– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Mon 09 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Mon 09 Mar 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 Mon night. Becoming milder with moderate rain (total 13mm) on Wed night. Freeze-thaw conditions (max 3°C on Wed night, min -7°C on Mon night). Winds increasing (moderate winds from the WSW on Mon night, stormy winds from the SW by Wed night).											Days 5–7 Weather Summary Heavy rain (total 46mm) on Fri morning. Becoming colder with heavy fall of snow, heaviest during Fri morning. Freeze-thaw conditions (max 3°C on Thu night, min -7°C on Fri night). Winds decreasing (gales from the SW on Thu night, calm by Sat night).
	Mon 9		Tuesday 10			Wednesday 11			Thursday 12			Friday 13			Saturday 14
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	heavy snow	snow shwrs	light snow	mod. snow	mod. snow	mod. snow	light snow	light snow	mod. snow	mod. snow	mod. snow	mod. snow	heavy snow	snow shwrs	some clouds	some clouds
km/h	WSW	WSW	SW	SSW	SW	SSW	SW	WSW	WSW	WSW	SW	WSW	NW	SW	NW	N	NNE
See all weather maps
cm	5	11	1	2	6	7	7	2	4	9	10	8	9	11	1	—	—
mm	—	—	—	—	—	—	—	13	—	—	27	19	—	—	—	—	—
max °C	-5	-6	-6	-5	-3	-2	1	3	-3	-3	3	3	-1	-5	-6	-5	-2
min °C	-5	-7	-7	-5	-4	-2	0	-3	-3	-3	-2	2	-4	-7	-7	-6	-6
chill °C	-14	-15	-14	-12	-12	-10	-8	-13	-12	-11	-8	-6	-9	-14	-10	-10	-12

Freezing level m	650	250	500	550	700	950	1500	1000	800	800	1850	1700	650	300	500	650	0
Cloud base (m)	400	400	450	750	450	400	400	500	500	400	400	400	400	450	650	500	450

	—	—	7:30	—	—	7:28	—	—	7:26	—	—	7:24	—	—	7:22	—	—
	7:02	—	—	7:04	—	—	7:06	—	—	7:07	—	—	7:08	—	—	7:09	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Mon night. Becoming milder with moderate rain (total 13mm) on Wed night. Freeze-thaw conditions (max 3°C on Wed night, min -7°C on Mon night). Winds increasing (moderate winds from the WSW on Mon night, stormy winds from the SW by Wed night).

Mount Si Weather (Days 3-6):

Heavy rain (total 46mm) on Fri morning. Becoming colder with heavy fall of snow, heaviest during Fri morning. Freeze-thaw conditions (max 3°C on Thu night, min -7°C on Fri night). Winds decreasing (gales from the SW on Thu night, calm by Sat 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. 29 minutes ago	2° C	-	Calm (0 kph at 318).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	-2° C	-	Calm (2 kph at 167).
Grotto wx 35 km NE 321m alt. 1 hour ago	0° C	-	Calm (0 kph at 114).
Renton Airport 36 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Light winds from the SSW (9 kph at 200).	16 km Low: scattered Mid: broken High: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	-4° C	-	Calm (0 kph at 233).
Auburn 39 km SW 119m alt. 43 minutes ago	9° C	Dry	Calm (0 kph at 193).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-5° C	-	Light winds from the W.(Wind varies from 240 to 310 degs) (19 kph at 280).	0.0 km High: broken
Woodinville 43 km WNW 137.2m alt. 25 minutes ago	-2° C	-	Calm (2 kph at 281).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and cloudy.	Light winds from the E (7 kph at 100).	16 km Low: broken Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and partly cloudy.	Light winds from the SW (17 kph at 220).	16 km Low: broken Mid: broken

* 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.