– 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 12°C on Thu morning, min 3°C on Fri morning). Winds increasing (calm on Wed night, gales from the SSW by Fri morning).										Days 5–7 Weather Summary Light rain (total 3mm), mostly falling on Fri night. Mild temperatures (max 9°C on Sun afternoon, min 2°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	SW	WSW	W	SSE	SE	SE	SE	SSW	WSW	SW	W	N	E	ESE	NW	NW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	3	8	19	3	0.4	—	—	—	—	—
max °C	8	8	9	10	12	12	10	8	4	3	4	6	7	8	9	8
min °C	7	8	9	7	11	11	8	3	3	2	2	6	6	7	9	6
chill °C	6	6	9	6	10	11	6	-5	-4	-4	-1	4	5	5	9	5

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 12°C on Thu morning, min 3°C on Fri morning). Winds increasing (calm on Wed night, gales from the SSW by Fri morning).

Mount Si Weather (Days 3-6):

Light rain (total 3mm), mostly falling on Fri night. Mild temperatures (max 9°C on Sun afternoon, min 2°C on Fri night). Wind will be generally light.

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
Renton 30 km WSW 160m alt. 1 hour ago	11°C	Dry	Calm (0 kph at 88).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (5 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Clear	Light winds from the N (7 kph at 1).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	15°C	Dry	Calm (0 kph at 49).
Monroe 44 km NW 80m alt. 2 hours ago		-	Calm (0 kph at 162).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Wind obs. (11 kph from 140 degs) was rejected.	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	12°C	Dry and partly cloudy.	Light winds from the S (11 kph at 170).	16 km Low: few Mid: broken High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	12°C	Dry	Calm (0 kph at 55).
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.