– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Fri 28 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Fri 28 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Freeze-thaw conditions (max 5°C on Fri night, min -1°C on Sat night). Wind will be generally light.										Days 5–7 Weather Summary A dusting of snow turning to light rain (total 5mm) on Thu afternoon. Freeze-thaw conditions (max 4°C on Thu afternoon, min -2°C on Tue night). Winds increasing (light winds from the WNW on Tue night, strong winds from the SW by Thu afternoon).
		Saturday 29			Sunday 30			Monday 1			Tuesday 2			Wednesday 3			Thursday 4
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	some clouds	clear	some clouds	some clouds	some clouds	some clouds	some clouds	light snow	light snow	cloudy	some clouds	some clouds	some clouds	cloudy	light rain	light rain	heavy rain
km/h	SE	SSE	SW	NE	SW	WNW	NNW	N	NW	SW	WNW	NNW	W	W	WSW	WSW	WSW	SW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	2	1	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1.6	3	14
max°C	5	4	1	0	1	1	2	2	2	0	0	-1	-1	-1	-1	1	2	4	6
min°C	4	3	0	-1	1	1	1	2	1	-1	-1	-1	-2	-1	-1	-1	2	3	3
chill°C	4	1	0	-1	1	-1	-2	-1	-2	-6	-5	-4	-5	-4	-3	-4	0	-2	-3

Freezing level (m)	2400	2000	1500	900	1400	1550	2350	3150	2000	1100	1200	1050	950	1050	1050	1250	1900	2650	2400
Cloud base (m)	5300	400	2650	550	6600	6600		2400	1900	850	450	450	600	500	1600	700	450	450	400

	—	7:31	—	—	7:31	—	—	7:33	—	—	7:35	—	—	7:35	—	—	7:37	—	—
	—	—	4:17	—	—	4:17	—	—	4:16	—	—	4:16	—	—	4:16	—	—	4:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 5°C on Fri night, min -1°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

A dusting of snow turning to light rain (total 5mm) on Thu afternoon. Freeze-thaw conditions (max 4°C on Thu afternoon, min -2°C on Tue night). Winds increasing (light winds from the WNW on Tue night, strong winds from the SW by Thu afternoon).

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	4° C	Dry	Calm (0 kph at 329).
Black Diamond 32 km SSW 192m alt. 1 hour ago	10° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	5° C	Clear	Light winds from the SW (6 kph at 230).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	1° C	-	Calm (0 kph at 194).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-2° C	Dry and cloudy.	Calm (0 kph at 0).	0.0 km High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	6° C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	7° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	6° C	Dry	Calm (0 kph at 20).
Seattle 49 km WSW 100m alt. 42 minutes ago	6° C	-
BUOY-WPOW1 55 km W 3m alt. 56 minutes ago	8° C		Calm (4 kph at 30).

* 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.