– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Mon 13 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Mon 13 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A heavy fall of snow, heaviest during Wed night. Temperatures will be below freezing (max 0°C on Mon morning, min -5°C on Tue night). Winds decreasing (near gales from the SW on Tue night, light winds from the WNW by Wed night).									Days 4–6 Weather Summary A dusting of snow on Thu night. Freezing level rising with drizzle on Sat night. Freeze-thaw conditions (max 5°C on Sat afternoon, min -4°C on Thu morning). Wind will be generally light.
	Monday 13			Tuesday 14			Wednesday 15			Thursday 16			Friday 17			Saturday 18
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	cloudy	light snow	light snow	heavy snow	light snow	light snow	snow shwrs	some clouds	some clouds	light snow	some clouds	cloudy	cloudy	some clouds	light rain	light rain
km/h	SW	WSW	SW	SSW	SW	SW	SW	SW	NNW	W	W	SW	SW	W	NW	SSE	SE	ESE
See all weather maps
cm	2	2	—	1	4	12	2	4	8	—	—	2	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	1
max °C	0	0	-1	-1	-1	-1	-5	-4	-5	-4	-2	-2	-3	-1	-1	2	5	5
min °C	0	0	-2	-2	-1	-5	-5	-5	-5	-4	-2	-3	-3	-1	-2	1	4	5
chill °C	-7	-6	-9	-10	-9	-11	-10	-12	-12	-8	-7	-8	-7	-3	-2	-2	3	2

Freezing level m	1250	1300	1000	1150	1150	700	600	700	350	850	1050	800	950	1150	900	1600	2000	2200
Cloud base (m)	450	400	600	400	400	400	400	400	450	450	700	450	500	650	750	2200	2450	1500

	6:22	—	—	6:20	—	—	6:18	—	—	6:16	—	—	6:15	—	—	6:13	—	—
	—	7:52	—	—	7:53	—	—	7:55	—	—	7:57	—	—	7:58	—	—	—	8:00

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Wed night. Temperatures will be below freezing (max 0°C on Mon morning, min -5°C on Tue night). Winds decreasing (near gales from the SW on Tue night, light winds from the WNW by Wed night).

Mount Si Weather (Days 3-6):

A dusting of snow on Thu night. Freezing level rising with drizzle on Sat night. Freeze-thaw conditions (max 5°C on Sat afternoon, min -4°C on Thu morning). 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. 2 hours ago	8° C	Dry	Calm (0 kph at 72).
Snoqualmie Pass 30 km ESE 824m alt. 42 minutes ago	3° C	-	Calm (0 kph at 181).
Renton 30 km WSW 160m alt. 2 hours ago	8° C	Dry	Calm (3 kph at 186).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (3 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	7° C	Dry	Calm (2 kph at 253).
Renton Airport 36 km WSW 218m alt. 2 hours ago	10° C	Dry and cloudy.	Light winds from the S (13 kph at 180).	16 km Low: broken Mid: overcast
Grotto wx 39 km NE 1101m alt. 2 hours ago	2° C	-	Calm (0 kph at 270).
Auburn 39 km SW 119m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 269).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	1° C	-	Wind obs. (11 kph from 1 degs) was rejected.	0.0 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	7° C	Dry	Wind obs. (8 kph from 273 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.