– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Sun 20 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Sun 20 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 22°C on Sun afternoon, min 9°C on Tue night). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 29mm), heaviest during Fri morning. Very mild (max 16°C on Wed afternoon, min 7°C on Fri morning). Wind will be generally light.
	Sunday 20			Monday 21			Tuesday 22			Wednesday 23			Thursday 24			Friday 25
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	some clouds	rain shwrs	rain shwrs	some clouds	some clouds	some clouds	some clouds	some clouds	light rain	heavy rain	rain shwrs	rain shwrs	rain shwrs
Cloud base (m)				9250	7850	750	450	8250		5300	6000	6400	3450	2750	400	450	800	1950
km/h	WNW	WNW	SE	W	WSW	S	WSW	W	S	WSW	WNW	ESE	NW	W	WSW	W	W	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	0.4	0.1	—	—	—	—	—	1	12	12	2	1
max °C	20	22	17	18	19	14	12	15	12	14	16	12	15	14	11	8	12	10
min °C	15	22	15	15	18	11	11	14	9	10	16	11	12	12	9	7	11	7
chill °C	15	22	15	15	18	11	11	14	9	10	16	11	12	12	7	6	10	6

Freezing level m	4100	4050	4050	3800	3700	3550	3150	2850	2550	2900	3100	3250	3050	2800	2300	1700	2050	2300

	6:50	—	—	6:50	—	—	6:52	—	—	6:54	—	—	6:54	—	—	6:56	—	—
	—	7:08	—	—	7:07	—	—	7:05	—	—	7:02	—	—	7:00	—	—	6:59	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Sun afternoon, min 9°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 29mm), heaviest during Fri morning. Very mild (max 16°C on Wed afternoon, min 7°C on Fri 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
Black Diamond 32 km SSW 192m alt. 3 hours ago		-	Calm (3 kph at 120).
Renton Airport 36 km WSW 218m alt. 2 hours ago	17°C	Clear	Light winds from the NNW (9 kph at 330).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	28°C	Dry	Calm (0 kph at 217).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	20°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 1 hour ago	14°C	Dry	Calm (0 kph at 292).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	17°C	-	Wind obs. (9 kph from 290 degs) was rejected.	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	17°C	-	Light winds from the NE (7 kph at 40).	16 km Low: few Mid: few
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 3 hours ago	17°C	Dry	Calm (3 kph at 236).
Seattle 49 km WSW 100m alt. 49 minutes ago		-	Wind obs. (10 kph from 146 degs) was rejected.

* 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.