– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Sun 23 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Sun 23 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mild with light rain (total 7mm) on Sun morning Becoming colder with a light covering of snow, mostly falling on Sun night. Freeze-thaw conditions (max 3°C on Sun morning, min -3°C on Sun night). Winds decreasing (fresh winds from the SW on Sun morning, calm by Mon night).									Days 4–6 Weather Summary Mild with light rain (total 5mm) on Wed night Becoming colder with a light covering of snow, mostly falling on Thu night. Freeze-thaw conditions (max 4°C on Wed afternoon, min -3°C on Fri night). Wind will be generally light.
	Sunday 23			Monday 24			Tuesday 25			Wednesday 26			Thursday 27			Friday 28
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	cloudy	light snow	light snow	cloudy	cloudy	cloudy	cloudy	light snow	light rain	light rain	light rain	light rain	light rain	light snow	light snow	some clouds	cloudy
km/h	SW	WSW	SW	SW	SW	SW	SE	S	SW	SW	SSE	SSE	S	ESE	ESE	W	NNW	SW
See all weather maps
cm	1	—	3	1	—	—	—	—	2	—	—	—	—	—	4	2	—	—
mm	6	—	—	—	—	—	—	—	0.7	0.1	0.2	2	0.8	1.3	—	—	—	—
max°C	3	1	-2	-2	-2	0	0	1	3	3	4	4	4	3	2	-1	-2	-2
min°C	2	0	-3	-2	-3	-3	-1	0	1	3	4	3	2	3	-1	-1	-2	-3
chill°C	-3	-4	-10	-8	-6	-6	-5	-3	-4	-1	2	1	-2	0	-1	-3	-4	-6

Freezing level (m)	1750	1400	850	950	900	800	1400	1300	1750	2050	2050	1900	2000	1900	1450	1100	950	750
Cloud base (m)	400	450	750	500	500	600	2700	950	450	450	700	400	950	600	400	450	450	550

	7:22	—	—	7:24	—	—	7:26	—	—	7:26	—	—	7:28	—	—	7:30	—	—
	—	4:22	—	—	4:22	—	—	4:21	—	—	4:20	—	—	4:20	—	—	4:19	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with light rain (total 7mm) on Sun morning Becoming colder with a light covering of snow, mostly falling on Sun night. Freeze-thaw conditions (max 3°C on Sun morning, min -3°C on Sun night). Winds decreasing (fresh winds from the SW on Sun morning, calm by Mon night).

Mount Si Weather (Days 3-6):

Mild with light rain (total 5mm) on Wed night Becoming colder with a light covering of snow, mostly falling on Thu night. Freeze-thaw conditions (max 4°C on Wed afternoon, min -3°C on Fri 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 5 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 301).
Black Diamond 32 km SSW 192m alt. 42 minutes ago	16° C	Dry	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Light winds from the N (6 kph at 350).	16 km Low: overcast
Auburn 39 km SW 119m alt. 31 minutes ago	9° C	Dry	Calm (0 kph at 222).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Light rain .	Wind obs. (7 kph from 1 degs) was rejected.	1 km Mid: broken High: overcast
SHIP3915 42 km WSW 15m alt. 2 hours ago				- km
SHIP3883 42 km WSW 15m alt. 2 hours ago			Calm (4 kph at 80).	- km
SHIP4268 42 km WSW 15m alt. 3 hours ago			Calm (2 kph at 170).	- km
SHIP4715 42 km WSW 3m alt. 1 hour ago
SHIP4308 42 km WSW 15m alt. 3 hours ago				- km

* 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.