– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Tue 10 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Tue 10 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 4°C on Wed afternoon, min -2°C on Fri afternoon). Wind will be generally light.										Days 5–7 Weather Summary A moderate fall of snow, heaviest on Fri night. Freeze-thaw conditions (max 3°C on Sun night, min -3°C on Fri night). Winds increasing (calm on Sat morning, strong winds from the ESE by Sun night).
		Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15			Monday 16
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	some clouds	some clouds	some clouds	some clouds	light snow	light snow	light snow	cloudy	light snow	mod. snow	light snow	light snow	some clouds	some clouds	some clouds	snow shwrs
km/h	NE	ESE	SE	SW	SW	SW	SW	WSW	SW	SW	SSW	NNE	SE	S	SSW	E	ESE	ESE	ESE
See all weather maps
cm	—	—	—	—	—	—	—	2	2	5	—	2	6	4	1	—	—	—	1
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	2	3	4	3	1	1	0	-1	-2	-2	-1	-2	-2	-2	-1	3	3	3	4
min °C	1	3	3	1	1	0	-1	-1	-2	-3	-2	-2	-2	-2	-2	0	1	1	-3
chill °C	-2	1	3	-2	-3	-5	-6	-7	-7	-7	-5	-2	-4	-6	-6	-3	-4	-4	-9

Freezing level m	1600	1750	1950	2000	1400	1350	1150	1150	1000	900	1000	1050	950	950	950	1600	1800	1400	1750
Cloud base (m)		8700	8350	7000	3450	2650	850	450	400	400	400	400	400	400	350	450	2500	400	400

	—	7:18	—	—	7:16	—	—	7:15	—	—	7:13	—	—	7:11	—	—	7:09	—	—
	—	—	5:23	—	—	5:24	—	—	5:27	—	—	5:29	—	—	5:30	—	—	5:31	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 4°C on Wed afternoon, min -2°C on Fri afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Fri night. Freeze-thaw conditions (max 3°C on Sun night, min -3°C on Fri night). Winds increasing (calm on Sat morning, strong winds from the ESE by Sun 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	2° C	-	Calm (0 kph at 32).
Black Diamond 32 km SSW 192m alt. 53 minutes ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Clear	Light winds from the N (15 kph at 350).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	6° C	Dry	Calm (0 kph at 175).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-3° C	Clear	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	7° C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	7° C	Clear	Moderate winds from the NNE (24 kph at 20).	16 km
Snohomish 49 km NW 196m alt. 34 minutes ago	1° C	-	Calm (0 kph at 325).
SHIP4722 54 km W 15m alt. 3 hours ago			Light winds from the NNW (10 kph at 330).	- km
SHIP2992 54 km W 15m alt. 1 hour ago			Calm (4 kph at 340).	- 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.