– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Sat 03 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Sat 03 Oct 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 Sun afternoon, min 12°C on Mon night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Warm (max 21°C on Thu afternoon, min 12°C on Tue night). Wind will be generally light.
	Sat 3		Sunday 4			Monday 5			Tuesday 6			Wednesday 7			Thursday 8
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	9100						950								9200	8800	9600
km/h	NNE	ESE	W	W	SSE	NW	NW	NNE	NW	NNW	NNE	NNW	NNW	NNE	NNW	NW	SSE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	21	17	21	22	17	17	18	14	16	18	13	18	20	15	18	21	16
min °C	21	15	16	22	13	13	18	12	12	18	12	13	19	14	14	20	14
chill °C	21	15	16	22	13	13	18	12	12	18	12	13	19	14	14	20	14

Freezing level m	4100	4200	4150	4150	4000	3800	4000	4200	4150	4100	4100	4000	4000	4150	4100	4100	4000

	—	—	7:09	—	—	7:09	—	—	7:11	—	—	7:13	—	—	7:15	—	—
	6:43	—	—	6:40	—	—	6:38	—	—	6:37	—	—	6:35	—	—	6:32	—

Mount Si Weather (Days 0-3):

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

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Thu afternoon, min 12°C on Tue 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
Black Diamond 32 km SSW 192m alt. 32 minutes ago		-	Wind obs. (6 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	19°C	Clear	Light winds from the NW (15 kph at 320).	16 km
SHIP6953 43 km W 15m alt. 4 hours ago				- km
Monroe 44 km NW 80m alt. 52 minutes ago	17°C	Dry	Calm (0 kph at 97).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	19°C	Clear	Light winds from the WNW (9 kph at 300).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	19°C	Clear	Light winds from the N (9 kph at 10).	16 km
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 27 minutes ago	17°C	Dry	Calm (2 kph at 209).
Seattle 49 km WSW 100m alt. 57 minutes ago		-
SHIP8626 54 km W 15m alt. 3 hours ago				- km

* 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.