– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Wed 30 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Wed 30 Sep 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 14°C on Sat morning, min 8°C on Wed afternoon). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 17°C on Sat afternoon, min 11°C on Mon afternoon). Wind will be generally light.
	Wed 30		Thursday 1			Friday 2			Saturday 3			Sunday 4			Monday 5
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	some clouds	some clouds	clear	some clouds	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	5100	3250	2400	6900		1650	2550	8500	6800			9450			6900	8450	9650
km/h	NNE	SSW	SSW	SSW	SW	SW	WSW	ENE	ESE	ESE	ESE	SE	SW	WNW	N	NW	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	9	11	11	12	11	10	11	11	14	17	15	17	17	15	13	12	11
min °C	8	9	11	12	9	9	11	11	13	16	15	15	17	12	12	11	11
chill °C	8	9	10	11	7	7	10	10	11	16	15	15	17	11	11	10	10

Freezing level m	3250	3350	3500	3500	3350	3150	3150	4050	4050	4050	4200	4150	4100	4050	3700	3650	4150

	—	—	7:05	—	—	7:05	—	—	7:07	—	—	7:09	—	—	7:09	—	—
	6:49	—	—	6:46	—	—	6:45	—	—	6:43	—	—	6:40	—	—	6:38	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 14°C on Sat morning, min 8°C on Wed afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 17°C on Sat afternoon, min 11°C on Mon afternoon). 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	12°C	Dry	Calm (2 kph at 55).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14°C	Clear	Light winds from the NNW (13 kph at 330).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	14°C	Dry	Calm (0 kph at 198).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 2 hours ago	17°C	Dry	Calm (0 kph at 77).
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 NNW (7 kph at 330).	16 km Low: few Mid: few High: scattered
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	10°C	Dry	Calm (0 kph at 162).
Seattle 49 km WSW 100m alt. 1 hour 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.