– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Tue 15 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Tue 15 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 22°C on Thu afternoon, min 11°C on Tue night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 21°C on Sun afternoon, min 11°C on Sun night). Wind will be generally light.
		Wednesday 16			Thursday 17			Friday 18			Saturday 19			Sunday 20
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds
Cloud base (m)					8900					9250	9050	8600			9350	6700
km/h	E	N	NNW	E	NW	NW	SE	W	W	ESE	NW	NW	ESE	WNW	NW	SSE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	12	18	21	16	20	22	17	17	19	15	17	20	16	19	21	15
min °C	11	13	21	14	16	22	13	13	19	12	13	20	14	15	20	11
chill °C	11	13	21	14	16	22	13	13	19	12	13	20	14	15	20	11

Freezing level m	3050	3550	3700	3900	3850	3900	3850	3850	3850	4000	4000	4000	4100	4050	3950	3700

	—	6:45	—	—	6:46	—	—	6:47	—	—	6:48	—	—	6:50	—	—
	—	—	7:16	—	—	7:15	—	—	7:13	—	—	7:10	—	—	7:08	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Thu afternoon, min 11°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Sun afternoon, min 11°C on Sun 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. 2 hours ago	14°C	Dry	Calm (0 kph at 1).
Renton Airport 36 km WSW 218m alt. 3 hours ago	17°C	-	Calm (0 kph at 0).	16 km Low: few
Auburn 39 km SW 119m alt. 1 hour ago	21°C	Dry	Calm (0 kph at 80).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	8°C	Fog -.	Calm (0 kph at 0).	1 km Low: overcast
Monroe 44 km NW 80m alt. 2 hours ago	18°C	Dry	Calm (0 kph at 263).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	17°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	16°C	-	Light winds from the N (9 kph at 350).	16 km Low: few
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 1 hour ago	11°C	Dry	Calm (0 kph at 128).
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.