– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Fri 20 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Fri 20 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 24mm), heaviest during Fri morning. Freeze-thaw conditions (max 6°C on Fri morning, min -4°C on Sat morning). Winds decreasing (near gales from the SW on Fri morning, calm by Sun night).									Days 4–6 Weather Summary A heavy fall of snow, heaviest during Tue morning. Becoming milder with light rain (total 4mm) on Tue afternoon. Freeze-thaw conditions (max 3°C on Mon morning, min -6°C on Wed night). Winds increasing (calm on Mon afternoon, gales from the SW by Tue afternoon).
	Friday 20			Saturday 21			Sunday 22			Monday 23			Tuesday 24			Wednesday 25
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	mod. rain	some clouds	some clouds	some clouds	some clouds	clear	clear	some clouds	some clouds	some clouds	light snow	mod. snow	light rain	light snow	snow shwrs	light snow	snow shwrs
km/h	WSW	SW	SW	NW	WNW	SW	SW	WSW	SW	SW	SSW	SW	SSW	SW	SW	WSW	WSW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	1	8	—	5	2	4	4
mm	16	8	—	—	—	—	—	—	—	—	—	0.1	—	4	—	—	—	—
max °C	6	5	2	-4	-3	-3	-1	1	2	3	3	2	1	3	0	-4	-3	-4
min °C	5	4	-2	-4	-3	-3	-2	0	0	1	2	-1	0	3	-5	-4	-3	-6
chill °C	-1	-2	-6	-8	-6	-5	-6	-2	-2	1	2	-7	-6	-5	-16	-15	-12	-13

Freezing level m	2300	1900	1100	750	900	600	1100	1350	1750	1850	1600	1550	1500	1750	550	750	800	0
Cloud base (m)	450	400	600	450	550	700	600	850		500	700	2350	400	450	400	500	500	450

	7:09	—	—	7:07	—	—	7:05	—	—	7:03	—	—	7:01	—	—	7:00	—	—
	—	7:19	—	—	7:20	—	—	7:22	—	—	7:22	—	—	7:23	—	—	7:25	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 24mm), heaviest during Fri morning. Freeze-thaw conditions (max 6°C on Fri morning, min -4°C on Sat morning). Winds decreasing (near gales from the SW on Fri morning, calm by Sun night).

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Tue morning. Becoming milder with light rain (total 4mm) on Tue afternoon. Freeze-thaw conditions (max 3°C on Mon morning, min -6°C on Wed night). Winds increasing (calm on Mon afternoon, gales from the SW by Tue 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	12° C	Dry	Calm (0 kph at 334).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	6° C	-	Calm (0 kph at 135).
Grotto wx 35 km NE 321m alt. 2 hours ago	8° C	Light rain.	Calm (5 kph at 13).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Light rain .	Light winds from the S (15 kph at 180).	14 km Low: broken Mid: overcast
Grotto wx 39 km NE 1101m alt. 53 minutes ago	5° C	Dry	Calm (2 kph at 247).
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (0 kph at 111).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	5° C	Light rain .	Light winds from the W (15 kph at 270).	2 km Mid: scattered High: broken
Woodinville 43 km WNW 137.2m alt. 1 hour ago	13° C	Dry	Wind obs. (16 kph from 288 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13° C	Light rain .	Moderate winds from the S (22 kph at 170).	14 km Low: broken Mid: broken High: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 59 minutes ago	12° C	-	Light winds from the SSW (17 kph at 210).	0.0 km

* 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.