– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Thu 17 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 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 21°C on Sun afternoon, min 13°C on Thu night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Very mild (max 18°C on Mon afternoon, min 10°C on Tue morning). Wind will be generally light.
		Friday 18			Saturday 19			Sunday 20			Monday 21			Tuesday 22
	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	clear	clear	clear
Cloud base (m)				9250	8900	8550							6900	5850		9450
km/h	ESE	W	WNW	E	WNW	NW	ESE	WNW	WNW	SE	W	WNW	NE	NW	NW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	16	18	20	15	18	20	16	19	21	16	16	18	13	14	16	12
min °C	13	13	20	13	14	20	14	14	20	12	12	18	11	10	16	10
chill °C	13	13	20	13	14	20	14	14	20	12	12	18	11	10	16	10

Freezing level m	3850	3800	3800	3900	3900	3950	4050	4000	3950	3850	3700	3700	3700	3550	3350	3300

	—	6:47	—	—	6:48	—	—	6:50	—	—	6:50	—	—	6:52	—	—
	—	—	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 21°C on Sun afternoon, min 13°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 18°C on Mon 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 167).
Black Diamond 32 km SSW 192m alt. 46 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 716m alt. 2 hours ago	13°C	Clear	Light winds from the SSE (7 kph at 150).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	16°C	Dry	Calm (0 kph at 269).
Yarrow Point 39 km W 41.1m alt. 2 hours ago	12°C	Dry	Calm (0 kph at 236).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	10°C	Clear	Light winds from the N (6 kph at 1).	16 km
Madison Park wx 43 km W 18m alt. 2 hours ago	14°C	Dry	Calm (2 kph at 208).
SHIP6001 43 km W 15m alt. 2 hours ago	14°C		Calm (6 kph at 230).	17.7 km
SHIP9442 43 km W 3m alt. 2 hours ago	14°C		Calm (5 kph at 230).	20.4 km
Monroe 44 km NW 80m alt. 56 minutes ago	22°C	Dry	Calm (0 kph at 238).

* 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.