– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sun 09 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Sun 09 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 23°C on Tue afternoon, min 12°C on Sun night). Wind will be generally light.											Days 5–7 Weather Summary Some drizzle, heaviest during Sat morning. Warm (max 27°C on Fri afternoon, min 16°C on Wed night). Wind will be generally light.
	Sun 9		Monday 10			Tuesday 11			Wednesday 12			Thursday 13			Friday 14
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	rain shwrs	clear	clear	clear	some clouds	clear	rain shwrs
Cloud base (m)			9300	8550								3500	3700		3150	3700	3300
km/h	NW	NE	NW	NNW	NE	NW	NW	NNE	NW	NW	ENE	NW	NW	ESE	WNW	WNW	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	0.1	—	—	—	—	—	0.3
max °C	22	18	18	22	19	19	23	18	19	23	19	22	26	22	22	27	23
min °C	21	12	15	21	13	15	22	13	15	21	16	19	25	19	21	26	17
chill °C	21	12	15	21	13	15	22	13	15	21	16	19	25	19	21	26	17

Freezing level m	4050	4000	4050	4000	4150	3900	3850	3850	3750	3800	3800	3700	3850	3900	3700	3900	3750

	—	—	5:54	—	—	5:56	—	—	5:58	—	—	5:58	—	—	6:01	—	—
	—	8:29	—	—	8:27	—	—	8:25	—	—	8:23	—	—	8:22	—	—	8:21

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 23°C on Tue afternoon, min 12°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Sat morning. Warm (max 27°C on Fri afternoon, min 16°C on Wed 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. 1 hour ago	23° C	Dry	Calm (2 kph at 0).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (13 kph from 288 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 3 hours ago	25° C	Clear	Light winds from the N (9 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	27° C	Dry	Calm (5 kph at 91).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	17° C	Clear	Wind obs. (11 kph from 1 degs) was rejected.	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	23° C	-	Light winds from the WNW (11 kph at 300).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	25° C	Dry and partly cloudy.	Light winds from the NNW (11 kph at 330).	16 km Low: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 42 minutes ago	19° C	Dry	Calm (3 kph at 202).
Seattle 49 km WSW 100m alt. 1 hour ago	29° C	-

* 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.