– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Thu 22 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Thu 22 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 12°C on Thu morning, min 4°C on Thu night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 17°C on Mon afternoon, min 8°C on Tue night). Wind will be generally light.
	Thursday 22			Friday 23			Saturday 24			Sunday 25			Monday 26			Tuesday 27
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	cloudy	some clouds	light rain	rain shwrs	clear	clear	some clouds	cloudy	cloudy	cloudy	some clouds	some clouds	some clouds	cloudy	some clouds	some clouds	light rain
Cloud base (m)	5450	700	8600	500	550	6750	6050	5450	6400	6050	5550	6000	6300	6150	2950	2550	2100	1600
km/h	NW	NW	NNW	W	NW	E	WSW	W	ESE	ESE	E	ESE	ESE	E	ESE	S	NW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	0.2	0.2	—	—	—	—	—	—	—	—	—	—	—	—	0.8
max °C	12	12	8	5	8	5	10	12	9	12	15	11	15	17	12	13	12	10
min °C	10	10	4	5	6	5	6	11	9	9	13	9	9	15	12	11	11	8
chill °C	10	8	2	3	6	5	6	11	9	8	13	8	8	15	12	10	11	8

Freezing level m	2950	2200	1750	1300	2200	2500	2700	2800	2850	2800	2800	2900	2850	2850	2550	2400	2300	1900

	7:35	—	—	7:35	—	—	7:37	—	—	7:39	—	—	7:41	—	—	7:41	—	—
	—	6:06	—	—	6:05	—	—	6:02	—	—	6:00	—	—	5:59	—	—	5:58	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 12°C on Thu morning, min 4°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 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
Renton 30 km WSW 160m alt. 3 hours ago	9°C	Dry	Calm (0 kph at 243).
Black Diamond 32 km SSW 192m alt. 43 minutes ago		-	Wind obs. (11 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	9°C	Clear	Light winds from the SSE (7 kph at 150).	16 km
Auburn 39 km SW 119m alt. 54 minutes ago		-	Calm (5 kph at 219).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7°C	Clear	Wind obs. (9 kph from 220 degs) was rejected.	16 km
Monroe 44 km NW 80m alt. 59 minutes ago	10°C	Dry	Calm (0 kph at 143).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	11°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 (9 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. 25 minutes ago	11°C	Dry	Calm (2 kph at 215).

* 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.