– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Mon 19 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Mon 19 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 18°C on Wed afternoon, min 9°C on Mon night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 15°C on Sun morning, min 5°C on Fri night). Wind will be generally light.
	Mon 19		Tuesday 20			Wednesday 21			Thursday 22			Friday 23			Saturday 24
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	clear	clear	clear	clear	clear	some clouds	clear	some clouds	rain shwrs	rain shwrs	rain shwrs	clear	clear	some clouds	some clouds
Cloud base (m)		7000					9150		9000	2850	750	600	800			6600	6750
km/h	NNW	E	E	NNE	ESE	W	W	SSE	WNW	WNW	NW	NW	NNW	E	NNW	NW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	0.1	0.2	0.4	—	—	—	—
max °C	13	10	14	16	13	16	18	12	12	13	7	7	8	5	11	13	10
min °C	13	9	9	15	12	12	16	10	9	11	6	6	7	5	6	12	9
chill °C	13	9	8	15	12	12	16	10	9	11	4	4	6	5	6	12	9

Freezing level m	2650	2800	3100	3050	3150	3050	3150	3100	2850	2350	1550	1350	1400	2850	3100	3150	3250

	—	—	7:31	—	—	7:33	—	—	7:35	—	—	7:35	—	—	7:37	—	—
	6:12	—	—	6:09	—	—	6:07	—	—	6:06	—	—	6:05	—	—	6:02	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 18°C on Wed afternoon, min 9°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 15°C on Sun morning, min 5°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. 2 hours ago	11°C	Dry	Calm (0 kph at 349).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 250).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14°C	Clear	Light winds from the NNW (11 kph at 340).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	14°C	Dry	Calm (2 kph at 218).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	6°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 1 hour ago	11°C	Dry	Calm (0 kph at 71).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	13°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	12°C	Dry and partly cloudy.	Light winds from the N (15 kph at 0).	16 km Low: few Mid: broken
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 2 hours ago	6°C	Dry	Calm (0 kph at 126).

* 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.