– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Thu 19 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Thu 19 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Freeze-thaw conditions (max 2°C on Sun morning, min -7°C on Thu afternoon). Winds increasing (calm on Thu afternoon, strong winds from the ESE by Sat night).											Days 5–7 Weather Summary Moderate rain (total 19mm), heaviest on Mon afternoon giving way to a moderate fall of snow, heaviest on Mon night. Freeze-thaw conditions (max 4°C on Mon night, min -3°C on Tue afternoon). Winds increasing (light winds from the SE on Sun night, near gales from the SW by Tue afternoon).
	Thu 19		Friday 20			Saturday 21			Sunday 22			Monday 23			Tuesday 24
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	cloudy	some clouds	cloudy	cloudy	cloudy	cloudy	light rain	light snow	light snow	light snow	heavy rain	snow shwrs	snow shwrs	light snow	snow shwrs
km/h	NNW	SW	SW	SW	ESE	ESE	ESE	ESE	SE	SE	SSW	SE	S	SW	SW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	1	2	1	—	3	2	3	3
mm	—	—	—	—	—	—	—	—	0.1	—	—	1.1	11	7	—	—	—
max °C	-6	-7	-5	-4	-2	0	0	1	2	1	1	3	3	4	-2	-2	-3
min °C	-7	-7	-6	-4	-3	-1	-1	0	1	0	-1	1	3	-1	-2	-3	-3
chill °C	-7	-10	-11	-9	-7	-8	-8	-8	-6	-6	-5	-4	-2	-9	-11	-13	-12

Freezing level m	450	0	600	700	650	1050	1250	1350	1400	1300	1250	1450	1950	1850	1050	1000	850
Cloud base (m)	400	1400	400	550	1850	2500	2050	2500	2000	1500	450	750	400	400	600	500	550

	—	—	7:03	—	—	7:01	—	—	6:58	—	—	6:58	—	—	6:56	—	—
	5:36	—	—	5:37	—	—	5:39	—	—	5:40	—	—	5:43	—	—	5:44	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 2°C on Sun morning, min -7°C on Thu afternoon). Winds increasing (calm on Thu afternoon, strong winds from the ESE by Sat night).

Mount Si Weather (Days 3-6):

Moderate rain (total 19mm), heaviest on Mon afternoon giving way to a moderate fall of snow, heaviest on Mon night. Freeze-thaw conditions (max 4°C on Mon night, min -3°C on Tue afternoon). Winds increasing (light winds from the SE on Sun night, near 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	-1° C	-	Calm (0 kph at 338).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	4° C	-	Moderate winds from the NW (20 kph at 320).	16 km Low: few
Auburn 39 km SW 119m alt. 1 hour ago	4° C	Dry	Calm (0 kph at 134).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-5° C	-	Wind obs. (7 kph from 1 degs) was rejected.	0.0 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	4° C	Dry and partly cloudy.	Light winds from the NNW (19 kph at 330).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	4° C	Dry and partly cloudy.	Moderate winds from the NNW (24 kph at 340).	16 km Low: few Mid: broken
Snohomish 49 km NW 196m alt. 57 minutes ago	0° C	-	Wind obs. (13 kph from 46 degs) was rejected.
Seattle 49 km WSW 100m alt. 4 hours ago		-	Wind obs. (21 kph from 158 degs) was rejected.
SHIP8096 51 km W 3m alt. 4 hours ago	3° C		Fresh winds from the NNW (37 kph at 340).

* 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.