– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Wed 10 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Wed 10 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 96mm), heaviest during Wed afternoon. Mild temperatures (max 8°C on Wed morning, min 2°C on Thu morning). Winds decreasing (stormy winds from the SW on Wed morning, light winds from the WSW by Thu afternoon).									Days 4–6 Weather Summary Heavy rain (total 60mm), heaviest during Mon morning. Later becoming colder with a dusting of snow on Mon night. Freeze-thaw conditions (max 10°C on Sat morning, min -1°C on Mon night). Winds increasing (light winds from the SSW on Sun morning, severe gales from the SW by Mon afternoon).
	Wednesday 10			Thursday 11			Friday 12			Saturday 13			Sunday 14			Monday 15
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	heavy rain	heavy rain	heavy rain	light rain	light rain	light rain	rain shwrs	rain shwrs	clear	some clouds	rain shwrs	light rain	cloudy	rain shwrs	heavy rain	light rain	light snow
km/h	SW	SW	WSW	SW	WSW	WSW	WSW	WSW	SW	SW	SW	SW	SSW	SW	S	SSW	SW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2
mm	28	25	24	13	2	1.9	0.3	0.4	0.7	—	—	4	1.2	—	12	23	4	16
max°C	8	8	7	3	3	6	6	5	6	10	9	8	5	6	6	6	6	6
min°C	7	8	4	2	3	5	5	5	4	8	8	5	4	6	5	6	6	-1
chill°C	0	2	-1	-3	0	0	0	0	0	4	4	0	0	2	-1	0	-1	-7

Freezing level (m)	2950	3100	2500	1850	2350	2550	3100	3150	3400	3100	2800	2500	2250	2250	2550	2550	2350	1650
Cloud base (m)	400	400	400	450	450	450	450	450	700	9000		2150	500	650	800	400	400	400

	7:43	—	—	7:43	—	—	7:45	—	—	7:46	—	—	7:47	—	—	7:48	—	—
	—	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 96mm), heaviest during Wed afternoon. Mild temperatures (max 8°C on Wed morning, min 2°C on Thu morning). Winds decreasing (stormy winds from the SW on Wed morning, light winds from the WSW by Thu afternoon).

Mount Si Weather (Days 3-6):

Heavy rain (total 60mm), heaviest during Mon morning. Later becoming colder with a dusting of snow on Mon night. Freeze-thaw conditions (max 10°C on Sat morning, min -1°C on Mon night). Winds increasing (light winds from the SSW on Sun morning, severe gales from the SW by Mon 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 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 246).
Black Diamond 32 km SSW 192m alt. 1 hour ago	19° C	Dry	Wind obs. (6 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 1 hour ago	14° C	-	Light winds from the S (17 kph at 190).	0.0 km
Auburn 39 km SW 119m alt. 1 hour ago	12° C	Dry	Calm (2 kph at 44).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	8° C	Moderate rain .	Light winds from the N (9 kph at 1).	1 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14° C	-	Moderate winds from the S (20 kph at 180).	0.0 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13° C	-	Fresh winds from the SSW (30 kph at 200).	0.0 km
Snohomish 49 km NW 196m alt. 2 hours ago	10° C	Light rain.	Calm (2 kph at 161).
Seattle 49 km WSW 100m alt. 54 minutes ago	14° C	-	Wind obs. (6 kph from 161 degs) was rejected.
BUOY-WPOW1 55 km W 3m alt. 42 minutes ago	13° C		Strong winds from the S (42 kph at 180).

* 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.