– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Wed 28 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Wed 28 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 12mm), heaviest on Fri afternoon. Mild temperatures (max 8°C on Thu afternoon, min 3°C on Wed night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 11°C on Mon afternoon, min 3°C on Sat morning). Wind will be generally light.
	Wednesday 28			Thursday 29			Friday 30			Saturday 31			Sunday 1			Monday 2
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light rain	rain shwrs	some clouds	some clouds	clear	rain shwrs	light rain	clear	some clouds	light rain	rain shwrs	rain shwrs	rain shwrs	some clouds	cloudy	cloudy	some clouds
Cloud base (m)	800	450	850	800	2150	1800	800	400	1700	2150	2350	900	650	950		5050	5350	5200
km/h	SSW	SSW	SE	ESE	ESE	ESE	SE	S	ESE	ESE	WNW	SSE	NW	NNW	ESE	ESE	ESE	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	3	3	0.8	—	—	—	0.3	5	—	—	0.1	0.2	0.1	0.1	—	—	—	—
max °C	6	5	4	7	8	4	6	5	5	7	8	5	6	8	5	10	11	8
min °C	5	5	3	3	7	3	3	4	3	3	7	4	5	8	4	6	10	7
chill °C	2	2	1	1	5	0	1	4	1	1	7	4	5	8	3	4	9	6

Freezing level m	1250	1250	1150	1400	1500	1600	1350	1350	1550	1450	1450	1200	1300	1450	3250	3500	3550	3600

	7:43	—	—	7:45	—	—	7:47	—	—	7:48	—	—	6:50	—	—	7:50	—	—
	—	5:55	—	—	5:53	—	—	5:52	—	—	5:51	—	—	4:50	—	—	5:47	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 12mm), heaviest on Fri afternoon. Mild temperatures (max 8°C on Thu afternoon, min 3°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 11°C on Mon afternoon, min 3°C on Sat morning). 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. 2 hours ago	9°C	Dry	Calm (3 kph at 194).
Renton Airport 36 km WSW 218m alt. 3 hours ago	9°C	Dry and cloudy.	Wind obs. (7 kph from 140 degs) was rejected.	16 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 1 hour ago	19°C	Dry	Calm (0 kph at 185).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1°C	Light snow.	Calm (0 kph at 0).	0 km
Monroe 44 km NW 80m alt. 1 hour ago	8°C	Dry	Calm (0 kph at 87).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	8°C	Dry and partly cloudy.	Light winds from the SSE (11 kph at 160).	16 km Low: scattered Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	9°C	Dry and partly cloudy.	Moderate winds from the SSW (24 kph at 200).	16 km Low: scattered Mid: scattered High: broken
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 47 minutes ago	9°C	Dry	Light winds from the SSE (11 kph at 157).
Seattle 49 km WSW 100m alt. 50 minutes ago		-	Calm (5 kph at 261).

* 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.