– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Fri 13 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Fri 13 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A heavy fall of snow, heaviest during Fri morning. Freeze-thaw conditions (max 2°C on Sun night, min -7°C on Sat morning). Winds increasing (calm on Sat night, fresh winds from the SW by Sun night).									Days 4–6 Weather Summary Heavy rain (total 31mm), heaviest during Wed afternoon. Mild temperatures (max 6°C on Mon afternoon, min 3°C on Mon morning). Winds increasing (moderate winds from the SW on Tue night, strong winds from the SW by Wed night).
	Friday 13			Saturday 14			Sunday 15			Monday 16			Tuesday 17			Wednesday 18
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy snow	heavy snow	heavy snow	mod. snow	light snow	some clouds	some clouds	light snow	light snow	light rain	light rain	rain shwrs	light rain	light rain	light rain	light rain	mod. rain	heavy rain
km/h	SW	SW	W	NW	WNW	N	S	SSW	SW	SW	SW	SW	SW	SW	SW	SSW	SSW	SSW
See all weather maps
cm	13	12	17	9	2	—	—	1	2	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	0.8	1.3	4	0.2	3	0.8	1.8	0.4	8	11
max °C	-2	-2	-2	-7	-6	-6	-1	-2	2	3	6	5	3	4	5	6	6	6
min °C	-2	-2	-6	-7	-6	-6	-3	-2	-1	3	4	5	3	4	4	6	5	4
chill °C	-7	-7	-14	-13	-10	-6	-3	-7	-7	-3	-2	0	-3	-2	-1	2	-1	-3

Freezing level m	800	750	400	350	450	0	1100	900	2100	3000	2850	2450	2350	2350	2250	2650	2800	3000
Cloud base (m)	400	400	400	450	550	950	700	550	500	700	450	400	750	450	450	500	400	600

	7:24	—	—	7:22	—	—	7:20	—	—	7:18	—	—	7:16	—	—	7:13	—	—
	—	7:08	—	—	7:09	—	—	7:12	—	—	7:13	—	—	7:14	—	—	7:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Fri morning. Freeze-thaw conditions (max 2°C on Sun night, min -7°C on Sat morning). Winds increasing (calm on Sat night, fresh winds from the SW by Sun night).

Mount Si Weather (Days 3-6):

Heavy rain (total 31mm), heaviest during Wed afternoon. Mild temperatures (max 6°C on Mon afternoon, min 3°C on Mon morning). Winds increasing (moderate winds from the SW on Tue night, strong winds from the SW 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. 49 minutes ago	3° C	Dry	Calm (0 kph at 118).
Black Diamond 32 km SSW 192m alt. 54 minutes ago		-	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 49 minutes ago	1° C	-	Calm (0 kph at 124).
Renton Airport 36 km WSW 218m alt. 2 hours ago	1° C	-	Calm (0 kph at 0).	0.0 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	-1° C	-	Calm (0 kph at 153).
Auburn 39 km SW 119m alt. 1 hour ago		-	Wind obs. (6 kph from 23 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	-3° C	Moderate snow.	Light winds from the N (6 kph at 1).	0 km
Woodinville 43 km WNW 137.2m alt. 3 hours ago	1° C	-	Calm (0 kph at 299).
SHIP8692 44 km SW 15m alt. 4 hours ago				- km
SHIP4966 44 km SW 15m alt. 4 hours ago				- km

* 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.