– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Sun 07 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Sun 07 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 62mm), heaviest during Mon night. Later becoming colder with a dusting of snow on Mon night. Freeze-thaw conditions (max 6°C on Mon afternoon, min 0°C on Mon night). Mainly severe gales.									Days 4–6 Weather Summary Heavy rain (total 82mm), heaviest during Wed morning. Mild temperatures (max 7°C on Thu night, min 2°C on Wed morning). Winds increasing (light winds from the WSW on Wed morning, strong winds from the WSW by Thu morning).
	Sunday 7			Monday 8			Tuesday 9			Wednesday 10			Thursday 11			Friday 12
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	rain shwrs	light snow	heavy rain	mod. rain	light snow	some clouds	light rain	heavy rain	heavy rain	heavy rain	heavy rain	heavy rain	heavy rain	mod. rain	light rain	rain shwrs	light rain
km/h	SSW	WSW	WSW	WSW	WSW	WSW	W	SSW	WSW	W	WSW	SW	WSW	WSW	WSW	WSW	WSW	SW
See all weather maps
cm	—	—	1	—	—	3	—	—	—	—	—	—	—	—	—	—	—	—
mm	8	3	2	11	9	16	—	1.3	11	14	10	19	12	15	7	1.8	1.5	0.5
max°C	4	3	3	5	6	6	1	3	6	3	3	5	6	6	7	6	5	5
min°C	3	2	2	3	6	0	0	2	5	2	2	3	5	5	6	6	4	3
chill°C	-4	-5	-5	-4	-1	-2	0	-1	-1	-2	-4	-2	0	0	1	1	-2	-3

Freezing level (m)	2000	1700	1550	1900	2450	2200	1350	1800	2600	1950	1800	2000	2400	2500	2600	2950	3200	2850
Cloud base (m)	400	450	600	550	400	400	750	2150	400	400	400	400	400	450	450	600	600	800

	7:39	—	—	7:41	—	—	7:41	—	—	7:43	—	—	7:43	—	—	7:45	—	—
	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 62mm), heaviest during Mon night. Later becoming colder with a dusting of snow on Mon night. Freeze-thaw conditions (max 6°C on Mon afternoon, min 0°C on Mon night). Mainly severe gales.

Mount Si Weather (Days 3-6):

Heavy rain (total 82mm), heaviest during Wed morning. Mild temperatures (max 7°C on Thu night, min 2°C on Wed morning). Winds increasing (light winds from the WSW on Wed morning, strong winds from the WSW by Thu morning).

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. 2 hours ago	11° C	Dry	Calm (0 kph at 200).
Black Diamond 32 km SSW 192m alt. 2 hours ago	18° C	Dry	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Dry and cloudy.	Moderate winds from the S (20 kph at 190).	16 km Low: few Mid: broken High: overcast
Auburn 39 km SW 119m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 355).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	3° C	Light rain .	Light winds from the WSW.(Wind varies from 150 to 340 degs) (13 kph at 240).	2 km Mid: broken High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and partly cloudy.	Moderate winds from the S (24 kph at 190).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	12° C	Dry and partly cloudy.	Moderate winds from the SSW (24 kph at 210).	14 km Low: broken Mid: broken
Snohomish 49 km NW 196m alt. 1 hour ago	12° C	Dry	Light winds from the SSW (14 kph at 199).
Seattle 49 km WSW 100m alt. 2 hours ago	13° C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	12° C		Strong winds from the SSW (46 kph at 200).

* 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.