– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Sun 25 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Sun 25 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mild with light rain (total 7mm) on Mon morning Becoming colder with a light covering of snow, mostly falling on Tue night. Freeze-thaw conditions (max 6°C on Sun afternoon, min 0°C on Tue morning). Winds increasing (calm on Mon morning, strong winds from the WSW by Tue night).											Days 5–7 Weather Summary A dusting of snow on Wed afternoon. Freezing level rising with drizzle on Fri afternoon. Freeze-thaw conditions (max 3°C on Thu afternoon, min 0°C on Wed night). Wind will be generally light.
	Sun 25		Monday 26			Tuesday 27			Wednesday 28			Thursday 29			Friday 30
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	light rain	light rain	light rain	light snow	cloudy	cloudy	light snow	cloudy	light snow	snow shwrs	clear	cloudy	cloudy	some clouds	rain shwrs	rain shwrs
Cloud base (m)	700	1550	450	500	400	600	700	400	500	600	650	1650	1450	750	800	1500	1700
km/h	SE	ESE	SW	WNW	SW	SSW	WSW	SW	SW	SSW	ESE	ESE	ESE	SE	ESE	SE	SE
See all weather maps
cm	—	—	—	—	4	—	—	5	—	2	1	—	—	—	—	—	—
mm	2	0.6	3	1.4	—	—	—	—	—	—	—	—	—	—	—	0.7	0.4
max °C	6	5	3	3	2	0	1	1	0	1	1	2	3	3	3	3	3
min °C	5	3	2	2	1	0	0	0	0	1	0	1	3	2	2	3	2
chill °C	1	2	0	-1	-4	-6	-7	-7	-6	-2	-4	-4	-2	-2	0	3	-1

Freezing level m	2100	1950	1700	1600	1600	1250	1450	1250	1350	1350	1350	1550	1700	1500	1650	1650	1650

	—	—	7:41	—	—	7:41	—	—	7:43	—	—	7:45	—	—	7:47	—	—
	6:00	—	—	5:59	—	—	5:58	—	—	5:55	—	—	5:53	—	—	5:52	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with light rain (total 7mm) on Mon morning Becoming colder with a light covering of snow, mostly falling on Tue night. Freeze-thaw conditions (max 6°C on Sun afternoon, min 0°C on Tue morning). Winds increasing (calm on Mon morning, strong winds from the WSW by Tue night).

Mount Si Weather (Days 3-6):

A dusting of snow on Wed afternoon. Freezing level rising with drizzle on Fri afternoon. Freeze-thaw conditions (max 3°C on Thu afternoon, min 0°C on Wed 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
Renton 30 km WSW 160m alt. 2 hours ago	13°C	Dry	Calm (2 kph at 157).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14°C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: few Mid: overcast
Auburn 39 km SW 119m alt. 32 minutes ago	15°C	Dry	Calm (0 kph at 42).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	1°C	Light rain .	Wind obs. (6 kph from 1 degs) was rejected.	5 km Mid: broken High: overcast
SHIP4765 42 km WSW 15m alt. 3 hours ago				- km
SHIP5562 42 km WSW 15m alt. 3 hours ago				- km
SHIP3912 42 km WSW 3m alt. 3 hours ago
SHIP2180 42 km WSW 15m alt. 3 hours ago				- km
Monroe 44 km NW 80m alt. 1 hour ago	6°C	Dry	Calm (0 kph at 205).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: broken Mid: overcast

* 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.