– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Tue 17 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Tue 17 Feb 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 2°C on Fri afternoon, min -5°C on Thu night). Wind will be generally light.										Days 5–7 Weather Summary Mild with light rain (total 4mm) on Mon morning Becoming colder with a light covering of snow, mostly falling on Mon afternoon. Freeze-thaw conditions (max 7°C on Sun morning, min -1°C on Fri night). Winds decreasing (fresh winds from the ESE on Sat night, calm by Sun night).
		Wednesday 18			Thursday 19			Friday 20			Saturday 21			Sunday 22			Monday 23
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	some clouds	cloudy	cloudy	cloudy	some clouds	some clouds	cloudy	some clouds	cloudy	cloudy	some clouds	some clouds	cloudy	rain shwrs	light rain	light snow	light snow	snow shwrs
km/h	WNW	SW	SW	ENE	W	WNW	SSE	SW	SW	ESE	ESE	ESE	ESE	ESE	ESE	SE	SSE	SW	SW
See all weather maps
cm	3	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1	5	3
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.9	0.9	1.7	—	—
max °C	0	1	1	-1	0	-1	-4	1	2	0	5	5	4	7	7	4	2	1	2
min °C	-1	0	-1	-2	-1	-2	-5	0	-1	-1	3	3	3	6	4	2	2	1	2
chill °C	-4	-2	-1	-4	-1	-2	-5	-2	-3	-4	-1	-2	-2	2	0	-1	1	-3	-1

Freezing level m	500	450	600	250	350	400	0	450	700	0	1100	1250	1700	1750	1700	1600	900	750	800
Cloud base (m)	400	400	450	2250	400	400	1750	400	550	550	400	3200	750	2500	2350	850	500	400	400

	—	7:05	—	—	7:05	—	—	7:03	—	—	7:01	—	—	6:58	—	—	6:58	—	—
	—	—	5:35	—	—	5:36	—	—	5:37	—	—	5:39	—	—	5:40	—	—	5:43	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 2°C on Fri afternoon, min -5°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mild with light rain (total 4mm) on Mon morning Becoming colder with a light covering of snow, mostly falling on Mon afternoon. Freeze-thaw conditions (max 7°C on Sun morning, min -1°C on Fri night). Winds decreasing (fresh winds from the ESE on Sat night, calm by Sun night).

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. 37 minutes ago	-1° C	-	Calm (0 kph at 354).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 123).
Renton Airport 36 km WSW 218m alt. 3 hours ago	2° C	Dry and cloudy.	Light winds from the S (6 kph at 170).	11 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	0° C	-	Calm (3 kph at 166).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-5° C	Mist -.	Calm (0 kph at 0).	3 km Low: broken Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	3° C	Dry and cloudy.	Light winds from the S (7 kph at 170).	13 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	2° C	Dry and cloudy.	Light winds from the S (6 kph at 170).	11 km Low: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	0° C	-	Wind obs. (6 kph from 49 degs) was rejected.
SHIP4314 54 km W 15m alt. 3 hours ago			Calm (6 kph at 170).	- km
SHIP8789 54 km W 15m alt. 3 hours ago			Calm (6 kph at 170).	- 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.