– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Sat 21 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Sat 21 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 2°C on Sat night, min -2°C on Mon night). Winds decreasing (strong winds from the ESE on Sat night, calm by Mon afternoon).									Days 4–6 Weather Summary A light covering of new snow mostly falling on Tue night. Temperatures will be below freezing (max -1°C on Thu morning, min -4°C on Tue night). Winds increasing (calm on Tue morning, strong winds from the WSW by Thu night).
	Saturday 21			Sunday 22			Monday 23			Tuesday 24			Wednesday 25			Thursday 26
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	cloudy	light snow	light snow	mod. snow	light snow	light snow	cloudy	cloudy	light snow	light snow	some clouds	some clouds	clear	clear	clear	some clouds
km/h	ESE	ESE	SE	SE	SW	SSW	SW	W	SSW	NNW	WNW	WSW	SW	WSW	SW	SW	SW	WSW
See all weather maps
cm	—	—	—	2	2	6	4	4	—	—	2	4	—	—	—	—	—	—
mm	—	—	—	0.5	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	0	1	2	2	1	2	0	-1	-1	-2	-3	-4	-3	-2	-3	-1	-1	-1
min °C	-1	0	1	-1	0	0	0	-1	-2	-2	-3	-4	-4	-3	-4	-2	-2	-2
chill °C	-9	-8	-7	-5	-6	-4	0	-1	-2	-2	-7	-12	-9	-7	-9	-8	-10	-10

Freezing level m	1100	1400	1550	1700	1200	1550	1200	1150	1100	1000	850	650	750	1000	450	1050	1150	950
Cloud base (m)	2100	1500	2400	1600	600	600	400	400	550	550	400	450	450	550	650	550	1750	700

	7:01	—	—	6:58	—	—	6:58	—	—	6:56	—	—	6:54	—	—	6:52	—	—
	—	5:39	—	—	5:40	—	—	5:43	—	—	5:44	—	—	5:45	—	—	5:46	—

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 Sat night, min -2°C on Mon night). Winds decreasing (strong winds from the ESE on Sat night, calm by Mon afternoon).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Tue night. Temperatures will be below freezing (max -1°C on Thu morning, min -4°C on Tue night). Winds increasing (calm on Tue morning, strong winds from the WSW by Thu 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	7° C	Dry	Calm (0 kph at 142).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 352).
Renton Airport 36 km WSW 218m alt. 3 hours ago	6° C	Light rain .	Wind obs. (15 kph from 120 degs) was rejected.	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	11° C	Dry	Calm (3 kph at 11).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	-5° C	Light snow.	Wind obs. (6 kph from 1 degs) was rejected.	0 km Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	6° C	Light rain .	Wind obs. (13 kph from 140 degs) was rejected.	10 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	5° C	Light rain .	Light winds from the ESE (17 kph at 110).	10 km Low: overcast
Snohomish 49 km NW 196m alt. 54 minutes ago	6° C	Dry	Light winds from the E (13 kph at 86).
Seattle 49 km WSW 100m alt. 44 minutes ago		-	Wind obs. (10 kph from 247 degs) was rejected.
SHIP3131 54 km W 15m alt. 2 hours ago			Light winds from the E (12 kph at 90).	- 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.