– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sun 29 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sun 29 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 2°C on Tue afternoon, min -6°C on Sun night). Winds increasing (calm on Mon afternoon, fresh winds from the ESE by Wed morning).										Days 5–7 Weather Summary A light covering of new snow mostly falling on Wed night. Freeze-thaw conditions (max 3°C on Sat morning, min -4°C on Wed night). Wind will be generally light.
		Monday 30			Tuesday 31			Wednesday 1			Thursday 2			Friday 3			Saturday 4
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. snow	clear	some clouds	some clouds	cloudy	some clouds	light snow	light snow	light snow	light snow	light snow	snow shwrs	some clouds	some clouds	clear	clear	some clouds	some clouds	rain shwrs
km/h	NNW	NNE	NNE	ESE	SE	W	ESE	ESE	S	WSW	WNW	W	WSW	NNW	NNW	NW	NNW	WNW	SW
See all weather maps
cm	6	—	—	—	—	—	1	1	4	4	2	1	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1
max °C	-4	-4	-2	0	1	2	1	0	0	-2	-3	-1	-1	0	2	2	3	3	2
min °C	-6	-5	-3	-1	0	1	-2	0	-1	-4	-4	-2	-2	-1	1	2	2	3	-1
chill °C	-13	-10	-3	-4	-3	0	-6	-5	-4	-10	-10	-6	-5	-1	-1	2	0	2	-4

Freezing level m	400	700	1050	1250	1400	1450	1200	1200	1200	800	800	1100	1100	1300	1550	1850	1750	1750	1250
Cloud base (m)	650	450	800	400	4500	2100	1400	550	350	450	450	450	500	500	900	2400	2000	1600	500

	—	6:50	—	—	6:48	—	—	6:46	—	—	6:43	—	—	6:41	—	—	6:39	—	—
	—	—	7:32	—	—	7:34	—	—	7:36	—	—	7:37	—	—	7:38	—	—	7:39	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 2°C on Tue afternoon, min -6°C on Sun night). Winds increasing (calm on Mon afternoon, fresh winds from the ESE by Wed morning).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Wed night. Freeze-thaw conditions (max 3°C on Sat morning, min -4°C on Wed night). Wind will be generally light.

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	0° C	-	Calm (0 kph at 353).
Renton 30 km WSW 160m alt. 49 minutes ago	1° C	-	Calm (0 kph at 41).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (5 kph at 0).
Renton Airport 36 km WSW 218m alt. 1 hour ago	2° C	Mist -.	Calm (0 kph at 0).	3 km Low: broken
Auburn 39 km SW 119m alt. 2 hours ago	8° C	Dry	Calm (0 kph at 97).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-5° C	-	Light winds from the N (6 kph at 1).	0.0 km High: broken
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	3° C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	2° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: few Mid: broken
Snohomish 49 km NW 196m alt. 1 hour ago	2° C	-	Calm (2 kph at 221).
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	4° C		Light winds from the WSW (9 kph at 240).

* 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.