– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Sun 22 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Sun 22 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 1°C on Sun afternoon, min -4°C on Tue afternoon). Winds increasing (calm on Mon afternoon, fresh winds from the WSW by Wed morning).											Days 5–7 Weather Summary A light covering of new snow mostly falling on Wed afternoon. Temperatures will be below freezing (max 0°C on Thu afternoon, min -5°C on Fri night). Winds decreasing (strong winds from the WSW on Wed afternoon, light winds from the SW by Sat morning).
	Sun 22		Monday 23			Tuesday 24			Wednesday 25			Thursday 26			Friday 27
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	heavy snow	mod. snow	light snow	cloudy	cloudy	light snow	mod. snow	light snow	light snow	cloudy	cloudy	some clouds	cloudy	cloudy	cloudy	light snow
km/h	S	SSW	SW	SW	NNE	SE	SW	WSW	WSW	WSW	SW	WSW	WSW	SW	SW	SW	WSW
See all weather maps
cm	1	11	6	1	—	—	5	8	2	1	—	—	—	—	—	—	3
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	1	1	-3	-3	0	0	-2	-3	-2	-1	-2	-1	0	-2	-2	-2	-3
min °C	1	-1	-3	-3	-3	-1	-4	-4	-3	-2	-2	-2	-1	-3	-2	-3	-5
chill °C	-4	-8	-10	-7	-3	-4	-9	-8	-11	-10	-10	-9	-8	-10	-8	-11	-12

Freezing level m	1450	1450	850	900	850	1200	850	600	850	1050	900	1000	1200	950	900	950	700
Cloud base (m)	500	500	450	450	900	1650	450	400	450	550	450	450	450	600	500	450	400

	—	—	6:58	—	—	6:56	—	—	6:54	—	—	6:52	—	—	6:50	—	—
	5:40	—	—	5:43	—	—	5:44	—	—	5:45	—	—	5:46	—	—	5:49	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 1°C on Sun afternoon, min -4°C on Tue afternoon). Winds increasing (calm on Mon afternoon, fresh winds from the WSW by Wed morning).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Wed afternoon. Temperatures will be below freezing (max 0°C on Thu afternoon, min -5°C on Fri night). Winds decreasing (strong winds from the WSW on Wed afternoon, light winds from the SW by Sat morning).

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. 55 minutes ago	8° C	Dry	Calm (0 kph at 7).
Black Diamond 32 km SSW 192m alt. 38 minutes ago		-	Calm (0 kph at 114).
Renton Airport 36 km WSW 218m alt. 2 hours ago	9° C	Light rain .	Light winds from the S (6 kph at 170).	16 km Low: overcast
Auburn 39 km SW 119m alt. 27 minutes ago	1° C	-	Calm (0 kph at 271).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1° C	Moderate rain .	Calm (0 kph at 0).	16 km Low: few Mid: broken High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	9° C	Light rain .	Calm (0 kph at 0).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	9° C	Light rain .	Wind obs. (7 kph from 1 degs) was rejected.	14 km Low: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	7° C	Dry	Calm (3 kph at 15).
SHIP457 54 km W -m alt. 3 hours ago	10° C	-	Light winds from the ESE (13 kph at 120).
SHIP7263 54 km W 15m alt. 2 hours ago			Light winds from the S (8 kph at 190).	- 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.