– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Wed 11 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Wed 11 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 35mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 8°C on Wed night, min -1°C on Fri night). Winds decreasing (strong winds from the WSW on Wed night, calm by Thu night).									Days 4–6 Weather Summary A dusting of snow giving way to moderate rain (total 12mm) heaviest on Sun night. Freeze-thaw conditions (max 7°C on Mon afternoon, min -4°C on Sat night). Wind will be generally light.
	Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15			Monday 16
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	heavy rain	heavy rain	light snow	light snow	mod. snow	mod. snow	light snow	light snow	snow shwrs	some clouds	some clouds	light rain	light rain	mod. rain	light rain	light rain	rain shwrs
km/h	S	SW	WSW	SW	WSW	WSW	WSW	WSW	WSW	W	W	E	SSE	S	SW	SSW	SW	S
See all weather maps
cm	1	—	—	1	5	10	6	3	4	2	—	—	—	—	—	—	—	—
mm	5	14	16	—	—	—	—	—	—	—	—	—	0.1	4	6	0.5	1.9	0.1
max °C	2	7	8	1	1	1	1	1	1	-1	0	-2	2	2	5	6	7	6
min °C	2	5	2	1	1	0	1	1	-1	-2	0	-4	-1	2	3	5	6	5
chill °C	0	0	-4	-5	-4	-3	1	-1	-4	-4	-3	-6	-3	1	1	3	4	4

Freezing level m	1050	1800	950	650	650	600	700	750	450	400	550	0	1000	900	2650	3350	3350	3350
Cloud base (m)	400	400	450	450	450	400	400	400	400	550	550	750	2400	550	500	450	450	450

	7:28	—	—	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—	7:18	—	—
	—	7:06	—	—	7:07	—	—	7:08	—	—	7:09	—	—	7:12	—	—	7:13	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 35mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 8°C on Wed night, min -1°C on Fri night). Winds decreasing (strong winds from the WSW on Wed night, calm by Thu night).

Mount Si Weather (Days 3-6):

A dusting of snow giving way to moderate rain (total 12mm) heaviest on Sun night. Freeze-thaw conditions (max 7°C on Mon afternoon, min -4°C on Sat night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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. 1 hour ago	6° C	Dry	Calm (0 kph at 104).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	1° C	-	Calm (0 kph at 359).
Grotto wx 35 km NE 321m alt. 52 minutes ago	1° C	Light rain.	Calm (3 kph at 40).
Renton Airport 36 km WSW 218m alt. 3 hours ago	7° C	Light rain .	Light winds from the SSE (11 kph at 160).	10 km Mid: few High: broken
Grotto wx 39 km NE 1101m alt. 1 hour ago	-1° C	-	Calm (0 kph at 62).
Auburn 39 km SW 119m alt. 1 hour ago		-	Wind obs. (8 kph from 29 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	-2° C	Heavy snow.	Calm (0 kph at 0).	0 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	0° C	-	Calm (0 kph at 322).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	7° C	Light rain .	Moderate winds from the SSE (20 kph at 160).	8 km Mid: scattered High: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	6° C	Light rain .	Moderate winds from the SSE (26 kph at 150).	5 km Mid: few High: 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.