– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Sat 03 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Sat 03 Jan 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 Tue morning. Freeze-thaw conditions (max 3°C on Sat night, min -4°C on Mon morning). Winds increasing (light winds from the SSW on Sun afternoon, near gales from the WSW by Tue afternoon).										Days 5–7 Weather Summary A heavy fall of snow, heaviest during Wed afternoon. Freeze-thaw conditions (max 2°C on Fri afternoon, min -5°C on Tue night). Winds decreasing (gales from the SW on Wed afternoon, moderate winds from the SW by Fri morning).
		Sunday 4			Monday 5			Tuesday 6			Wednesday 7			Thursday 8			Friday 9
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	snow shwrs	mod. snow	light snow	snow shwrs	light snow	light snow	mod. snow	light snow	light snow	light snow	mod. snow	mod. snow	light snow	light snow	light snow	cloudy	some clouds	cloudy
km/h	S	SW	SSW	SSW	SW	SW	SW	SSW	SW	WSW	SW	SW	WSW	WSW	WSW	WSW	SW	SW	SSW
See all weather maps
cm	5	2	6	1	2	2	3	7	2	5	3	7	7	2	2	2	—	—	—
mm	0.1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	3	-1	-1	-1	-4	-3	-3	-2	-1	-4	-4	-3	-4	-4	-3	-1	0	2	4
min °C	0	-1	-1	-3	-4	-4	-4	-3	-3	-5	-4	-3	-5	-4	-3	-2	-1	1	3
chill °C	-6	-10	-6	-10	-11	-11	-12	-12	-13	-13	-14	-14	-14	-14	-12	-10	-7	-4	-2

Freezing level m	1550	1150	1100	950	750	800	750	850	1000	600	650	800	550	700	750	950	1100	1600	2200
Cloud base (m)	700	500	500	700	400	450	450	400	400	400	400	350	400	450	450	450	450	750	450

	—	7:54	—	—	7:54	—	—	7:54	—	—	7:52	—	—	7:52	—	—	7:52	—	—
	—	—	4:29	—	—	4:30	—	—	4:31	—	—	4:32	—	—	4:34	—	—	4:35	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Tue morning. Freeze-thaw conditions (max 3°C on Sat night, min -4°C on Mon morning). Winds increasing (light winds from the SSW on Sun afternoon, near gales from the WSW by Tue afternoon).

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Wed afternoon. Freeze-thaw conditions (max 2°C on Fri afternoon, min -5°C on Tue night). Winds decreasing (gales from the SW on Wed afternoon, moderate 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	8° C	Dry	Calm (0 kph at 16).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Dry and cloudy.	Light winds from the SE (9 kph at 140).	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	0° C	-	Calm (0 kph at 136).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1° C	Moderate rain .	Calm (0 kph at 0).	0 km
SHIP4262 43 km W 15m alt. 3 hours ago			Light winds from the SE (15 kph at 130).	- km
SHIP3700 43 km W 15m alt. 2 hours ago			Light winds from the ESE (12 kph at 120).	- km
SHIP4140 43 km W 15m alt. 3 hours ago			Light winds from the SE (15 kph at 130).	- km
SHIP6045 43 km W 3m alt. 3 hours ago	10° C		Light winds from the SE (15 kph at 130).
SHIP6417 43 km W 15m alt. 3 hours ago			Light winds from the SE (15 kph at 130).	- 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.