– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Fri 28 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Fri 28 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 5°C on Sun afternoon, min -2°C on Fri night). Winds increasing (calm on Sat night, strong winds from the SSW by Sun night).										Days 5–7 Weather Summary A light covering of new snow mostly falling on Mon night. Freeze-thaw conditions (max 1°C on Tue afternoon, min -4°C on Wed night). Wind will be generally light.
		Saturday 29			Sunday 30			Monday 31			Tuesday 1			Wednesday 2			Thursday 3
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	snow shwrs	some clouds	some clouds	some clouds	some clouds	cloudy	light snow	some clouds	light snow	light snow	some clouds	some clouds	some clouds	cloudy	snow shwrs	snow shwrs	cloudy	some clouds	some clouds
km/h	SW	SW	WSW	ESE	ESE	ESE	SSW	SW	SW	SW	WSW	NNW	NNW	SW	WSW	SW	SW	WSW	NW
See all weather maps
cm	1.0	—	—	—	—	—	1.0	—	1.0	5	—	—	—	—	1.0	1.0	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max°C	0	-1	0	2	3	5	4	0	0	-2	-2	1	0	-2	-1	-1	-3	-1	-1
min°C	-2	-1	-1	0	2	4	-1	-1	-1	-3	-3	0	-2	-2	-2	-4	-4	-2	-2
chill°C	-7	-4	-4	0	-4	-2	-9	-6	-7	-10	-8	-2	-6	-6	-8	-11	-10	-6	-4

Freezing level (m)	1100	1150	1250	1500	1700	1850	1450	1200	1200	900	1050	1350	900	950	1150	800	900	1150	950
Cloud base (m)	750	750	450	650		5500	700	1400	750	400	500	1450	450	400	500	650	550	600	750

	—	6:52	—	—	6:50	—	—	6:48	—	—	6:46	—	—	6:43	—	—	6:41	—	—
	—	—	7:31	—	—	7:32	—	—	7:34	—	—	7:36	—	—	7:37	—	—	7:38	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 5°C on Sun afternoon, min -2°C on Fri night). Winds increasing (calm on Sat night, strong winds from the SSW by Sun night).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Mon night. Freeze-thaw conditions (max 1°C on Tue afternoon, min -4°C on Wed night). Wind will be generally light.

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
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	10° C	Dry	Calm (0 kph at 150).
Black Diamond 32 km SSW 192m alt. 41 minutes ago		-	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Dry and partly cloudy.	Light winds from the SSE (7 kph at 160).	16 km Low: few Mid: scattered High: broken
Auburn 39 km SW 119m alt. 50 minutes ago	14° C	Dry	Calm (0 kph at 112).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	1° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: broken Mid: broken High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	9° C	-	Light winds from the S (15 kph at 170).	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	8° C	Dry and partly cloudy.	Light winds from the SSE (15 kph at 160).	13 km Low: few Mid: scattered High: broken
Seattle 49 km WSW 100m alt. 35 minutes ago		-	Wind obs. (8 kph from 140 degs) was rejected.
BUOY-WPOW1 55 km W 3m alt. 53 minutes ago	9° C		Fresh winds from the S (30 kph at 180).
SHIP4912 55 km SW 15m alt. 53 minutes 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.