– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sat 11 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sat 11 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mild with light rain (total 3mm) on Sun night Becoming colder with a light covering of snow, mostly falling on Sun night. Freeze-thaw conditions (max 4°C on Sat night, min -2°C on Mon night). Winds increasing (calm on Sat night, near gales from the SSW by Tue afternoon).										Days 5–7 Weather Summary A moderate fall of snow, heaviest on Tue night. Temperatures will be below freezing (max -1°C on Tue night, min -5°C on Tue night). Winds decreasing (gales from the SW on Tue night, calm by Fri afternoon).
		Sunday 12			Monday 13			Tuesday 14			Wednesday 15			Thursday 16			Friday 17
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	light rain	light snow	light snow	light snow	some clouds	light snow	light snow	mod. snow	snow shwrs	mod. snow	snow shwrs	some clouds	some clouds	cloudy	some clouds	some clouds	some clouds
km/h	NNE	NW	NW	SW	SW	WSW	SW	SW	SSW	SW	WSW	WSW	NNW	WSW	W	NNW	NNW	NW	WNW
See all weather maps
cm	—	—	—	2	1	1	—	2	2	7	1	6	5	—	—	—	—	—	—
mm	—	—	0.2	3	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	4	4	4	4	-1	0	-1	-2	-1	-1	-4	-3	-4	-4	-2	-2	-3	-1	-1
min °C	3	4	4	0	-1	0	-2	-2	-1	-5	-5	-3	-5	-5	-2	-3	-3	-1	-2
chill °C	3	3	2	-5	-8	-6	-9	-10	-9	-14	-13	-11	-10	-8	-6	-6	-5	-1	-2

Freezing level m	2050	1950	1950	1400	1200	1300	1000	1000	1150	600	750	750	200	850	1050	900	950	1200	1000
Cloud base (m)	1800	600	700	400	450	400	600	450	400	550	450	400	450	450	650	450	550	700	800

	—	6:24	—	—	6:22	—	—	6:20	—	—	6:18	—	—	6:16	—	—	6:15	—	—
	—	—	7:51	—	—	7:52	—	—	7:53	—	—	7:55	—	—	7:57	—	—	7:58	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with light rain (total 3mm) on Sun night Becoming colder with a light covering of snow, mostly falling on Sun night. Freeze-thaw conditions (max 4°C on Sat night, min -2°C on Mon night). Winds increasing (calm on Sat night, near gales from the SSW by Tue afternoon).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Tue night. Temperatures will be below freezing (max -1°C on Tue night, min -5°C on Tue night). Winds decreasing (gales from the SW on Tue night, calm by Fri afternoon).

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. 1 hour ago	9° C	Dry	Calm (0 kph at 337).
Snoqualmie Pass 30 km ESE 824m alt. 52 minutes ago	1° C	-	Calm (0 kph at 215).
Renton 30 km WSW 160m alt. 2 hours ago	9° C	Dry	Calm (0 kph at 292).
Grotto wx 35 km NE 321m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 247).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11° C	Clear	Light winds from the NW (11 kph at 320).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	1° C	-	Calm (0 kph at 255).
Auburn 39 km SW 119m alt. 2 hours ago	12° C	Dry	Calm (0 kph at 197).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	4° C	Fog -.	Calm (0 kph at 0).	0 km Low: broken Mid: overcast
Woodinville 43 km WNW 137.2m alt. 2 hours ago	4° C	Dry	Calm (0 kph at 267).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: broken Mid: overcast

* 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.