– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Thu 23 Oct Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Thu 23 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 23mm), mostly on Fri afternoon. Becoming colder with a light covering of snow ,mostly falling on Sat night. Freeze-thaw conditions (max 9°C on Thu afternoon, min -1°C on Sat night). Winds increasing (light winds from the SSW on Fri night, severe gales from the SW by Sat night).									Days 4–6 Weather Summary A moderate fall of snow, heaviest on Sun afternoon. Freeze-thaw conditions (max 7°C on Tue night, min -1°C on Sun morning). Winds decreasing (strong winds from the SW on Sun night, calm by Tue morning).
	Thursday 23			Friday 24			Saturday 25			Sunday 26			Monday 27			Tuesday 28
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	cloudy	some clouds	light rain	heavy rain	rain shwrs	some clouds	light rain	mod. snow	cloudy	mod. snow	light snow	light snow	light snow	some clouds	some clouds	some clouds	cloudy
km/h	SSW	SSW	SSW	S	WSW	SW	SE	S	SW	S	SW	WSW	SW	SW	SW	NNE	E	SSE
See all weather maps
cm	—	—	—	—	—	—	—	—	7	—	8	3	1	2	—	—	—	—
mm	0.1	—	—	0.9	17	2	—	1.2	1.6	—	—	—	—	—	—	—	—	—
max°C	6	9	9	8	6	2	5	2	2	0	0	0	-1	0	-1	0	1	7
min°C	5	8	8	6	3	1	3	2	-1	-1	-1	-1	-1	0	-1	-1	1	2
chill°C	1	5	5	2	-1	-4	0	-4	-11	-7	-8	-8	-7	-4	-5	-1	1	-2

Freezing level (m)	2700	2900	2650	2450	1800	1450	2050	1600	1150	1200	1100	1100	1150	1250	1100	1250	1450	2400
Cloud base (m)	1900	2850	4700	2050	400	1850	5650	1450	400	550	400	550	550	750	800	750	850

	7:35	—	—	7:37	—	—	7:39	—	—	7:41	—	—	7:41	—	—	7:43	—	—
	—	6:05	—	—	6:02	—	—	6:00	—	—	5:59	—	—	5:58	—	—	5:55	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 23mm), mostly on Fri afternoon. Becoming colder with a light covering of snow ,mostly falling on Sat night. Freeze-thaw conditions (max 9°C on Thu afternoon, min -1°C on Sat night). Winds increasing (light winds from the SSW on Fri night, severe gales from the SW by Sat night).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Sun afternoon. Freeze-thaw conditions (max 7°C on Tue night, min -1°C on Sun morning). Winds decreasing (strong winds from the SW on Sun night, calm by Tue 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	14° C	Dry	Calm (0 kph at 84).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 283).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Dry and cloudy.	Light winds from the N (6 kph at 1).	16 km Low: overcast
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	8° C	Dry and cloudy.	Calm (0 kph at 0).	0.0 km Low: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and cloudy.	Light winds from the SSE (15 kph at 150).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	12° C	Dry and partly cloudy.	Light winds from the SE.(Wind varies from 080 to 160 degs) (13 kph at 140).	16 km Low: few Mid: broken High: broken
Seattle 49 km WSW 100m alt. 45 minutes ago		-	Calm (5 kph at 341).
BUOY-WPOW1 55 km W 3m alt. 58 minutes ago	14° C		Moderate winds from the SSE (26 kph at 160).
Puyallup 57 km SSW 160m alt. 2 hours ago	13° C	Dry	Calm (0 kph at 198).
BUOY-TCNW1 57 km SW 3m alt. 1 hour ago

* 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.