– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Tue 14 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Tue 14 Apr 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 Wed night. Freeze-thaw conditions (max 1°C on Fri afternoon, min -5°C on Tue night). Winds decreasing (near gales from the SW on Tue night, calm by Fri morning).										Days 5–7 Weather Summary Mostly dry. Freeze-thaw conditions (max 15°C on Mon afternoon, min 0°C on Fri night). Wind will be generally light.
		Wednesday 15			Thursday 16			Friday 17			Saturday 18			Sunday 19			Monday 20
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy snow	light snow	mod. snow	mod. snow	some clouds	some clouds	light snow	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	clear	clear	some clouds	clear	rain shwrs
km/h	WSW	WNW	WSW	NW	W	WSW	SW	N	ENE	SE	SE	SE	ESE	ESE	ESE	N	E	ENE	SSW
See all weather maps
cm	11	2	7	8	—	—	2	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.6
max °C	-1	-5	-3	-4	-4	0	-1	-2	1	3	6	8	9	11	13	12	13	15	15
min °C	-5	-5	-4	-5	-5	-1	-3	-3	-1	0	4	6	8	10	12	10	12	14	10
chill °C	-10	-10	-10	-10	-9	-5	-7	-3	-1	0	2	4	6	8	10	9	12	14	10

Freezing level m	900	650	750	550	850	1300	750	1000	1350	2000	2250	2500	2800	3000	3050	3000	3150	3300	3200
Cloud base (m)	400	500	400	450	450	1550	450	500	700	6100	5650	5350	6550	5950	5750		5400	6300	4950

	—	6:18	—	—	6:16	—	—	6:15	—	—	6:13	—	—	6:11	—	—	6:09	—	—
	—	—	7:55	—	—	7:57	—	—	7:58	—	—	—	8:00	—	—	8:00	—	—	8:02

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Wed night. Freeze-thaw conditions (max 1°C on Fri afternoon, min -5°C on Tue night). Winds decreasing (near gales from the SW on Tue night, calm by Fri morning).

Mount Si Weather (Days 3-6):

Mostly dry. Freeze-thaw conditions (max 15°C on Mon afternoon, min 0°C on Fri night). 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	4° C	Dry	Calm (0 kph at 310).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	1° C	-	Calm (3 kph at 247).
Renton 30 km WSW 160m alt. 3 hours ago	6° C	Dry	Wind obs. (6 kph from 240 degs) was rejected.
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	2° C	-	Light winds from the WSW (6 kph at 256).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Light rain .	Light winds from the NW (13 kph at 320).	6 km Mid: broken High: overcast
Grotto wx 39 km NE 1101m alt. 55 minutes ago	-1° C	-	Calm (0 kph at 11).
Auburn 39 km SW 119m alt. 1 hour ago	2° C	-	Calm (0 kph at 80).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1° C	Moderate snow.	Calm (0 kph at 0).	1 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	3° C	Dry	Calm (0 kph at 284).

* 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.