– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Tue 10 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Tue 10 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A heavy fall of snow, heaviest during Thu night. Becoming milder with heavy rain (total 45mm) on Thu night. Freeze-thaw conditions (max 7°C on Wed night, min -1°C on Tue morning). Mainly strong winds.									Days 4–6 Weather Summary A light fall of snow, heaviest on Fri morning. Turning milder with light rain (total 2mm) on Sun night. Freeze-thaw conditions (max 4°C on Sun night, min -5°C on Sat night). Wind will be generally light.
	Tuesday 10			Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light rain	light snow	light snow	heavy rain	heavy rain	light snow	mod. snow	heavy snow	mod. snow	cloudy	light snow	snow shwrs	clear	some clouds	cloudy	light rain	rain shwrs
km/h	SW	SW	SW	S	SW	SW	SW	SW	SW	NW	NW	WSW	W	NNW	E	SSE	S	SSW
See all weather maps
cm	1	—	4	4	—	—	1	8	15	9	—	5	1	—	—	—	—	—
mm	—	0.6	—	—	11	16	1.6	—	16	—	—	—	—	—	—	—	0.9	1.5
max °C	0	2	2	2	6	7	2	2	3	1	0	0	-1	1	-2	3	3	4
min °C	-1	1	1	1	3	2	2	1	1	0	0	-2	-3	0	-5	-1	3	3
chill °C	-4	-3	-3	1	-1	-4	-3	-2	-1	-2	-2	-2	-3	-2	-7	-3	1	3

Freezing level m	500	600	700	850	1550	900	800	650	1300	600	550	300	400	600	0	1200	1150	2650
Cloud base (m)	450	700	450	400	400	450	450	450	400	450	400	450	450	550	450	2650	550	900

	7:30	—	—	7:28	—	—	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—
	—	7:04	—	—	7:06	—	—	7:07	—	—	7:08	—	—	7:09	—	—	7:12	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Thu night. Becoming milder with heavy rain (total 45mm) on Thu night. Freeze-thaw conditions (max 7°C on Wed night, min -1°C on Tue morning). Mainly strong winds.

Mount Si Weather (Days 3-6):

A light fall of snow, heaviest on Fri morning. Turning milder with light rain (total 2mm) on Sun night. Freeze-thaw conditions (max 4°C on Sun night, min -5°C on Sat night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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	-1° C	-	Calm (0 kph at 350).
Snoqualmie Pass 30 km ESE 824m alt. 34 minutes ago	-2° C	-	Calm (0 kph at 191).
Black Diamond 32 km SSW 192m alt. 2 hours ago	12° C	Dry	Calm (0 kph at 157).
Grotto wx 35 km NE 321m alt. 56 minutes ago	0° C	-	Calm (0 kph at 273).
Renton Airport 36 km WSW 218m alt. 1 hour ago	3° C	Dry and cloudy.	Light winds from the S (13 kph at 190).	16 km Low: few Mid: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	-5° C	-	Calm (0 kph at 128).
Auburn 39 km SW 119m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 202).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-6° C	Dry and cloudy.	Light winds from the W.(Wind varies from 200 to 320 degs) (15 kph at 260).	16 km Low: scattered Mid: broken High: overcast
SHIP3887 42 km WSW 15m alt. 3 hours ago				- km
SHIP3793 42 km WSW 3m alt. 3 hours ago

* 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.