– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 am Thu 17 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 am Thu 17 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 16°C on Thu morning, min 11°C on Thu night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 5mm), mostly falling on Tue morning. Very mild (max 15°C on Sun morning, min 4°C on Tue morning). Winds increasing (calm on Sun morning, fresh winds from the WSW by Mon night).
	Thursday 17			Friday 18			Saturday 19			Sunday 20			Monday 21			Tuesday 22
	AM	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	some clouds	some clouds	rain shwrs	light rain	rain shwrs	rain shwrs
Cloud base (m)	8650	8900				9450	9200	8750				9450	6100	1800	700	550	800	7750
km/h	NNW	WNW	WNW	WSW	WNW	NNW	NW	NNW	N	SW	WNW	WNW	SW	WSW	SW	SW	NW	NNE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1.6	2	1.2	0.1
max °C	16	16	14	12	13	12	13	15	14	15	15	14	11	11	9	5	7	6
min °C	15	16	11	11	12	11	12	14	14	14	15	11	10	11	6	4	6	6
chill °C	15	16	11	11	12	11	12	14	14	14	15	11	9	10	1	0	3	6

Freezing level m	3900	3900	3850	3800	3850	3950	3950	3950	4050	4050	4000	3900	3550	3400	2400	1950	2200	3000

	6:46	—	—	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. Very mild (max 16°C on Thu morning, min 11°C on Thu 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 Sun morning, min 4°C on Tue morning). Winds increasing (calm on Sun morning, fresh winds from the WSW by Mon night).

This table gives the weather forecast for Mount Si at the specific elevation of 1270 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. 51 minutes ago	11°C	Dry	Calm (0 kph at 1).
Renton Airport 36 km WSW 218m alt. 3 hours ago	13°C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	16°C	Dry	Calm (0 kph at 191).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	9°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 2 hours ago	22°C	Dry	Calm (0 kph at 331).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	14°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	14°C	Clear	Light winds from the NE (11 kph at 50).	16 km
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 48 minutes ago	6°C	Dry	Calm (0 kph at 223).
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.