– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Wed 21 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Wed 21 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 19°C on Wed afternoon, min 5°C on Thu night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 17°C on Mon afternoon, min 8°C on Sat night). Wind will be generally light.
	Wed 21		Thursday 22			Friday 23			Saturday 24			Sunday 25			Monday 26
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	clear	some clouds	some clouds	light rain	rain shwrs	clear	clear	some clouds	cloudy	clear	some clouds	some clouds	clear	clear	clear
Cloud base (m)				800	1650	500	550			4650	5800	6050	5800	5600
km/h	W	SE	WNW	NNW	NW	NW	NNW	ENE	NW	NNW	ESE	SSE	WNW	ESE	SE	WNW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	0.1	0.1	—	—	—	—	—	—	—	—	—	—
max °C	19	14	12	12	9	6	8	5	10	12	9	13	15	10	14	17	11
min °C	17	11	10	10	5	5	7	5	6	11	8	8	13	9	8	15	9
chill °C	17	11	10	9	3	3	7	5	6	11	8	8	13	9	7	15	8

Freezing level m	3200	3150	2950	2250	1700	1300	2500	2400	2850	2850	3050	3000	3000	2950	3000	3100	3400

	—	—	7:35	—	—	7:35	—	—	7:37	—	—	7:39	—	—	7:41	—	—
	6:07	—	—	6:06	—	—	6:05	—	—	6:02	—	—	6:00	—	—	5:59	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Wed afternoon, min 5°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 17°C on Mon afternoon, min 8°C on Sat 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. 1 hour ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	17°C	Dry	Calm (0 kph at 311).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	11°C	Clear	Light winds from the ESE (6 kph at 110).	16 km
Monroe 44 km NW 80m alt. 2 hours ago	5°C	Dry	Calm (0 kph at 331).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14°C	Dry and partly cloudy.	Calm (0 kph at 0).	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 (9 kph at 10).	16 km Low: few Mid: scattered High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	8°C	Dry	Calm (0 kph at 225).
Seattle 49 km WSW 100m alt. 54 minutes ago	17°C	-	Calm (0 kph at 21).

* 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.