– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Sat 12 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Sat 12 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 31mm), heaviest during Sun afternoon. Very mild (max 10°C on Sat night, min 4°C on Sat night). Winds decreasing (fresh winds from the SW on Sun morning, calm by Mon afternoon).										Days 5–7 Weather Summary Mostly dry. Very mild (max 18°C on Thu afternoon, min 10°C on Tue night). Wind will be generally light.
		Sunday 13			Monday 14			Tuesday 15			Wednesday 16			Thursday 17
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	heavy rain	mod. rain	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	rain shwrs	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	400	400	400	550	650	950		3050	950
km/h	WSW	SW	WSW	SW	W	NNW	NNW	NE	ENE	ENE	ESE	NE	ENE	SSW	WSW	W
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	6	13	9	2	0.2	0.1	—	—	0.1	—	—	—	—	—	—	—
max °C	10	5	6	6	6	8	7	8	10	11	14	16	16	17	18	16
min °C	4	5	5	5	5	7	7	7	9	10	12	15	15	16	17	14
chill °C	-1	1	0	1	3	7	6	6	9	9	12	15	15	16	17	14

Freezing level m	2300	2200	2400	2900	3450	3300	3250	2550	2850	3450	3850	4050	4100	4100	4100	4250

	—	6:41	—	—	6:41	—	—	6:43	—	—	6:45	—	—	6:46	—	—
	—	—	7:22	—	—	7:21	—	—	7:19	—	—	7:16	—	—	7:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 31mm), heaviest during Sun afternoon. Very mild (max 10°C on Sat night, min 4°C on Sat night). Winds decreasing (fresh winds from the SW on Sun morning, calm by Mon afternoon).

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 18°C on Thu afternoon, min 10°C on Tue night). Wind will be generally light.

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. 2 hours ago	12°C	Dry	Calm (0 kph at 138).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Light rain .	Light winds from the SSE (7 kph at 150).	8 km Mid: few High: broken
Auburn 39 km SW 119m alt. 1 hour ago	21°C	Dry	Calm (0 kph at 37).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	8°C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: scattered Mid: broken High: overcast
Monroe 44 km NW 80m alt. 1 hour ago	17°C	Dry	Calm (0 kph at 81).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14°C	Light rain .	Light winds from the SSE (17 kph at 150).	8 km Mid: scattered High: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 1 hour ago	13°C	Dry and cloudy.	Light winds from the ESE (15 kph at 110).	16 km Low: scattered Mid: broken High: overcast
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Parkwood Lane Mobile Home Park wx 46 km SW 111m alt. 2 hours ago	16°C	Dry	Light winds from the SSE (8 kph at 148).

* 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.