– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Wed 07 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Wed 07 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 morning. Warm (max 20°C on Wed afternoon, min 6°C on Fri night). Wind will be generally light.									Days 4–6 Weather Summary Some drizzle, heaviest during Mon night. Very mild (max 14°C on Mon afternoon, min 6°C on Sat morning). Wind will be generally light.
	Wednesday 7			Thursday 8			Friday 9			Saturday 10			Sunday 11			Monday 12
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	clear	clear	rain shwrs	mod. rain	light rain	rain shwrs	rain shwrs	rain shwrs	clear	clear	clear	clear	clear	some clouds	light rain
Cloud base (m)	9600			9100	8950	650	400	450	400	850	900	2450				8750	3250	2700
km/h	NW	NNW	NE	NNW	NW	SSW	WSW	SW	SSW	NNW	NNW	E	NW	NW	ESE	WSW	WNW	S
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	0.2	5	3	3	0.3	0.2	—	—	—	—	—	—	1.1
max °C	18	20	16	18	20	15	12	9	8	7	9	7	10	12	8	12	14	11
min °C	13	20	14	14	19	12	10	9	6	6	9	6	6	12	7	7	14	8
chill °C	13	20	14	14	19	10	8	7	3	6	9	5	6	12	6	6	14	7

Freezing level m	4150	4100	4100	4050	4000	3550	2150	1800	1350	1400	1700	1800	1950	2300	3200	3550	3300	2950

	7:13	—	—	7:15	—	—	7:16	—	—	7:16	—	—	7:18	—	—	7:20	—	—
	—	6:35	—	—	6:32	—	—	6:30	—	—	6:29	—	—	6:27	—	—	6:24	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 12mm), heaviest on Fri morning. Warm (max 20°C on Wed afternoon, min 6°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Mon night. Very mild (max 14°C on Mon afternoon, min 6°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
Black Diamond 32 km SSW 192m alt. 59 minutes ago		-	Light winds from the NW (6 kph at 306).
Renton Airport 36 km WSW 218m alt. 3 hours ago	13°C	Dry and cloudy.	Light winds from the N (7 kph at 0).	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	27°C	Dry	Calm (0 kph at 245).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	16°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 1 hour ago	16°C	Dry	Calm (0 kph at 49).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	15°C	Dry and cloudy.	Light winds from the N (6 kph at 1).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	14°C	Dry and cloudy.	Light winds from the NNE (17 kph at 30).	11 km Low: broken Mid: overcast
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Seattle 49 km WSW 100m alt. 1 hour ago		-	Calm (5 kph at 241).
SHIP3923 54 km W 15m alt. 2 hours ago			Light winds from the WNW (13 kph at 300).	- 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.