– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Tue 11 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Tue 11 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 24°C on Thu afternoon, min 13°C on Tue night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 25°C on Fri afternoon, min 15°C on Fri night). Wind will be generally light.
	Tuesday 11			Wednesday 12			Thursday 13			Friday 14			Saturday 15			Sunday 16
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	some clouds	rain shwrs	rain shwrs	clear	clear	rain shwrs	rain shwrs	clear	clear	rain shwrs	rain shwrs	rain shwrs	cloudy	some clouds	some clouds
Cloud base (m)				750	950		3450	3450	3300	3000	3500			4150		6600	6050	8350
km/h	NW	NW	NNE	WNW	NW	E	NW	WNW	ESE	W	NW	ESE	WNW	ENE	E	WNW	WNW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.1	0.1	—	—	0.4	0.1	—	—	0.1	1.6	0.7	—	—	—
max °C	19	22	18	17	19	18	20	24	21	22	25	22	20	21	18	21	25	21
min °C	15	21	13	15	18	14	16	23	17	18	24	15	17	20	16	17	24	17
chill °C	15	21	13	15	18	14	16	23	17	18	24	15	17	20	16	17	24	17

Freezing level m	3900	3850	3900	3600	3650	3650	3550	3650	3700	3600	3750	3800	3850	3900	3950	4000	3950	4000

	5:56	—	—	5:58	—	—	5:58	—	—	6:01	—	—	6:01	—	—	6:03	—	—
	—	—	8:25	—	—	8:23	—	—	8:22	—	—	8:21	—	—	8:19	—	—	8:16

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 24°C on Thu afternoon, min 13°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 25°C on Fri afternoon, min 15°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. 1 hour ago	20° C	Dry	Calm (3 kph at 225).
Black Diamond 32 km SSW 192m alt. 57 minutes ago		-	Light winds from the NW (8 kph at 314).
Renton Airport 36 km WSW 218m alt. 3 hours ago	18° C	Clear	Wind obs. (9 kph from 180 degs) was rejected.	16 km
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 225).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	14° C	Clear	Wind obs. (7 kph from 1 degs) was rejected.	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	20° C	Clear	Light winds from the N (7 kph at 1).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	16° C	Dry and partly cloudy.	Wind obs. (6 kph from 240 degs) was rejected.	16 km Low: scattered Mid: scattered
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 47 minutes ago	19° C	Dry	Wind obs. (6 kph from 205 degs) was rejected.
Seattle 49 km WSW 100m alt. 1 hour ago	31° C	-	Wind obs. (14 kph from 186 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.