– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Wed 17 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Wed 17 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 4mm) on Thu afternoon. Becoming colder with heavy fall of snow, heaviest during Thu afternoon. Freeze-thaw conditions (max 5°C on Thu afternoon, min -5°C on Thu night). Mainly gales.										Days 5–7 Weather Summary A heavy fall of snow, heaviest during Mon night. Temperatures will be below freezing (max 0°C on Sun morning, min -4°C on Mon night). Winds decreasing (near gales from the SW on Mon night, light winds from the SSW by Tue morning).
		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
	night	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	snow shwrs	light snow	mod. snow	light snow	light snow	light snow	mod. snow	cloudy	cloudy	cloudy
km/h	SW	SE	SW	WSW	WSW	WSW	SW	SW	SW	SSW	SSW	WSW	SW	SSW	S	SW	SW	ESE	E
See all weather maps
cm	5	3	6	7	2	2	5	2	1	1	3	6	3	2	1	9	—	—	—
mm	—	—	4	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max°C	-1	1	5	1	-4	-4	-3	-3	-2	-1	0	-2	-3	-1	-1	-3	-4	-2	-1
min°C	-2	-1	1	-5	-4	-4	-4	-3	-2	-2	-1	-3	-3	-2	-1	-4	-4	-3	-3
chill°C	-10	-7	-7	-14	-13	-14	-13	-11	-10	-9	-9	-12	-11	-9	-8	-13	-10	-6	-3

Freezing level (m)	1050	1100	2400	800	700	750	800	850	950	900	1200	1000	800	900	1150	750	700	750	900
Cloud base (m)	400	350	300	400	450	400	450	400	400	650	550	450	400	400	500	400	500	650	350

	—	7:50	—	—	7:50	—	—	7:50	—	—	7:50	—	—	7:52	—	—	7:52	—	—
	—	—	4:16	—	—	4:16	—	—	4:16	—	—	4:17	—	—	4:17	—	—	4:19	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm) on Thu afternoon. Becoming colder with heavy fall of snow, heaviest during Thu afternoon. Freeze-thaw conditions (max 5°C on Thu afternoon, min -5°C on Thu night). Mainly gales.

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Mon night. Temperatures will be below freezing (max 0°C on Sun morning, min -4°C on Mon night). Winds decreasing (near gales from the SW on Mon night, light winds from the SSW 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. 27 minutes ago	7° C	Dry	Calm (2 kph at 55).
Black Diamond 32 km SSW 192m alt. 1 hour ago	11° C	Dry	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Light rain .	Light winds from the S (7 kph at 170).	14 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 34 minutes ago	1° C	-	Calm (0 kph at 155).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-2° 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	7° C	Light rain .	Moderate winds from the SE (20 kph at 140).	13 km Low: scattered Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Light winds from the SE (17 kph at 130).	16 km Low: broken Mid: overcast
Snohomish 49 km NW 196m alt. 2 hours ago	8° C	Dry	Light winds from the SSE (14 kph at 153).
Seattle 49 km WSW 100m alt. 1 hour ago	15° C	-
BUOY-WPOW1 55 km W 3m alt. 39 minutes ago	8° C		Strong winds from the S (45 kph at 180).

* 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.