– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 am Wed 16 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 am Wed 16 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 22°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 20°C on Sat afternoon, min 10°C on Mon night). Wind will be generally light.
	Wednesday 16			Thursday 17			Friday 18			Saturday 19			Sunday 20			Monday 21
	AM	PM	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	clear	some clouds	clear
Cloud base (m)			7200	8800					8850	9150	8600						1600
km/h	N	NNW	E	WNW	WNW	SE	W	W	ESE	NW	NW	E	NW	NW	NNE	NW	NW	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	18	21	16	21	22	17	17	19	15	17	20	16	18	20	15	16	18	12
min °C	13	21	15	16	22	13	13	19	12	13	20	13	14	20	12	12	17	10
chill °C	13	21	15	16	22	13	13	19	12	13	20	13	14	20	12	12	17	10

Freezing level m	3550	3750	3900	3850	3850	3850	3850	3850	3950	4000	4050	4100	4000	4000	3850	3750	3750	4000

	6:45	—	—	6:46	—	—	6:47	—	—	6:48	—	—	6:50	—	—	6:50	—	—
	—	7:16	—	—	7:15	—	—	7:13	—	—	7:10	—	—	7:08	—	—	7:07	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 20°C on Sat afternoon, min 10°C on Mon 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	9°C	Dry	Calm (0 kph at 41).
Renton Airport 36 km WSW 218m alt. 1 hour ago	11°C	Dry and partly cloudy.	Light winds from the SSE (6 kph at 160).	16 km Low: scattered
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 80).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7°C	Clear	Calm (0 kph at 0).	13 km
Monroe 44 km NW 80m alt. 1 hour ago	22°C	Dry	Calm (0 kph at 237).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	12°C	-	Light winds from the NE (9 kph at 50).	16 km Low: few
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	5°C	Dry	Calm (0 kph at 213).
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.