– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Thu 02 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Thu 02 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 12°C on Sun morning, min -2°C on Thu night). Winds decreasing (fresh winds from the WSW on Thu night, calm by Fri night).											Days 5–7 Weather Summary Some drizzle, heaviest during Tue afternoon. Freeze-thaw conditions (max 12°C on Sun afternoon, min -1°C on Tue night). Winds decreasing (strong winds from the SW on Mon night, calm by Tue night).
	Thu 2		Friday 3			Saturday 4			Sunday 5			Monday 6			Tuesday 7
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	some clouds	some clouds	some clouds	clear	clear	clear	some clouds	some clouds	some clouds	cloudy	some clouds	rain shwrs	light rain	rain shwrs	clear
km/h	WSW	SW	SW	WSW	NNW	NE	ENE	ESE	ESE	ESE	ESE	SSW	WSW	SW	SW	WSW	SW
See all weather maps
cm	1	2	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	0.4	0.5	—
max °C	-1	-1	0	3	2	5	7	9	12	12	12	12	12	10	2	3	1
min °C	-1	-2	-2	2	1	3	6	8	10	12	11	11	11	4	2	2	-1
chill °C	-7	-7	-4	1	1	0	6	8	9	11	10	11	10	-2	-5	-4	-1

Freezing level m	1150	1000	1300	1600	1600	2450	2700	3050	3100	3150	3150	2900	2800	2350	1750	1850	1100
Cloud base (m)	450	450	700	1650	950		8250	6300	6950	7000	6700	6650		2900	450	550

	—	—	6:41	—	—	6:39	—	—	6:37	—	—	6:35	—	—	6:33	—	—
	7:37	—	—	7:38	—	—	7:39	—	—	7:40	—	—	7:43	—	—	7:44	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 12°C on Sun morning, min -2°C on Thu night). Winds decreasing (fresh winds from the WSW on Thu night, calm by Fri night).

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Tue afternoon. Freeze-thaw conditions (max 12°C on Sun afternoon, min -1°C on Tue night). Winds decreasing (strong winds from the SW on Mon night, calm by Tue 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. 31 minutes ago	9° C	Dry	Calm (0 kph at 350).
Renton 30 km WSW 160m alt. 1 hour ago	9° C	Dry	Light winds from the SW (14 kph at 230).
Black Diamond 32 km SSW 192m alt. 35 minutes ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Dry and cloudy.	Light winds from the SSW (15 kph at 200).	16 km Low: overcast
Auburn 39 km SW 119m alt. 44 minutes ago		-	Calm (3 kph at 294).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	-	Light winds from the N (9 kph at 1).	0.0 km
SHIP2322 42 km WSW 15m alt. 1 hour ago				- km
SHIP4276 42 km WSW 15m alt. 3 hours ago				- km
SHIP8999 42 km WSW 15m alt. 3 hours ago				- km
SHIP4951 42 km WSW 3m alt. 3 hours ago	12° C

* 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.