– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Thu 17 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Thu 17 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 13°C on Thu 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 night). Wind will be generally light.
	Thu 17		Friday 18			Saturday 19			Sunday 20			Monday 21			Tuesday 22
	PM	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	rain shwrs	rain shwrs	some clouds
Cloud base (m)	9050		9500		9300	9000	8550					8250		6900	1800	900
km/h	NW	ESE	W	WNW	E	NW	NW	E	WNW	WNW	SE	W	WNW	SSE	W	W	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	0.1	—
max °C	22	17	18	20	15	18	20	16	19	21	16	16	18	14	13	16	12
min °C	22	13	13	19	13	13	20	14	15	21	12	12	18	11	11	14	10
chill °C	22	13	13	19	13	13	20	14	15	21	12	12	18	11	11	14	10

Freezing level m	3850	3850	3800	3800	3900	3950	3950	4000	3950	3950	3900	3600	3600	3700	3400	3100	2850

	—	—	6:47	—	—	6:48	—	—	6:50	—	—	6:50	—	—	6:52	—	—
	7:15	—	—	7:13	—	—	7:10	—	—	7:08	—	—	7:07	—	—	7:05	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Thu afternoon, min 13°C on Thu 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 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. 48 minutes ago	16°C	Dry	Calm (0 kph at 40).
Black Diamond 32 km SSW 192m alt. 1 hour ago	24°C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	20°C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	21°C	Dry	Calm (0 kph at 209).
Monroe 44 km NW 80m alt. 2 hours ago	9°C	Dry	Calm (0 kph at 273).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	21°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	22°C	Clear	Light winds from the E (6 kph at 90).	16 km
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 1 hour ago	10°C	Dry	Calm (0 kph at 159).
Seattle 49 km WSW 100m alt. 2 hours ago	26°C	-

* 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.