– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Tue 22 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Tue 22 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 30mm), heaviest during Fri afternoon. Very mild (max 16°C on Wed afternoon, min 8°C on Fri morning). Winds increasing (calm on Thu morning, fresh winds from the SSW by Fri morning).										Days 5–7 Weather Summary Light rain (total 3mm), mostly falling on Fri night. Very mild (max 15°C on Sun afternoon, min 7°C on Fri night). Wind will be generally light.
		Wednesday 23			Thursday 24			Friday 25			Saturday 26			Sunday 27
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	clear	some clouds	some clouds	some clouds	rain shwrs	rain shwrs	heavy rain	rain shwrs	rain shwrs	some clouds	cloudy	cloudy	clear	some clouds
Cloud base (m)	2850	2350	2200	5450		2950	650	900	450	700	700	7050	6800	6250	5900	6600
km/h	SSE	WSW	WNW	ESE	SE	WSW	ESE	SSW	WSW	SW	W	NNW	E	NE	NW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	3	8	19	3	0.4	—	—	—	—	—
max °C	12	14	16	12	16	16	12	11	9	8	10	13	9	13	15	10
min °C	9	11	16	10	12	14	11	8	8	7	8	13	8	9	14	7
chill °C	9	11	16	10	12	14	11	4	4	5	8	12	7	8	14	7

Freezing level m	2850	2900	3050	3400	3300	3250	2650	1850	1900	1650	1800	2300	2950	2850	2700	2700

	—	6:54	—	—	6:54	—	—	6:56	—	—	6:58	—	—	6:58	—	—
	—	—	7:02	—	—	7:00	—	—	6:59	—	—	6:57	—	—	6:54	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 30mm), heaviest during Fri afternoon. Very mild (max 16°C on Wed afternoon, min 8°C on Fri morning). Winds increasing (calm on Thu morning, fresh winds from the SSW by Fri morning).

Mount Si Weather (Days 3-6):

Light rain (total 3mm), mostly falling on Fri night. Very mild (max 15°C on Sun afternoon, min 7°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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Renton 30 km WSW 160m alt. 1 hour ago	12°C	Dry	Calm (0 kph at 73).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (6 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 3 hours ago	17°C	Clear	Light winds from the SSW (6 kph at 200).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	15°C	Dry	Calm (0 kph at 49).
Monroe 44 km NW 80m alt. 2 hours ago	4°C	Dry	Calm (0 kph at 17).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	17°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	16°C	-	Light winds from the SSW (7 kph at 200).	16 km Low: few Mid: few High: broken
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 1 hour ago	12°C	Dry	Calm (0 kph at 131).
Seattle 49 km WSW 100m alt. 2 hours ago		-

* 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.