– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Fri 02 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Fri 02 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 night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Very mild (max 17°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light.
		Saturday 3			Sunday 4			Monday 5			Tuesday 6			Wednesday 7
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	clear	clear	clear	clear	clear	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)		7850				8850	9400		6800		9500	9100
km/h	E	ESE	ESE	SE	SSE	SW	W	WNW	WNW	NNW	N	N	N	NNW	NNW	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	13	15	17	16	17	18	16	13	13	11	12	14	14	16	17	15
min °C	10	13	16	16	16	18	12	12	12	10	10	13	13	15	16	15
chill °C	10	12	16	16	16	18	12	12	12	10	8	12	12	14	15	14

Freezing level m	4150	4200	4150	4250	4200	4200	4050	3900	3850	4050	4050	4200	4250	4150	4050	4100

	—	7:07	—	—	7:09	—	—	7:09	—	—	7:11	—	—	7:13	—	—
	—	—	6:43	—	—	6:40	—	—	6:38	—	—	6:37	—	—	6:35	—

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 night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 17°C on Wed 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 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
Black Diamond 32 km SSW 192m alt. 53 minutes ago		-	Wind obs. (8 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	17°C	Clear	Light winds from the NW (9 kph at 320).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	13°C	Dry	Calm (0 kph at 204).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	9°C	Mist -.	Calm (0 kph at 0).	1 km
Monroe 44 km NW 80m alt. 2 hours ago	11°C	Dry	Calm (0 kph at 70).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	17°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	16°C	Dry and partly cloudy.	Light winds from the N (11 kph at 350).	16 km Low: few Mid: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 1 hour ago	13°C	Dry	Calm (0 kph at 9).
Seattle 49 km WSW 100m alt. 47 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.