– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Wed 04 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Wed 04 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 16°C on Thu morning, min 4°C on Sat morning). Winds increasing (calm on Wed afternoon, fresh winds from the SSW by Sat morning).											Days 5–7 Weather Summary Mild with heavy rain (total 42mm), heaviest during Sat night. Becoming colder with a moderate fall of snow heaviest on Sun night. Freeze-thaw conditions (max 5°C on Sat afternoon, min -3°C on Mon night). Winds decreasing (near gales from the SW on Sat night, calm by Tue morning).
	Wed 4		Thursday 5			Friday 6			Saturday 7			Sunday 8			Monday 9
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	some clouds	clear	clear	some clouds	some clouds	light rain	mod. rain	heavy rain	light rain	light snow	mod. snow	light snow	light snow	snow shwrs
km/h	S	ESE	ESE	SE	SW	SW	SW	SW	SW	SSW	SSW	SW	SW	WSW	SW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	1	6	2	2	4
mm	—	—	—	—	—	—	—	—	0.4	9	30	4	—	—	—	—	—
max °C	13	14	16	14	10	10	9	7	6	5	5	3	1	-1	-1	-1	-2
min °C	12	12	15	11	9	9	7	6	4	5	4	1	0	-1	-1	-1	-3
chill °C	12	12	14	10	7	6	4	2	-2	-1	-3	-4	-4	-6	-8	-8	-8

Freezing level m	3600	3750	3850	3750	3200	2900	2700	2350	2350	2300	2450	1650	1350	1200	1050	1150	900
Cloud base (m)	7900				8850	9200		6850	3600	850	400	450	550	450	450	400	400

	—	—	7:26	—	—	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—
	5:13	—	—	5:14	—	—	5:15	—	—	5:17	—	—	5:19	—	—	5:21	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 16°C on Thu morning, min 4°C on Sat morning). Winds increasing (calm on Wed afternoon, fresh winds from the SSW by Sat morning).

Mount Si Weather (Days 3-6):

Mild with heavy rain (total 42mm), heaviest during Sat night. Becoming colder with a moderate fall of snow heaviest on Sun night. Freeze-thaw conditions (max 5°C on Sat afternoon, min -3°C on Mon night). Winds decreasing (near gales from the SW on Sat night, calm by Tue 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 350).
Black Diamond 32 km SSW 192m alt. 1 hour ago	19° C	Dry	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Clear	Light winds from the N (9 kph at 10).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	3° C	Dry	Calm (0 kph at 318).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	1° C	Light rain .	Wind obs. (6 kph from 1 degs) was rejected.	1 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	12° C	Clear	Light winds from the NW (6 kph at 320).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and partly cloudy.	Light winds from the NNE (15 kph at 20).	16 km Low: few Mid: broken
Snohomish 49 km NW 196m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 34).
SHIP9103 51 km W 3m alt. 3 hours ago	12° C		Calm (4 kph at 290).
SHIP8675 51 km W 3m alt. 3 hours ago	12° C		Calm (4 kph at 290).

* 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.