– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Wed 07 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Wed 07 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 8mm), mostly falling on Fri morning. Warm (max 20°C on Wed afternoon, min 6°C on Fri night). Wind will be generally light.											Days 5–7 Weather Summary Light rain (total 5mm), mostly falling on Tue morning. Very mild (max 15°C on Mon afternoon, min 6°C on Sat night). Wind will be generally light.
	Wed 7		Thursday 8			Friday 9			Saturday 10			Sunday 11			Monday 12
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	rain shwrs	light rain	light rain	light rain	rain shwrs	rain shwrs	clear	clear	clear	clear	clear	clear	light rain
Cloud base (m)			9100	8500		450	650	400	500	850	2900			8650	8900		1850
km/h	NNW	NE	NNW	NW	SSW	WSW	SW	SW	NW	N	E	NNW	NNW	ESE	WSW	W	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.1	2	1.1	4	0.6	0.6	—	—	—	—	—	—	0.1
max °C	20	16	19	20	15	12	10	8	7	10	7	10	12	8	13	15	12
min °C	19	15	15	19	12	11	9	6	6	9	6	6	12	7	7	15	10
chill °C	19	15	15	19	10	8	7	3	5	9	5	5	12	6	6	15	10

Freezing level m	4100	4050	4050	4050	3650	2250	1850	1350	1400	1700	1850	1950	2350	3250	3550	3400	3150

	—	—	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: Light rain (total 8mm), mostly falling 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):

Light rain (total 5mm), mostly falling on Tue morning. Very mild (max 15°C on Mon afternoon, min 6°C on Sat 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	21°C	Dry	Calm (0 kph at 13).
Black Diamond 32 km SSW 192m alt. 57 minutes ago		-	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	18°C	Clear	Light winds from the N (6 kph at 0).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	17°C	Dry	Calm (0 kph at 238).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	15°C	Clear	Wind obs. (11 kph from 1 degs) was rejected.	16 km
Monroe 44 km NW 80m alt. 1 hour ago	15°C	Dry	Calm (0 kph at 237).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	18°C	Clear	Wind obs. (7 kph from 310 degs) was rejected.	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	18°C	-	Light winds from the WNW (7 kph at 290).	16 km Low: few Mid: few
BUOY-EBSW1 46 km W 3m alt. 58 minutes ago
Seattle 49 km WSW 100m alt. 1 hour ago		-

* 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.