– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Sun 30 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Sun 30 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 8mm), mostly falling on Mon night. Mild temperatures (max 6°C on Sun morning, min 3°C on Sun afternoon). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 46mm), heaviest during Thu night. Mild temperatures (max 9°C on Thu night, min 3°C on Wed afternoon). Winds increasing (calm on Wed morning, fresh winds from the WSW by Fri morning).
	Sunday 30			Monday 1			Tuesday 2			Wednesday 3			Thursday 4			Friday 5
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	cloudy	cloudy	light rain	mod. rain	rain shwrs	rain shwrs	some clouds	cloudy	light rain	light rain	light rain	light rain	heavy rain	mod. rain	mod. rain	light rain
km/h	SSE	NW	N	WNW	WSW	WSW	N	NW	NE	WSW	WNW	WSW	WSW	WSW	SW	WSW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.3	6	1	0.2	—	—	0.3	0.3	0.5	1.9	22	8	9	4
max°C	6	4	4	4	4	4	4	4	4	5	4	5	5	6	9	8	6	5
min°C	4	3	3	4	4	4	4	3	3	4	3	4	5	5	6	6	5	4
chill°C	4	3	3	3	4	2	2	3	3	4	3	4	5	5	4	1	1	-1

Freezing level (m)	1350	1550	1850	1350	1500	1500	1150	1200	1450	1400	1150	1250	1450	1650	2350	1750	1500	1050
Cloud base (m)	7050	5200	2650	2150	850	400	450	450	650	600	950	450	450	400	400	400	400	400

	7:31	—	—	7:33	—	—	7:35	—	—	7:35	—	—	7:37	—	—	7:37	—	—
	—	4:17	—	—	4:16	—	—	4:16	—	—	4:16	—	—	4:15	—	—	4:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 8mm), mostly falling on Mon night. Mild temperatures (max 6°C on Sun morning, min 3°C on Sun afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 46mm), heaviest during Thu night. Mild temperatures (max 9°C on Thu night, min 3°C on Wed afternoon). Winds increasing (calm on Wed morning, fresh winds from the WSW by Fri morning).

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. 21 minutes ago	8° C	Dry	Calm (0 kph at 258).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (8 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Clear	Light winds from the NNW (7 kph at 330).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 192).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-3° C	Clear	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	7° C	-	Calm (0 kph at 0).	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	7° C	Dry and partly cloudy.	Light winds from the NNE (11 kph at 30).	16 km Low: scattered
Snohomish 49 km NW 196m alt. 3 hours ago	6° C	Dry	Calm (5 kph at 89).
Seattle 49 km WSW 100m alt. 1 hour ago	17° C	-	Light winds from the N (8 kph at 5).
BUOY-WPOW1 55 km W 3m alt. 37 minutes ago	7° C		Light winds from the NNE (17 kph at 20).

* 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.