– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sun 05 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sun 05 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Some drizzle, heaviest during Sun night. Freeze-thaw conditions (max 13°C on Sun night, min -4°C on Tue morning). Winds decreasing (fresh winds from the SW on Mon night, calm by Wed morning).										Days 5–7 Weather Summary Mostly dry. Freeze-thaw conditions (max 9°C on Fri afternoon, min -1°C on Sat afternoon). Winds increasing (calm on Thu afternoon, fresh winds from the SW by Sat afternoon).
		Monday 6			Tuesday 7			Wednesday 8			Thursday 9			Friday 10			Saturday 11
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	clear	rain shwrs	clear	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	cloudy	cloudy	mod. snow
km/h	SSW	SW	WSW	SW	WNW	NNW	N	NNW	NW	N	ESE	NNW	SE	SSE	W	SSW	SW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	7
mm	0.9	—	0.4	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	13	10	10	6	-3	1	1	2	3	3	5	6	7	8	9	8	3	-1	-1
min °C	10	10	9	-3	-4	0	0	1	3	3	4	6	6	7	8	5	0	-1	-2
chill °C	8	8	6	-9	-10	-3	-2	1	2	1	3	6	6	7	8	3	-6	-8	-9

Freezing level m	3000	2800	2650	1200	900	1400	1150	1550	1900	2000	2150	2350	2700	2800	2900	2550	1250	1150	900
Cloud base (m)	6250	8250	1700	500	500	550	6750		1600							7950	600	450	400

	—	6:35	—	—	6:33	—	—	6:31	—	—	6:30	—	—	6:28	—	—	6:26	—	—
	—	—	7:43	—	—	7:44	—	—	7:45	—	—	7:46	—	—	7:49	—	—	7:50	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Sun night. Freeze-thaw conditions (max 13°C on Sun night, min -4°C on Tue morning). Winds decreasing (fresh winds from the SW on Mon night, calm by Wed morning).

Mount Si Weather (Days 3-6):

Mostly dry. Freeze-thaw conditions (max 9°C on Fri afternoon, min -1°C on Sat afternoon). Winds increasing (calm on Thu afternoon, fresh winds from the SW by Sat 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	6° C	Dry	Calm (0 kph at 338).
Snoqualmie Pass 30 km ESE 824m alt. 25 minutes ago	-1° C	-	Calm (0 kph at 124).
Renton 30 km WSW 160m alt. 1 hour ago	9° C	Dry	Calm (0 kph at 39).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (10 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	9° C	Dry	Calm (5 kph at 63).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Clear	Light winds from the SSE (6 kph at 160).	16 km
Grotto wx 39 km NE 1101m alt. 30 minutes ago	3° C	Dry	Calm (0 kph at 343).
Auburn 39 km SW 119m alt. 21 minutes ago	4° C	Dry	Calm (0 kph at 207).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	9° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 57 minutes ago	1° C	-	Calm (0 kph at 283).

* 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.