– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sat 11 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 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 Light rain (total 4mm) at first, then becoming colder with a dusting of snow on Sun night. Freeze-thaw conditions (max 4°C on Sat night, min -2°C on Mon night). Winds increasing (calm on Sat night, strong winds from the SW by Tue morning).											Days 5–7 Weather Summary A heavy fall of snow, heaviest during Tue night. Temperatures will be below freezing (max -1°C on Tue afternoon, min -5°C on Tue night). Winds decreasing (gales from the SW on Tue night, calm by Thu night).
	Sat 11		Sunday 12			Monday 13			Tuesday 14			Wednesday 15			Thursday 16
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	some clouds	clear	rain shwrs	light snow	light snow	cloudy	cloudy	light snow	light snow	snow shwrs	light snow	mod. snow	light snow	some clouds	some clouds	some clouds
km/h	SW	NNE	NNW	WNW	SW	SW	SW	SW	SW	SW	SW	SW	W	NW	WSW	WSW	NW
See all weather maps
cm	—	—	—	—	1	1	—	—	1	3	7	3	7	4	—	—	—
mm	3	—	—	0.2	1.4	—	—	—	—	—	—	—	—	—	—	—	—
max °C	3	4	3	4	4	-1	0	-1	-2	-1	-1	-5	-3	-4	-3	-2	-2
min °C	2	3	3	4	0	-1	0	-2	-2	-1	-5	-5	-4	-5	-4	-2	-3
chill °C	-1	2	3	2	-5	-7	-7	-9	-9	-9	-15	-14	-12	-9	-7	-5	-6

Freezing level m	1850	2150	1950	1950	1450	1150	1250	1000	1050	1100	600	750	750	550	900	1050	800
Cloud base (m)	400	1750	600	650	400	450	400	500	450	400	400	500	400	650	450	650	750

	—	—	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 4mm) at first, then becoming colder with a dusting of snow on Sun night. Freeze-thaw conditions (max 4°C on Sat night, min -2°C on Mon night). Winds increasing (calm on Sat night, strong winds from the SW by Tue morning).

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 afternoon, min -5°C on Tue night). Winds decreasing (gales from the SW on Tue night, 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
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	11° C	Dry	Calm (0 kph at 322).
Snoqualmie Pass 30 km ESE 824m alt. 58 minutes ago	9° C	-	Calm (0 kph at 301).
Renton 30 km WSW 160m alt. 1 hour ago	12° C	Dry	Calm (2 kph at 86).
Grotto wx 35 km NE 321m alt. 51 minutes ago	10° C	Dry	Calm (0 kph at 273).
Renton Airport 36 km WSW 218m alt. 3 hours ago	13° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: few Mid: overcast
Grotto wx 39 km NE 1101m alt. 45 minutes ago	5° C	Dry	Calm (0 kph at 255).
Auburn 39 km SW 119m alt. 1 hour ago	20° C	Dry	Calm (0 kph at 215).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	5° C	Dry and cloudy.	Wind obs. (6 kph from 1 degs) was rejected.	16 km Low: scattered Mid: broken High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	12° C	Dry and cloudy.	Wind obs. (11 kph from 220 degs) was rejected.	16 km Low: broken Mid: broken High: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	11° C	Dry and cloudy.	Light winds from the SW (15 kph at 230).	16 km Low: scattered Mid: broken High: 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.