– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Mon 14 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Mon 14 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 10°C on Mon night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 21°C on Sun afternoon, min 12°C on Thu night). Wind will be generally light.
		Tuesday 15			Wednesday 16			Thursday 17			Friday 18			Saturday 19
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light rain	rain shwrs	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	6250	500	650											8700	8500
km/h	E	NNE	N	E	N	NNW	E	NW	WNW	SE	W	W	ENE	NW	NW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	0.4	0.1	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	12	11	14	12	18	21	16	20	22	17	16	18	14	17	20	16
min °C	10	10	12	11	12	21	14	15	21	12	12	18	12	13	20	14
chill °C	10	10	12	11	12	21	14	15	21	12	12	18	12	13	20	14

Freezing level m	3150	2500	2650	3150	3450	3700	3850	3750	3750	3750	3800	3850	4000	4000	4000	4100

	—	6:43	—	—	6:45	—	—	6:46	—	—	6:47	—	—	6:48	—	—
	—	—	7:19	—	—	7:16	—	—	7:15	—	—	7:13	—	—	7:10	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Thu afternoon, min 10°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Sun afternoon, min 12°C on Thu 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. 2 hours ago	13°C	Dry	Calm (0 kph at 36).
Black Diamond 32 km SSW 192m alt. 47 minutes ago		-	Calm (0 kph at 154).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Auburn 39 km SW 119m alt. 45 minutes ago		-	Calm (0 kph at 152).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7°C	Fog -.	Calm (0 kph at 0).	0 km
Monroe 44 km NW 80m alt. 55 minutes ago	11°C	Dry	Calm (0 kph at 351).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	16°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	15°C	Dry and partly cloudy.	Light winds from the N (7 kph at 350).	16 km Low: few Mid: scattered High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	13°C	Dry	Calm (0 kph at 158).

* 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.