– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Mon 13 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Mon 13 Apr 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 Tue night. Freeze-thaw conditions (max 1°C on Mon afternoon, min -5°C on Tue night). Mainly gales.											Days 5–7 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 7°C on Sat night, min -3°C on Thu night). Winds increasing (calm on Fri night, fresh winds from the SE by Sat night).
	Mon 13		Tuesday 14			Wednesday 15			Thursday 16			Friday 17			Saturday 18
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	light snow	light snow	mod. snow	light snow	light snow	snow shwrs	some clouds	some clouds	snow shwrs	cloudy	some clouds	some clouds	clear	some clouds	some clouds
km/h	WSW	SW	SW	SW	WSW	SW	SW	NW	WNW	WNW	WSW	SW	WNW	SE	SE	SE	ESE
See all weather maps
cm	—	—	1	4	7	2	4	7	—	—	1	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	1	0	-1	-1	0	-5	-4	-4	-4	-1	-1	-2	-1	0	2	6	7
min °C	0	-2	-1	-1	-5	-5	-4	-5	-5	-1	-3	-3	-1	-2	1	5	6
chill °C	-6	-9	-9	-9	-9	-11	-10	-11	-9	-5	-8	-7	-1	-2	-2	3	2

Freezing level m	1350	1050	1150	1150	600	650	750	450	850	1200	900	950	1200	950	1550	2000	2400
Cloud base (m)	400	650	450	400	400	450	450	450	450	900	450	450	700	600	600	1850	2900

	—	—	6:20	—	—	6:18	—	—	6:16	—	—	6:15	—	—	6:13	—	—
	7:52	—	—	7:53	—	—	7:55	—	—	7:57	—	—	7:58	—	—	—	8:00

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 1°C on Mon afternoon, min -5°C on Tue night). Mainly gales.

Mount Si Weather (Days 3-6):

A dusting of new snow. Freeze-thaw conditions (max 7°C on Sat night, min -3°C on Thu night). Winds increasing (calm on Fri night, fresh winds from the SE 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. 42 minutes ago	8° C	Dry	Calm (0 kph at 23).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	3° C	-	Calm (0 kph at 103).
Renton 30 km WSW 160m alt. 1 hour ago	8° C	Dry	Light winds from the SSW (8 kph at 198).
Black Diamond 32 km SSW 192m alt. 48 minutes ago		-	Calm (3 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	7° C	Dry	Calm (0 kph at 269).
Renton Airport 36 km WSW 218m alt. 3 hours ago	11° C	Dry and cloudy.	Light winds from the S (13 kph at 190).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 50 minutes ago	1° C	-	Calm (0 kph at 128).
Auburn 39 km SW 119m alt. 1 hour ago	15° C	Dry	Calm (2 kph at 215).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	-	Light winds from the W.(Wind varies from 230 to 320 degs) (13 kph at 280).	0.0 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	6° C	Dry	Wind obs. (8 kph from 308 degs) was rejected.

* 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.