– Lat/Long: 47.51° N 121.74° W

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

Issued: 3 am Sun 22 Feb 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 Sun night. Freeze-thaw conditions (max 2°C on Sun night, min -4°C on Tue afternoon). Winds decreasing (strong winds from the SW on Sun night, calm by Mon night).									Days 4–6 Weather Summary Mostly dry. Temperatures will be below freezing (max 0°C on Fri afternoon, min -3°C on Wed morning). Winds increasing (calm on Thu morning, fresh winds from the SW by Fri morning).
	Sunday 22			Monday 23			Tuesday 24			Wednesday 25			Thursday 26			Friday 27
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

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

Freezing level m	1400	1350	1550	1250	1050	1100	1100	750	600	850	1000	700	1000	1050	950	1050	1250	800
Cloud base (m)	850	550	550	400	400	400	400	400	450	600	500	600	500	650	650	650	600	500

	6:58	—	—	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 2°C on Sun night, min -4°C on Tue afternoon). Winds decreasing (strong winds from the SW on Sun night, calm by Mon night).

Mount Si Weather (Days 3-6):

Mostly dry. Temperatures will be below freezing (max 0°C on Fri afternoon, min -3°C on Wed morning). Winds increasing (calm on Thu morning, fresh winds from the SW by Fri 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. 39 minutes ago	6° C	Dry	Calm (0 kph at 347).
Black Diamond 32 km SSW 192m alt. 36 minutes ago		-	Wind obs. (10 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	10° C	Light rain .	Light winds from the SE (15 kph at 130).	16 km Low: overcast
Auburn 39 km SW 119m alt. 2 hours ago	-2° C	-	Calm (2 kph at 40).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-3° C	Light snow.	Wind obs. (7 kph from 1 degs) was rejected.	1 km Mid: broken High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Light winds from the SE (19 kph at 140).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Moderate winds from the E (24 kph at 100).	16 km Low: overcast
Snohomish 49 km NW 196m alt. 51 minutes ago	7° C	Dry	Light winds from the E (10 kph at 84).
Seattle 49 km WSW 100m alt. 2 hours ago		-	Wind obs. (18 kph from 13 degs) was rejected.
SHIP3444 54 km W 15m alt. 3 hours ago			Light winds from the ESE (12 kph at 120).	- 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.