– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Thu 01 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Thu 01 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 18°C on Sun afternoon, min 10°C on Fri morning). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Very mild (max 16°C on Sun night, min 8°C on Mon night). Wind will be generally light.
		Friday 2			Saturday 3			Sunday 4			Monday 5			Tuesday 6
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	some clouds	some clouds	clear
Cloud base (m)		1550	800		6250	9350		9550		9550	6850	6800	950	500	750	8900
km/h	SW	WSW	W	NE	ESE	ESE	ESE	SE	SW	WSW	W	W	WSW	N	WSW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	12	10	10	12	15	17	16	17	18	16	13	12	10	9	10	10
min °C	11	10	10	10	13	16	15	15	18	13	12	12	8	8	9	9
chill °C	10	8	8	10	12	16	15	15	18	13	12	12	8	8	9	8

Freezing level m	3400	3300	3600	4100	4200	4200	4250	4100	4200	4100	3850	3650	3850	3750	3850	3750

	—	7:05	—	—	7:07	—	—	7:09	—	—	7:09	—	—	7:11	—	—
	—	—	6:45	—	—	6:43	—	—	6:40	—	—	6:38	—	—	6:37	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 18°C on Sun afternoon, min 10°C on Fri morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 16°C on Sun night, min 8°C on Mon 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. 38 minutes ago	13°C	Dry	Calm (0 kph at 61).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16°C	Clear	Light winds from the NNW (6 kph at 340).	16 km
Auburn 39 km SW 119m alt. 40 minutes ago	16°C	Dry	Calm (0 kph at 68).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	11°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 1 hour ago	13°C	Dry	Calm (0 kph at 233).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	15°C	Dry and partly cloudy.	Light winds from the NW (7 kph at 310).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	14°C	Dry and partly cloudy.	Light winds from the N (7 kph at 0).	16 km Low: broken
BUOY-EBSW1 46 km W 3m alt. 58 minutes ago
Snohomish 49 km NW 196m alt. 1 hour ago	13°C	Dry	Calm (3 kph at 74).
Seattle 49 km WSW 100m alt. 31 minutes 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.