– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Tue 17 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Tue 17 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 79mm), heaviest during Tue night. Mild temperatures (max 7°C on Tue afternoon, min 5°C on Wed afternoon). Mainly near gales.											Days 5–7 Weather Summary Moderate rain (total 16mm), heaviest on Fri afternoon giving way to a moderate fall of snow, heaviest on Sat morning. Freeze-thaw conditions (max 5°C on Fri afternoon, min -5°C on Sat morning). Winds decreasing (strong winds from the SW on Fri afternoon, calm by Sun night).
	Tue 17		Wednesday 18			Thursday 19			Friday 20			Saturday 21			Sunday 22
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	heavy rain	heavy rain	light rain	mod. rain	mod. rain	light rain	mod. rain	heavy rain	heavy rain	light snow	mod. snow	light snow	snow shwrs	cloudy	cloudy	snow shwrs
km/h	SW	SW	SW	SSW	SW	SW	SW	SW	WSW	SW	WSW	WNW	WNW	SSW	WSW	WSW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	1	6	3	1	—	—	1
mm	5	24	11	2	6	7	5	8	11	13	3	—	—	—	—	—	—
max °C	7	7	6	6	7	6	6	7	7	5	3	-5	-3	-4	-3	-2	-1
min °C	6	6	6	5	5	6	6	6	6	5	-4	-5	-4	-5	-4	-3	-4
chill °C	1	1	0	-1	-1	0	0	1	2	-1	-11	-10	-10	-9	-11	-9	-4

Freezing level m	2750	2850	2600	2650	2700	2750	2850	2900	2450	2100	850	600	850	0	800	950	500
Cloud base (m)	400	400	450	600	900	450	450	400	400	400	450	450	450	500	650	450	450

	—	—	7:13	—	—	7:11	—	—	7:09	—	—	7:07	—	—	7:05	—	—
	7:14	—	—	7:15	—	—	7:16	—	—	7:19	—	—	7:20	—	—	7:22	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 79mm), heaviest during Tue night. Mild temperatures (max 7°C on Tue afternoon, min 5°C on Wed afternoon). Mainly near gales.

Mount Si Weather (Days 3-6):

Moderate rain (total 16mm), heaviest on Fri afternoon giving way to a moderate fall of snow, heaviest on Sat morning. Freeze-thaw conditions (max 5°C on Fri afternoon, min -5°C on Sat morning). Winds decreasing (strong winds from the SW on Fri afternoon, calm by Sun night).

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. 2 hours ago	12° C	Dry	Calm (0 kph at 341).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	3° C	-	Calm (0 kph at 219).
Black Diamond 32 km SSW 192m alt. 47 minutes ago		-	Calm (5 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	6° C	Light rain.	Calm (2 kph at 84).
Renton Airport 36 km WSW 218m alt. 3 hours ago	13° C	Light rain .	Light winds from the S (11 kph at 180).	16 km Low: few Mid: few High: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	3° C	Dry	Calm (2 kph at 314).
Auburn 39 km SW 119m alt. 59 minutes ago	19° C	Dry	Calm (0 kph at 85).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	6° C	Moderate rain .	Calm (0 kph at 0).	0 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	9° C	Dry	Calm (2 kph at 338).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	12° C	Light rain .	Light winds from the SSE (15 kph at 160).	16 km Low: broken Mid: overcast

* 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.