– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Thu 18 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Thu 18 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A light covering of new snow mostly falling on Sat night. Freeze-thaw conditions (max 9°C on Sat afternoon, min -3°C on Sun morning). Winds increasing (light winds from the ESE on Thu night, strong winds from the SW by Sat night).										Days 5–7 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 11°C on Tue afternoon, min -1°C on Sun night). Winds increasing (light winds from the NE on Mon morning, strong winds from the ESE by Tue morning).
		Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	snow shwrs	snow shwrs	light snow	some clouds	clear	clear	clear	some clouds	some clouds	cloudy	light snow	cloudy	light rain	cloudy
km/h	E	E	ESE	ESE	SE	SW	WSW	WSW	NNW	N	E	E	ESE	ESE	ESE	SW	WSW	SW	WSW
Wave Height Map See all maps
cm	—	—	—	—	—	1.0	6	1.0	—	—	—	—	—	—	—	1.0	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	—
max°C	5	4	7	5	7	9	0	-2	1	0	2	8	8	9	11	10	1	2	2
min°C	2	2	6	4	6	1	-2	-3	0	-1	1	7	7	7	11	0	0	2	0
chill°C	-3	-2	1	-2	1	-5	-10	-10	-4	-5	-1	6	3	2	8	-6	-5	0	-4

Freezing level (m)	1750	1800	2000	2200	2300	1400	1000	1050	1400	1000	1650	2550	2750	2800	2850	1450	1350	1550	1450
Cloud base (m)			2900	8650		1850	550	500	750	950	750		6150		5800	1500	700	850	750

	—	6:09	—	—	6:07	—	—	6:05	—	—	6:03	—	—	6:01	—	—	6:00	—	—
	—	—	—	8:02	—	—	8:04	—	—	8:05	—	—	8:07	—	—	8:07	—	—	8:09

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Sat night. Freeze-thaw conditions (max 9°C on Sat afternoon, min -3°C on Sun morning). Winds increasing (light winds from the ESE on Thu night, strong winds from the SW by Sat night).

Mount Si Weather (Days 3-6):

A dusting of new snow. Freeze-thaw conditions (max 11°C on Tue afternoon, min -1°C on Sun night). Winds increasing (light winds from the NE on Mon morning, strong winds from the ESE by Tue 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
Snoqualmie Pass 30 km ESE 824m alt. 23 minutes ago	-1° C	-	Calm (3 kph at 18).
Renton Airport 36 km WSW 218m alt. 2 hours ago	9° C	Clear	Light winds from the NNW (11 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 26 minutes ago	-1° C	-	Calm (0 kph at 352).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	1° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 33 minutes ago	-1° C	-	Calm (0 kph at 155).

* 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.