– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Wed 12 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Wed 12 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Some drizzle, heaviest during Thu night. Very mild (max 18°C on Thu afternoon, min 11°C on Wed morning). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 18°C on Sat afternoon, min 11°C on Mon night). Wind will be generally light.
	Wednesday 12			Thursday 13			Friday 14			Saturday 15			Sunday 16			Monday 17
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	rain shwrs	some clouds	clear	risk tstorm	rain shwrs	risk tstorm	clear	clear	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	clear	clear
Cloud base (m)		1900		3450	3300	1850	3450	3350		8350							8550
km/h	NNW	NW	N	ESE	N	E	SSE	W	NNE	NNE	WNW	NNW	WNW	WNW	NNW	NNW	NW	NW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	0.3	—	—	0.7	0.5	0.2	—	—	—	—	—	—	—	—	—	—
max °C	11	15	14	15	18	17	16	18	17	15	18	17	15	17	16	13	16	15
min °C	11	14	12	13	17	15	15	16	14	14	16	14	14	16	12	12	14	11
chill °C	9	14	11	13	17	15	15	16	14	14	16	14	14	16	11	11	14	10

Freezing level m	3500	3600	3600	3500	3550	3600	3500	3650	3650	3800	3900	3900	3850	4000	4000	3850	3700	3550

	5:58	—	—	5:58	—	—	6:01	—	—	6:01	—	—	6:03	—	—	6:05	—	—
	—	—	8:23	—	—	8:22	—	—	8:21	—	—	8:19	—	—	8:16	—	—	8:15

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Thu night. Very mild (max 18°C on Thu afternoon, min 11°C on Wed morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 18°C on Sat afternoon, min 11°C on Mon 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. 1 hour ago	22° C	Dry	Calm (3 kph at 248).
Black Diamond 32 km SSW 192m alt. 36 minutes ago		-	Calm (5 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	22° C	-	Light winds from the N (9 kph at 0).	16 km Low: few
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (2 kph at 221).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	14° C	-	Wind obs. (9 kph from 1 degs) was rejected.	16 km Low: few
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	21° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	19° C	Dry and partly cloudy.	Wind obs. (7 kph from 130 degs) was rejected.	16 km Low: scattered Mid: scattered High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 38 minutes ago	22° C	Dry	Light winds from the NW (6 kph at 307).
Seattle 49 km WSW 100m alt. 26 minutes ago	31° C	-	Moderate winds from the SW (26 kph at 230).

* 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.