– Lat/Long: 47.51° N 121.74° W

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

Issued: 4 pm Tue 10 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 30mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 8°C on Wed night, min 0°C on Thu night). Winds decreasing (strong winds from the WSW on Wed night, light winds from the WSW by Thu night).											Days 5–7 Weather Summary A dusting of snow turning to light rain (total 8mm) on Sun afternoon. Freeze-thaw conditions (max 7°C on Mon morning, min -3°C on Sat morning). Wind will be generally light.
	Tue 10		Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light snow	light snow	mod. rain	heavy rain	light snow	light snow	heavy snow	light snow	light snow	light snow	some clouds	some clouds	some clouds	light rain	mod. rain	light rain
km/h	SW	SW	SSW	SW	SW	WSW	WSW	WSW	W	WSW	NNW	NW	NNW	E	SSW	SSW	SSW
See all weather maps
cm	—	3	2	—	—	1	3	12	5	1	3	—	—	—	—	—	—
mm	0.3	—	6	9	14	—	—	—	—	—	—	—	—	—	0.8	6	0.9
max °C	3	2	2	6	8	1	2	1	1	1	0	0	1	0	2	3	6
min °C	1	1	2	3	2	1	2	0	0	1	-2	-3	0	-3	0	2	4
chill °C	-3	-3	0	-1	-4	-5	-2	-2	-2	-1	-5	-3	-2	-5	-2	-1	2

Freezing level m	650	700	950	1650	800	700	750	600	600	600	300	450	600	0	1000	1600	2650
Cloud base (m)	700	450	400	400	450	450	400	400	400	400	450	500	450	650	1900	450	500

	—	—	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: Heavy rain (total 30mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 8°C on Wed night, min 0°C on Thu night). Winds decreasing (strong winds from the WSW on Wed night, light winds from the WSW by Thu night).

Mount Si Weather (Days 3-6):

A dusting of snow turning to light rain (total 8mm) on Sun afternoon. Freeze-thaw conditions (max 7°C on Mon morning, min -3°C on Sat morning). 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	2° C	-	Calm (0 kph at 154).
Snoqualmie Pass 30 km ESE 824m alt. 41 minutes ago	0° C	-	Calm (0 kph at 186).
Grotto wx 35 km NE 321m alt. 2 hours ago	2° C	-	Calm (0 kph at 263).
Baring wx 35 km NE 220m alt. 1 hour ago	1° C	-	Calm (2 kph at 232).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Dry and partly cloudy.	Light winds from the SSW (15 kph at 200).	16 km Low: broken Mid: broken
Grotto wx 39 km NE 1101m alt. 50 minutes ago	-3° C	-	Calm (0 kph at 209).
Auburn 39 km SW 119m alt. 41 minutes ago	13° C	Dry	Calm (2 kph at 223).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-4° C	Moderate snow.	Calm (0 kph at 0).	1 km
SHIP9155 42 km WSW 15m alt. 3 hours ago				- km
SHIP3258 42 km WSW 15m alt. 3 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.