– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Wed 19 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Wed 19 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 28°C on Fri afternoon, min 17°C on Wed night). Wind will be generally light.											Days 5–7 Weather Summary Light rain (total 5mm), mostly falling on Sat afternoon. Warm (max 24°C on Mon afternoon, min 12°C on Sun night). Wind will be generally light.
	Wed 19		Thursday 20			Friday 21			Saturday 22			Sunday 23			Monday 24
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	some clouds	some clouds	rain shwrs	rain shwrs	risk tstorm	rain shwrs	light rain	rain shwrs	clear	clear	clear	clear
Cloud base (m)		8650				4850	6500		800	550	900	500	500
km/h	NW	ENE	WNW	NW	E	NW	WNW	E	WSW	WSW	WSW	SW	W	NE	NNW	NW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	0.1	0.5	4	0.4	1	0.1	—	—	—	—
max °C	24	21	24	27	23	25	28	23	19	17	14	13	16	15	20	24	19
min °C	23	17	20	26	20	22	28	19	18	15	13	13	14	12	15	23	15
chill °C	23	17	20	26	20	22	28	19	18	15	12	12	14	12	15	23	15

Freezing level m	4350	4400	4450	4600	4650	4550	4550	4250	4050	3550	3200	3250	3850	4200	4150	4100	4050

	—	—	6:09	—	—	6:09	—	—	6:11	—	—	6:13	—	—	6:13	—	—
	—	8:12	—	—	8:09	—	—	8:07	—	—	8:07	—	—	8:05	—	—	8:02

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 28°C on Fri afternoon, min 17°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 5mm), mostly falling on Sat afternoon. Warm (max 24°C on Mon afternoon, min 12°C on Sun 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	27° C	Dry	Calm (2 kph at 0).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (21 kph from 107 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	27° C	Clear	Light winds from the N (7 kph at 350).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	24° C	Dry	Wind obs. (11 kph from 207 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	27° C	Clear	Light winds from the N (9 kph at 1).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	28° C	-	Light winds from the NNW (11 kph at 340).	16 km Low: few Mid: few
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 58 minutes ago	23° C	Dry	Calm (3 kph at 214).
Seattle 49 km WSW 100m alt. 56 minutes ago	24° C	-
SHIP9699 51 km W 3m alt. 3 hours ago			Calm (4 kph at 160).

* 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.