– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Wed 30 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Wed 30 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 Sat afternoon, min 11°C on Wed night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 23°C on Sun afternoon, min 12°C on Mon night). Wind will be generally light.
		Thursday 1			Friday 2			Saturday 3			Sunday 4			Monday 5
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	cloudy	some clouds	some clouds	some clouds	some clouds	some clouds	clear	clear	clear	clear	clear	some clouds	some clouds	some clouds	clear
Cloud base (m)	3300	2250	1850	1550	1600	2250		8300			8900		7000	6550	6800	9600
km/h	SE	S	WSW	S	SW	WNW	E	ESE	N	ESE	SE	WNW	SE	NW	NW	NNE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	13	15	18	14	17	18	15	20	22	17	21	23	17	18	19	14
min °C	11	13	18	12	13	18	13	14	21	15	16	22	15	15	18	12
chill °C	11	13	18	12	13	18	13	14	21	15	16	22	15	15	18	12

Freezing level m	3400	3550	3450	3450	3250	3200	4000	4050	4100	4200	4200	4100	4200	3950	3800	4050

	—	7:05	—	—	7:05	—	—	7:07	—	—	7:09	—	—	7:09	—	—
	—	—	6:46	—	—	6:45	—	—	6:43	—	—	6:40	—	—	6:38	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Sat afternoon, min 11°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 23°C on Sun afternoon, min 12°C on Mon 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. 1 hour ago	11°C	Dry	Calm (0 kph at 122).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Clear	Light winds from the N (11 kph at 350).	16 km Low: few
Auburn 39 km SW 119m alt. 3 hours ago	13°C	Dry	Calm (0 kph at 198).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 55 minutes ago	18°C	Dry	Calm (0 kph at 246).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	12°C	Clear	Calm (0 kph at 0).	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and cloudy.	Light winds from the NNE (17 kph at 30).	16 km Low: broken Mid: overcast
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	10°C	Dry	Calm (0 kph at 105).
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.