– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Fri 23 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Fri 23 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Mild temperatures (max 9°C on Sun night, min 1°C on Fri morning). Wind will be generally light.									Days 4–6 Weather Summary A moderate fall of snow, heaviest on Wed afternoon. Freeze-thaw conditions (max 9°C on Mon morning, min 0°C on Tue night). Winds increasing (calm on Mon afternoon, fresh winds from the SW by Tue night).
	Friday 23			Saturday 24			Sunday 25			Monday 26			Tuesday 27			Wednesday 28
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	rain shwrs	some clouds	some clouds	cloudy	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	clear	cloudy	some clouds	some clouds	light snow	snow shwrs	light snow
Cloud base (m)	500	700	5850	5300			6300	5550	5800	5350			500	450	500	650	400	400
km/h	NW	N	NNW	S	S	SE	ESE	ESE	ESE	ENE	NNW	NW	SW	SW	SW	SSE	SSE	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2	8	2
mm	—	0.1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	1	2	4	6	8	8	8	8	9	9	9	6	2	1	1	2	2	1
min °C	1	2	3	5	7	7	6	8	8	8	9	3	2	1	0	0	0	0
chill °C	-4	0	1	5	6	5	4	6	6	7	9	1	-4	-5	-7	-4	-4	-2

Freezing level m	1350	1600	2500	2600	2700	2650	2550	2550	2700	2750	2600	2200	1550	1450	1450	1300	1550	1250

	7:35	—	—	7:37	—	—	7:39	—	—	7:41	—	—	7:41	—	—	7:43	—	—
	—	6:05	—	—	6:02	—	—	6:00	—	—	5:59	—	—	5:58	—	—	5:55	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Mild temperatures (max 9°C on Sun night, min 1°C on Fri morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Wed afternoon. Freeze-thaw conditions (max 9°C on Mon morning, min 0°C on Tue night). Winds increasing (calm on Mon afternoon, fresh winds from the SW by Tue night).

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 Airport 36 km WSW 218m alt. 2 hours ago	10°C	Dry and cloudy.	Light winds from the SE (6 kph at 140).	16 km Low: scattered Mid: overcast
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 249).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3°C	Mist -.	Wind obs. (6 kph from 1 degs) was rejected.	3 km Low: overcast
Monroe 44 km NW 80m alt. 1 hour ago	9°C	Dry	Calm (0 kph at 248).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	12°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	11°C	Dry and partly cloudy.	Light winds from the NNW (9 kph at 330).	16 km Low: few Mid: scattered High: broken
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 48 minutes ago	14°C	Dry	Calm (5 kph at 294).
Seattle 49 km WSW 100m alt. 2 hours ago		-	Wind obs. (8 kph from 127 degs) was rejected.
SHIP7750 50 km WSW 15m alt. 4 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.