450	450	500	650	750	750	500	450	450	500		5400	6100			2250	1450

	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—
	—	—	4:22	—	—	4:22	—	—	4:22	—	—	4:23	—	—	4:24	—	—	4:25	—

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 Mon afternoon, min -6°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri night, calm by Mon afternoon).

Mount Si Weather (Days 3-6):

Mostly dry. Mild temperatures (max 9°C on Wed morning, min 3°C on Thu afternoon). 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. 42 minutes ago	2° C	-	Calm (0 kph at 357).
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	4° C	Dry and cloudy.	Light winds from the S (9 kph at 190).	16 km Low: scattered Mid: overcast
Auburn 39 km SW 119m alt. 39 minutes ago	4° C	Dry	Calm (0 kph at 144).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-4° C	Moderate snow.	Light winds from the WNW.(Wind varies from 250 to 330 degs) (13 kph at 290).	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	3° C	Dry and partly cloudy.	Light winds from the SSE (11 kph at 160).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and cloudy.	Light winds from the SSW (13 kph at 210).	16 km Low: few Mid: scattered High: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	1° C	-	Calm (0 kph at 234).
Seattle 49 km WSW 100m alt. 1 hour ago		-
SHIP9045 55 km SW 15m alt. 3 hours ago				- km

* 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.