– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Sat 29 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Sat 29 Nov 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 2°C on Sun night, min -1°C on Sat afternoon). Wind will be generally light.											Days 5–7 Weather Summary A dusting of snow. Milder later with heavy rain (total 25mm) on Thu night. Freeze-thaw conditions (max 4°C on Thu afternoon, min -1°C on Tue afternoon). Winds increasing (calm on Tue night, near gales from the WSW by Thu afternoon).
	Sat 29		Sunday 30			Monday 1			Tuesday 2			Wednesday 3			Thursday 4
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	some clouds	clear	some clouds	some clouds	cloudy	light snow	cloudy	cloudy	some clouds	cloudy	some clouds	cloudy	light snow	light rain	heavy rain
km/h	WSW	NE	SW	NW	NNW	N	NW	SW	NNW	NW	SSW	W	WNW	NW	SW	WSW	W
See all weather maps
cm	—	—	—	—	—	—	—	3	—	—	—	—	—	—	2	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	3	4	17
max°C	1	0	1	1	2	1	2	1	0	-1	1	1	1	2	2	4	3
min°C	-1	-1	1	1	1	1	1	0	0	-1	0	1	0	1	2	4	3
chill°C	-1	-1	1	-1	-2	-3	-1	-4	-4	-4	0	-1	-2	-2	-4	-3	-4

Freezing level (m)	1500	950	1400	1600	1900	1650	1850	1400	1250	1150	1300	1400	1300	1600	2050	2350	2000
Cloud base (m)	2900		7050	7850	2600	2250	1750	850	450	500	700	600	2000	850	600	400	400

	—	—	7:31	—	—	7:33	—	—	7:35	—	—	7:35	—	—	7:37	—	—
	4:17	—	—	4:17	—	—	4:16	—	—	4:16	—	—	4:16	—	—	4:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 2°C on Sun night, min -1°C on Sat afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

A dusting of snow. Milder later with heavy rain (total 25mm) on Thu night. Freeze-thaw conditions (max 4°C on Thu afternoon, min -1°C on Tue afternoon). Winds increasing (calm on Tue night, near gales from the WSW by Thu afternoon).

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. 34 minutes ago	1° C	-	Calm (0 kph at 284).
Black Diamond 32 km SSW 192m alt. 47 minutes ago	11° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	5° C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 32 minutes ago	4° C	Dry	Calm (0 kph at 38).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-4° C	Mist -.	Calm (0 kph at 0).	5 km Low: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	6° C	-	Calm (0 kph at 0).	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	4° C	-	Light winds from the N (9 kph at 10).	16 km Low: few Mid: few
Snohomish 49 km NW 196m alt. 27 minutes ago	3° C	Dry	Wind obs. (6 kph from 20 degs) was rejected.
Seattle 49 km WSW 100m alt. 1 hour ago	13° C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	7° C		Light winds from the N (13 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.