– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 3 am Sun 15 Nov Local Time

Updates in:

hr min s

Update imminent

Issued: 3 am Sun 15 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Drizzle at first, then turning colder with dusting of snow on Sun morning. Freeze-thaw conditions (max 2°C on Sun morning, min -1°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the ESE by Tue night).									Days 4–6 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 2°C on Wed morning, min -1°C on Fri night). Winds decreasing (fresh winds from the ESE on Wed morning, calm by Thu night).
	Sunday 15			Monday 16			Tuesday 17			Wednesday 18			Thursday 19			Friday 20
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	clear	clear	clear	clear	clear	clear	some clouds	cloudy	cloudy	some clouds	some clouds	some clouds	clear	cloudy	cloudy	light snow
Cloud base (m)	600	450	2600	2900	2000	1550	750	750		6250	2150	1900	850	2100	700	600	1550	2050
km/h	SSW	SW	SW	SW	SW	NW	NNW	NNE	ESE	ESE	ESE	ESE	ESE	E	SE	S	SE	ESE
See all weather maps
cm	1	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2
mm	1.2	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	2	1	0	0	1	0	0	1	2	2	0	0	1	1	1	1	2	2
min °C	2	0	0	0	0	-1	0	0	1	1	0	0	1	1	0	1	2	-1
chill °C	-4	-7	-6	-3	0	-1	0	0	-2	-5	-6	-5	-3	-2	0	-1	0	-3

Freezing level m	1600	1350	1250	1300	1400	1200	1200	1300	1650	1650	1350	1300	1450	1450	1450	1450	1550	1650

	7:11	—	—	7:13	—	—	7:13	—	—	7:16	—	—	7:16	—	—	7:18	—	—
	—	4:30	—	—	4:29	—	—	4:28	—	—	4:27	—	—	4:25	—	—	4:24	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Drizzle at first, then turning colder with dusting of snow on Sun morning. Freeze-thaw conditions (max 2°C on Sun morning, min -1°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the ESE by Tue night).

Mount Si Weather (Days 3-6):

A dusting of new snow. Freeze-thaw conditions (max 2°C on Wed morning, min -1°C on Fri night). Winds decreasing (fresh winds from the ESE on Wed morning, calm by Thu 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
Renton 30 km WSW 160m alt. 1 hour ago	10°C	Dry	Calm (0 kph at 91).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11°C	Light rain .	Wind obs. (6 kph from 1 degs) was rejected.	16 km Low: few Mid: overcast
Auburn 39 km SW 119m alt. 36 minutes ago	11°C	Dry	Calm (2 kph at 104).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	3°C	Light rain .	Calm (0 kph at 0).	1 km Mid: broken High: overcast
Monroe 44 km NW 80m alt. 2 hours ago	13°C	Dry	Calm (0 kph at 286).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	11°C	Light rain .	Light winds from the SSE (19 kph at 160).	11 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	10°C	Light rain .	Moderate winds from the S (24 kph at 180).	10 km Mid: few High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 1 hour ago	13°C	Dry	Light winds from the SE (19 kph at 138).
Seattle 49 km WSW 100m alt. 47 minutes ago	15°C	-	Calm (3 kph at 322).

* 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.