– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Fri 15 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Fri 15 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A moderate fall of snow, heaviest on Fri afternoon. Freeze-thaw conditions (max 4°C on Sun afternoon, min -1°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri night, calm by Sun afternoon).											Days 5–7 Weather Summary Light rain (total 3mm), mostly falling on Tue night. Mild temperatures (max 8°C on Wed afternoon, min 3°C on Mon night). Wind will be generally light.
	Fri 15		Saturday 16			Sunday 17			Monday 18			Tuesday 19			Wednesday 20
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	snow shwrs	light snow	some clouds	cloudy	rain shwrs	some clouds	some clouds	rain shwrs	rain shwrs	rain shwrs	rain shwrs	rain shwrs	rain shwrs	rain shwrs	cloudy
km/h	WSW	SW	W	NNW	NNW	NNW	W	NW	WNW	WNW	NW	NNW	WNW	WNW	NNW	NW	WSW
See all weather maps
cm	5	3	2	3	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	0.2	—	—	0.2	0.5	0.3	0.7	1.3	0.2	0.1	—
max °C	0	0	-1	1	0	1	4	4	4	6	6	4	7	6	4	8	7
min °C	0	-1	-1	0	-1	0	2	3	4	5	3	3	5	4	3	6	5
chill °C	-7	-8	-7	-3	-7	-4	2	1	3	3	2	2	4	2	0	4	3

Freezing level m	1250	1150	1150	1400	1200	1350	1950	1900	1800	2050	1850	2050	2350	2200	2200	2900	3050
Cloud base (m)	400	500	450	650	550	500	700		950	950	850	500	750	500	550	700	1800

	—	—	5:28	—	—	5:26	—	—	5:26	—	—	5:24	—	—	5:24	—	—
	—	8:37	—	—	8:37	—	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow, heaviest on Fri afternoon. Freeze-thaw conditions (max 4°C on Sun afternoon, min -1°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri night, calm by Sun afternoon).

Mount Si Weather (Days 3-6):

Light rain (total 3mm), mostly falling on Tue night. Mild temperatures (max 8°C on Wed afternoon, min 3°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
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 324).
Snoqualmie Pass 30 km ESE 824m alt. 43 minutes ago	4° C	-	Calm (0 kph at 20).
Renton 30 km WSW 160m alt. 51 minutes ago	8° C	Dry	Calm (0 kph at 215).
Black Diamond 32 km SSW 192m alt. 50 minutes ago		-	Wind obs. (6 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 37 minutes ago	7° C	Dry	Calm (0 kph at 123).
Renton Airport 36 km WSW 218m alt. 2 hours ago	10° C	Moderate rain .	Light winds from the S (15 kph at 170).	6 km Mid: few High: overcast
Grotto wx 39 km NE 1101m alt. 32 minutes ago	0° C	-	Calm (0 kph at 253).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 342).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	-	Light winds from the W (13 kph at 270).	0.0 km
Woodinville 43 km WNW 137.2m alt. 3 hours ago	7° C	Dry	Wind obs. (10 kph from 284 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.