– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Sun 21 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Sun 21 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A light covering of new snow mostly falling on Mon night. Becoming milder with light rain (total 9mm) on Wed morning. Freeze-thaw conditions (max 6°C on Tue night, min 0°C on Mon night). Wind will be generally light.										Days 5–7 Weather Summary Moderate rain (total 12mm), heaviest on Thu afternoon. Mild temperatures (max 5°C on Thu morning, min 1°C on Fri night). Wind will be generally light.
		Monday 22			Tuesday 23			Wednesday 24			Thursday 25			Friday 26			Saturday 27
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	some clouds	light snow	snow shwrs	cloudy	cloudy	light rain	light rain	rain shwrs	rain shwrs	cloudy	light rain	light rain	light rain	light rain	rain shwrs	rain shwrs	some clouds	some clouds
km/h	SW	SSE	SSE	SW	SE	E	ESE	SE	SSW	E	ESE	ESE	SW	SW	W	WSW	WSW	WNW	E
See all weather maps
cm	—	—	1	7	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	5	—	—	—	—	—	0.5	3	0.5	0.2	—	3	3	3	1.6	0.6	0.2	—	—
max °C	3	5	4	2	4	3	6	6	4	3	5	4	4	3	3	2	2	2	1
min °C	1	3	2	0	2	3	3	5	3	2	5	3	3	3	3	1	2	1	0
chill °C	-2	0	-1	-2	0	1	0	1	2	0	2	1	0	1	2	1	2	1	0

Freezing level m	900	1000	1300	800	900	1300	1700	2150	1100	1750	1700	1300	1200	1100	1100	800	700	750	1100
Cloud base (m)	400	1550	2000	400	500	1800	2400	1800	700	400	1450	750	600	400	400	450	450	550	550

	—	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:54	—	—
	—	—	4:17	—	—	4:19	—	—	4:20	—	—	4:20	—	—	4:21	—	—	4:22	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Mon night. Becoming milder with light rain (total 9mm) on Wed morning. Freeze-thaw conditions (max 6°C on Tue night, min 0°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 12mm), heaviest on Thu afternoon. Mild temperatures (max 5°C on Thu morning, min 1°C on Fri 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 5 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 344).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	-	Light winds from the S (11 kph at 170).	16 km Low: few Mid: few
Auburn 39 km SW 119m alt. 1 hour ago	1° C	-	Calm (0 kph at 196).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-2° C	Light snow.	Light winds from the N (6 kph at 1).	1 km Mid: scattered High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	7° C	Dry and partly cloudy.	Light winds from the S (13 kph at 170).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	7° C	Dry and partly cloudy.	Light winds from the S (17 kph at 180).	16 km Low: few Mid: scattered High: broken
Snohomish 49 km NW 196m alt. 53 minutes ago	4° C	Dry	Calm (2 kph at 148).
Seattle 49 km WSW 100m alt. 1 hour ago	17° C	-
BUOY-WPOW1 55 km W 3m alt. 41 minutes ago	8° C		Strong winds from the S (41 kph at 190).

* 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.