– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Wed 19 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Wed 19 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 5°C on Fri night, min 0°C on Wed night). Winds decreasing (fresh winds from the ESE on Wed morning, calm by Thu night).									Days 4–6 Weather Summary Light rain (total 7mm) at first, then becoming colder with a dusting of snow on Mon morning. Freeze-thaw conditions (max 5°C on Sat morning, min -2°C on Mon afternoon). Winds decreasing (near gales from the SW on Sun night, light winds from the NNE by Mon night).
	Wednesday 19			Thursday 20			Friday 21			Saturday 22			Sunday 23			Monday 24
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	cloudy	light snow	some clouds	some clouds	some clouds	some clouds	some clouds	light rain	light rain	light rain	light rain	light rain	cloudy	light rain	snow shwrs	snow shwrs	cloudy
km/h	ESE	ESE	ESE	SW	SW	W	W	SSW	WSW	WSW	WSW	WSW	SW	SW	SSW	WSW	NW	NNW
See all weather maps
cm	—	—	1	—	—	—	—	—	—	—	—	—	—	—	—	2	2	—
mm	—	—	—	—	—	—	—	—	0.5	1.1	0.6	1.5	0.2	—	4	—	—	—
max°C	4	4	4	1	1	1	3	3	5	5	5	5	4	5	4	2	-1	-1
min°C	4	4	0	0	1	1	1	3	4	5	4	4	4	4	2	0	-2	-2
chill°C	-2	-1	-2	-4	-2	-1	-1	0	-1	0	0	0	-1	-1	-5	-7	-8	-7

Freezing level (m)	2100	2100	1900	1300	1400	1400	1400	2200	2300	2150	2150	2100	2100	2150	2000	1500	1150	1000
Cloud base (m)	6500	5850	2450	500	750	950	900	1800	750	450	450	450	500	900	900	500	750	700

	7:16	—	—	7:18	—	—	7:20	—	—	7:22	—	—	7:22	—	—	7:24	—	—
	—	4:25	—	—	4:24	—	—	4:23	—	—	4:22	—	—	4:22	—	—	4:22	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 5°C on Fri night, min 0°C on Wed night). Winds decreasing (fresh winds from the ESE on Wed morning, calm by Thu night).

Mount Si Weather (Days 3-6):

Light rain (total 7mm) at first, then becoming colder with a dusting of snow on Mon morning. Freeze-thaw conditions (max 5°C on Sat morning, min -2°C on Mon afternoon). Winds decreasing (near gales from the SW on Sun night, light winds from the NNE by Mon 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 43 minutes ago	2° C	-	Calm (0 kph at 229).
Renton Airport 36 km WSW 218m alt. 2 hours ago	4° C	Dry and cloudy.	Calm.(Wind varies from 004 to 010 degs) (0 kph at 0).	16 km Low: overcast
Auburn 39 km SW 119m alt. 50 minutes ago	6° C	Dry	Calm (0 kph at 121).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-3° C	-	Wind obs. (6 kph from 1 degs) was rejected.	0.0 km
SHIP8275 42 km WSW 3m alt. 3 hours ago	6° C		Light winds from the N (9 kph at 0).
SHIP4108 42 km WSW 15m alt. 3 hours ago			Light winds from the N (8 kph at 0).	- km
SHIP2904 42 km WSW 15m alt. 1 hour ago			Light winds from the N (10 kph at 350).	- km
SHIP5334 42 km WSW 3m alt. 1 hour ago	6° C		Light winds from the N (8 kph at 0).
SHIP3914 42 km WSW 3m alt. 2 hours ago	6° C		Light winds from the NNW (9 kph at 330).
SHIP7515 42 km WSW 3m alt. 3 hours ago	6° C		Light winds from the N (8 kph at 0).

* 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.