– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sun 05 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sun 05 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Freeze-thaw conditions (max 13°C on Sun afternoon, min -4°C on Mon night). Winds increasing (light winds from the SSE on Sun night, fresh winds from the SW by Mon night).									Days 4–6 Weather Summary Mostly dry. Freeze-thaw conditions (max 7°C on Thu afternoon, min -1°C on Wed morning). Wind will be generally light.
	Sunday 5			Monday 6			Tuesday 7			Wednesday 8			Thursday 9			Friday 10
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	some clouds	some clouds	clear	rain shwrs	some clouds	some clouds	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	some clouds
km/h	ESE	ESE	SSW	SW	WSW	SW	W	NW	NW	NNW	NNW	SE	ESE	NW	SW	SW	WSW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.5	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	12	13	12	10	9	6	-3	1	0	-1	3	2	5	7	7	6	7	4
min °C	11	13	10	9	9	-4	-4	-1	-1	-1	1	2	3	6	6	6	7	-1
chill °C	10	12	9	7	6	-9	-8	-4	-4	-4	-2	0	2	6	6	5	6	-6

Freezing level m	3100	3100	3000	2750	2600	1100	900	1350	1100	1200	1700	1900	2300	2450	2900	2650	2450	1350
Cloud base (m)	6450	6500	6200	6250	1700	450	450	900	1700	550	750				9200	9250		400

	6:37	—	—	6:35	—	—	6:33	—	—	6:31	—	—	6:30	—	—	6:28	—	—
	—	7:40	—	—	7:43	—	—	7:44	—	—	7:45	—	—	7:46	—	—	7:49	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 13°C on Sun afternoon, min -4°C on Mon night). Winds increasing (light winds from the SSE on Sun night, fresh winds from the SW by Mon night).

Mount Si Weather (Days 3-6):

Mostly dry. Freeze-thaw conditions (max 7°C on Thu afternoon, min -1°C on Wed morning). Wind will be generally light.

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	13° C	Dry	Calm (0 kph at 331).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	6° C	-	Calm (0 kph at 251).
Renton 30 km WSW 160m alt. 1 hour ago	13° C	Dry	Calm (2 kph at 181).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (13 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	15° C	Dry	Light winds from the ESE (6 kph at 106).
Renton Airport 36 km WSW 218m alt. 3 hours ago	9° C	Clear	Moderate winds from the N (22 kph at 350).	16 km
Grotto wx 39 km NE 1101m alt. 54 minutes ago	14° C	Dry	Calm (2 kph at 280).
Auburn 39 km SW 119m alt. 1 hour ago	19° C	Dry	Calm (0 kph at 309).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	5° C	Clear	Wind obs. (6 kph from 1 degs) was rejected.	16 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	9° C	Dry	Calm (0 kph at 278).

* 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.