– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Fri 16 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Fri 16 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 4mm), mostly falling on Fri night. Warm (max 23°C on Fri afternoon, min 5°C on Sat night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 14°C on Wed afternoon, min 5°C on Mon night). Wind will be generally light.
	Fri 16		Saturday 17			Sunday 18			Monday 19			Tuesday 20			Wednesday 21
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	rain shwrs	light rain	rain shwrs	clear	clear	clear	cloudy	cloudy	some clouds	some clouds	clear	clear	clear	clear	clear	some clouds
Cloud base (m)	8700		550	6400				4900	4600	3300	2750					7750
km/h	S	SSW	WSW	NNW	NE	N	NNW	ESE	WSW	W	ENE	NNW	NNW	ESE	SW	WNW	SSE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	2	1.9	0.3	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	23	15	11	10	8	10	12	9	10	11	9	9	11	8	13	14	10
min °C	22	12	9	10	5	5	11	8	8	10	5	5	11	8	8	13	8
chill °C	22	10	8	10	5	4	11	8	8	10	5	5	11	8	7	13	8

Freezing level m	3850	3250	2000	2050	2100	2650	2900	2600	2050	1850	1700	1900	2350	2600	2800	2750	2650

	—	—	7:28	—	—	7:28	—	—	7:30	—	—	7:31	—	—	7:33	—	—
	6:16	—	—	6:15	—	—	6:14	—	—	6:12	—	—	6:09	—	—	6:07	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Fri night. Warm (max 23°C on Fri afternoon, min 5°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 14°C on Wed afternoon, min 5°C on Mon 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 Airport 36 km WSW 218m alt. 2 hours ago	19°C	Clear	Light winds from the SSE (7 kph at 150).	16 km
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	9°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 252).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	21°C	Dry and partly cloudy.	Light winds from the ESE (7 kph at 120).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	21°C	Dry and partly cloudy.	Light winds from the SSE (11 kph at 160).	16 km Low: few Mid: scattered
BUOY-EBSW1 46 km W 3m alt. 56 minutes ago
Snohomish 49 km NW 196m alt. 39 minutes ago	9°C	Dry	Calm (0 kph at 266).
Seattle 49 km WSW 100m alt. 49 minutes ago	24°C	-	Wind obs. (16 kph from 312 degs) was rejected.
BUOY-WPOW1 55 km W 3m alt. 44 minutes ago	16°C		Calm (5 kph at 140).
BUOY-TCNW1 57 km SW 3m alt. 56 minutes ago

* 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.