– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Tue 27 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Tue 27 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A moderate fall of snow, heaviest on Tue night. Freeze-thaw conditions (max 2°C on Tue afternoon, min -1°C on Wed night). Winds decreasing (strong winds from the SW on Tue night, light winds from the SSE by Thu morning).											Days 5–7 Weather Summary A light covering of new snow mostly falling on Fri afternoon. Freeze-thaw conditions (max 9°C on Mon morning, min -1°C on Fri afternoon). Wind will be generally light.
	Tue 27		Wednesday 28			Thursday 29			Friday 30			Saturday 31			Sunday 1
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	snow shwrs	light snow	light snow	snow shwrs	some clouds	clear	some clouds	light snow	snow shwrs	some clouds	cloudy	cloudy	cloudy	some clouds	some clouds	clear
Cloud base (m)	400	400	450	450	1800	1550	1850	1900	650	400	1600	1650	1800	650	500	700	450
km/h	SW	SW	SW	SW	SSW	ESE	ESE	ESE	SE	SW	S	SE	ENE	S	WNW	N	E
See all weather maps
cm	2	7	2	2	1	—	—	—	1	5	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	2	1	0	0	0	1	2	2	0	0	1	1	2	1	0	0	6
min °C	2	0	0	0	-1	0	2	1	0	-1	1	1	1	-1	-1	0	0
chill °C	-4	-7	-7	-6	-6	-2	-1	-3	-4	-6	-2	-2	-1	-4	-4	0	-3

Freezing level m	1550	1400	1300	1350	1100	1400	1500	1600	1250	1250	1500	1450	1450	1200	1250	1350	2900

	—	—	7:43	—	—	7:45	—	—	7:47	—	—	7:48	—	—	6:50	—	—
	5:58	—	—	5:55	—	—	5:53	—	—	5:52	—	—	5:51	—	—	4:50	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow, heaviest on Tue night. Freeze-thaw conditions (max 2°C on Tue afternoon, min -1°C on Wed night). Winds decreasing (strong winds from the SW on Tue night, light winds from the SSE by Thu morning).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Fri afternoon. Freeze-thaw conditions (max 9°C on Mon morning, min -1°C on Fri 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Renton 30 km WSW 160m alt. 59 minutes ago	11°C	Dry	Wind obs. (6 kph from 237 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Wind obs. (24 kph from 170 degs) was rejected.	16 km Low: broken
Auburn 39 km SW 119m alt. 2 hours ago	21°C	Dry	Calm (0 kph at 208).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2°C	Dry and cloudy.	Light winds from the W.(Wind varies from 210 to 320 degs) (15 kph at 280).	16 km Low: few Mid: broken High: overcast
Monroe 44 km NW 80m alt. 54 minutes ago	12°C	Dry	Calm (0 kph at 299).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Light winds from the S (17 kph at 190).	16 km Low: broken Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Moderate winds from the S (26 kph at 190).	16 km Low: few Mid: broken High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 42 minutes ago	8°C	Light rain.	Calm (0 kph at 93).
Seattle 49 km WSW 100m alt. 1 hour ago		-	Calm (0 kph at 15).

* 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.