– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Mon 09 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Mon 09 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A moderate fall of snow heaviest on Wed morning. Turning milder with heavy rain (total 35mm), heaviest during Wed night. Freeze-thaw conditions (max 8°C on Wed night, min -2°C on Mon night). Winds increasing (light winds from the SW on Tue night, strong winds from the SW by Wed night).									Days 4–6 Weather Summary A heavy fall of snow, heaviest during Thu night. Becoming milder with heavy rain (total 49mm) on Thu night. Freeze-thaw conditions (max 3°C on Thu night, min -2°C on Sat night). Wind will be generally light.
	Monday 9			Tuesday 10			Wednesday 11			Thursday 12			Friday 13			Saturday 14
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	light snow	snow shwrs	light snow	light snow	light snow	mod. rain	heavy rain	light rain	mod. snow	mod. snow	light snow	mod. snow	light snow	light snow	some clouds	some clouds
km/h	SW	SW	SW	SW	SW	SW	SSW	SW	WSW	WSW	SW	SW	WSW	WSW	WSW	WNW	NNW	E
See all weather maps
cm	2	2	4	1	1	3	2	—	—	—	6	10	4	8	5	1	—	—
mm	—	—	—	—	0.8	—	7	8	19	3	—	32	13	—	—	—	—	—
max °C	0	2	-1	0	2	1	2	6	8	2	2	3	2	1	1	0	1	-1
min °C	-1	1	-2	-2	0	1	2	5	3	2	2	1	2	1	0	0	1	-2
chill °C	-5	-5	-7	-6	-5	-3	-1	0	-2	-3	-1	-1	-2	-2	-2	-2	-1	-2

Freezing level m	500	600	300	500	550	700	1000	1550	1100	850	800	1700	1000	750	500	450	650	0
Cloud base (m)	400	450	400	450	750	450	400	400	450	500	400	400	400	400	400	450	450	450

	7:31	—	—	7:30	—	—	7:28	—	—	7:26	—	—	7:24	—	—	7:22	—	—
	—	7:02	—	—	7:04	—	—	7:06	—	—	7:07	—	—	7:08	—	—	7:09	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow heaviest on Wed morning. Turning milder with heavy rain (total 35mm), heaviest during Wed night. Freeze-thaw conditions (max 8°C on Wed night, min -2°C on Mon night). Winds increasing (light winds from the SW on Tue night, strong winds from the SW by Wed night).

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Thu night. Becoming milder with heavy rain (total 49mm) on Thu night. Freeze-thaw conditions (max 3°C on Thu night, min -2°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. 2 hours ago	4° C	Dry	Calm (0 kph at 10).
Snoqualmie Pass 30 km ESE 824m alt. 35 minutes ago	1° C	-	Calm (0 kph at 88).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 46 minutes ago	2° C	-	Calm (0 kph at 156).
Renton Airport 36 km WSW 218m alt. 2 hours ago	4° C	Dry and cloudy.	Light winds from the S (17 kph at 170).	16 km Low: broken Mid: overcast
Grotto wx 39 km NE 1101m alt. 45 minutes ago	-3° C	-	Calm (0 kph at 207).
Auburn 39 km SW 119m alt. 3 hours ago	7° C	Dry	Calm (0 kph at 101).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-5° C	Light snow.	Light winds from the N (9 kph at 1).	5 km Mid: few High: broken
SHIP3410 42 km WSW 15m alt. 3 hours ago				- km
SHIP7467 42 km WSW 15m alt. 2 hours ago				- 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.