– Lat/Long: 47.51° N 121.74° W

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

Issued: 10 am Sat 11 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 9mm) at first, then becoming colder with a dusting of snow on Mon morning. Freeze-thaw conditions (max 4°C on Sat morning, min -2°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the SW by Mon afternoon).									Days 4–6 Weather Summary A heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -1°C on Tue morning, min -6°C on Wed morning). Winds decreasing (near gales from the SSW on Tue night, light winds from the W by Wed night).
	Saturday 11			Sunday 12			Monday 13			Tuesday 14			Wednesday 15			Thursday 16
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light rain	some clouds	clear	rain shwrs	light rain	light snow	light snow	cloudy	cloudy	light snow	snow shwrs	light snow	snow shwrs	snow shwrs	some clouds	snow shwrs	light snow
km/h	WSW	SW	NW	NW	WNW	SW	SW	WSW	SW	SW	SW	SW	SW	NW	NNW	SW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	1	1	—	—	3	7	3	6	1	—	2	3
mm	4	4	—	—	0.2	1.2	—	—	—	—	—	—	—	—	—	—	—	—
max °C	4	3	3	3	4	4	-1	0	-1	-1	-1	-1	-5	-3	-4	-3	-2	-1
min °C	3	2	3	3	4	0	-1	0	-2	-2	-1	-5	-6	-4	-4	-4	-2	-3
chill °C	0	-1	1	1	2	-5	-7	-7	-9	-10	-9	-15	-15	-11	-10	-8	-8	-9

Freezing level m	1900	1850	2100	1950	2050	1500	1200	1250	1000	1100	1100	600	650	850	200	900	1050	800
Cloud base (m)	600	400	1750	600	650	400	450	400	400	550	400	400	450	450	800	500	450	450

	6:26	—	—	6:24	—	—	6:22	—	—	6:20	—	—	6:18	—	—	6:16	—	—
	—	7:50	—	—	7:51	—	—	7:52	—	—	7:53	—	—	7:55	—	—	7:57	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 9mm) at first, then becoming colder with a dusting of snow on Mon morning. Freeze-thaw conditions (max 4°C on Sat morning, min -2°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the SW by Mon afternoon).

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -1°C on Tue morning, min -6°C on Wed morning). Winds decreasing (near gales from the SSW on Tue night, light winds from the W by Wed 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. 2 hours ago	13° C	Dry	Calm (2 kph at 131).
Snoqualmie Pass 30 km ESE 824m alt. 49 minutes ago	7° C	-	Calm (0 kph at 247).
Renton 30 km WSW 160m alt. 3 hours ago	9° C	Dry	Calm (3 kph at 205).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (5 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 184).
Renton Airport 36 km WSW 218m alt. 1 hour ago	10° C	Light rain .	Light winds from the S (15 kph at 180).	10 km Mid: broken High: broken
Grotto wx 39 km NE 1101m alt. 57 minutes ago	4° C	Dry	Calm (0 kph at 219).
Auburn 39 km SW 119m alt. 53 minutes ago	22° C	Dry	Calm (5 kph at 204).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Fog -.	Wind obs. (6 kph from 1 degs) was rejected.	0 km
Woodinville 43 km WNW 137.2m alt. 54 minutes ago	10° C	Dry	Calm (5 kph at 330).

* 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.