– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Sun 13 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Sun 13 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Moderate rain (total 12mm), heaviest on Sun afternoon. Very mild (max 18°C on Wed morning, min 9°C on Mon night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Warm (max 22°C on Thu afternoon, min 13°C on Fri night). Wind will be generally light.
	Sun 13		Monday 14			Tuesday 15			Wednesday 16			Thursday 17			Friday 18
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	rain shwrs	rain shwrs	rain shwrs	some clouds	cloudy	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	400	600	600	900	6450	2450	1850					9000
km/h	SW	SSW	WSW	NW	ESE	NW	NNW	E	N	NNW	E	NW	WNW	SSE	W	W	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	9	2	0.4	0.2	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	10	11	11	15	12	13	15	13	18	21	16	21	22	17	18	21	16
min °C	10	11	10	14	9	11	15	11	13	21	15	16	22	14	14	20	13
chill °C	8	10	10	14	9	11	15	11	13	21	15	16	22	14	14	20	13

Freezing level m	2450	2800	3400	3350	3200	2550	2650	3100	3750	3800	3950	3900	3900	3900	4000	4150	4150

	—	—	6:41	—	—	6:43	—	—	6:45	—	—	6:46	—	—	6:47	—	—
	7:22	—	—	7:21	—	—	7:19	—	—	7:16	—	—	7:15	—	—	7:13	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 12mm), heaviest on Sun afternoon. Very mild (max 18°C on Wed morning, min 9°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 22°C on Thu afternoon, min 13°C on Fri 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. 31 minutes ago	14°C	Dry	Calm (0 kph at 128).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 286).
Renton Airport 36 km WSW 218m alt. 1 hour ago	16°C	Dry and cloudy.	Light winds from the SSE (9 kph at 160).	16 km Low: scattered Mid: scattered High: overcast
Auburn 39 km SW 119m alt. 58 minutes ago		-	Calm (0 kph at 203).
Stampede Pass Airport 40 km SE 628m alt. 48 minutes ago	7°C	Moderate rain .	Light winds from the W (9 kph at 270).	1 km Mid: broken High: overcast
Monroe 44 km NW 80m alt. 41 minutes ago	12°C	Dry	Calm (0 kph at 280).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	16°C	Dry and cloudy.	Moderate winds from the SSE (20 kph at 150).	16 km Low: few Mid: broken High: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 1 hour ago	15°C	Dry and cloudy.	Light winds from the S (19 kph at 180).	16 km Low: few Mid: few High: overcast
BUOY-EBSW1 46 km W 3m alt. 56 minutes ago
Snohomish 49 km NW 196m alt. 1 hour ago	17°C	Dry	Wind obs. (11 kph from 183 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.