– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Wed 16 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Wed 16 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 22°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 21°C on Sun afternoon, min 10°C on Tue morning). Wind will be generally light.
		Thursday 17			Friday 18			Saturday 19			Sunday 20			Monday 21
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	rain shwrs
Cloud base (m)		8600	8900				9350	9300						7650	1900	700
km/h	E	WNW	WNW	SE	W	WNW	E	NW	NW	E	WNW	WNW	SE	SW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.5
max °C	16	21	22	17	17	19	15	17	20	16	19	21	16	16	18	14
min °C	15	16	22	13	13	19	12	13	20	13	14	21	12	13	17	11
chill °C	15	16	22	13	13	19	12	13	20	13	14	21	12	13	17	11

Freezing level m	3950	3900	3900	3850	3800	3850	3900	3950	4000	4150	4100	4050	3950	3550	3300	3200

	—	6:46	—	—	6:47	—	—	6:48	—	—	6:50	—	—	6:50	—	—
	—	—	7:15	—	—	7:13	—	—	7:10	—	—	7:08	—	—	7:07	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Sun afternoon, min 10°C on Tue 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. 1 hour ago	13°C	Dry	Calm (0 kph at 49).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	17°C	Clear	Light winds from the N (7 kph at 0).	16 km
Auburn 39 km SW 119m alt. 27 minutes ago	16°C	Dry	Calm (0 kph at 225).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	10°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 1 hour ago	17°C	Dry	Calm (0 kph at 159).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	17°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	17°C	Clear	Light winds from the NNE (13 kph at 20).	16 km
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 28 minutes ago	8°C	Dry	Calm (0 kph at 95).

* 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.