– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Mon 12 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Mon 12 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Some drizzle, heaviest during Wed morning. Very mild (max 12°C on Mon afternoon, min 6°C on Mon morning). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 12mm), heaviest on Sat morning. Warm (max 22°C on Fri afternoon, min 7°C on Sat night). Wind will be generally light.
	Monday 12			Tuesday 13			Wednesday 14			Thursday 15			Friday 16			Saturday 17
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	cloudy	cloudy	light rain	light rain	light rain	rain shwrs	clear	clear	clear	clear	clear	clear	rain shwrs	light rain	rain shwrs
Cloud base (m)	1650		2550	2200	1900	850	550	450		7200		8800		9050		550	550	500
km/h	WNW	NW	E	SW	WSW	SSW	SW	SSE	ESE	ESE	ESE	ESE	SSE	WSW	S	SW	WSW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	0.1	0.6	0.6	0.1	—	—	—	—	—	—	9	1.7	1.6
max °C	10	12	8	10	11	11	12	12	12	17	21	14	20	22	15	12	11	9
min °C	6	11	7	9	11	10	11	12	11	12	20	13	14	20	12	11	11	7
chill °C	6	11	7	9	11	10	11	12	11	12	20	12	14	20	11	9	10	7

Freezing level m	2100	2800	2950	2800	2900	2900	3000	3650	3900	3750	3900	3950	4000	3800	3550	2250	2100	2000

	7:20	—	—	7:22	—	—	7:22	—	—	7:24	—	—	7:26	—	—	7:28	—	—
	—	6:24	—	—	6:22	—	—	6:21	—	—	6:19	—	—	6:16	—	—	6:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Wed morning. Very mild (max 12°C on Mon afternoon, min 6°C on Mon morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 12mm), heaviest on Sat morning. Warm (max 22°C on Fri afternoon, min 7°C on Sat 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
Black Diamond 32 km SSW 192m alt. 54 minutes ago		-	Calm (5 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	6°C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	22°C	Dry	Calm (0 kph at 263).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	4°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 49 minutes ago	12°C	Dry	Calm (0 kph at 38).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	7°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	8°C	-	Light winds from the S (7 kph at 170).	16 km Low: few Mid: few
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Seattle 49 km WSW 100m alt. 1 hour ago		-	Wind obs. (11 kph from 306 degs) was rejected.
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	10°C		Light winds from the SSE (8 kph at 160).

* 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.