– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Tue 10 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Tue 10 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Freeze-thaw conditions (max 3°C on Tue afternoon, min -1°C on Thu afternoon). Wind will be generally light.											Days 5–7 Weather Summary A moderate fall of snow, heaviest on Fri afternoon. Freeze-thaw conditions (max 4°C on Sun night, min -2°C on Fri afternoon). Winds increasing (calm on Sat morning, near gales from the ESE by Mon morning).
	Tue 10		Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	some clouds	clear	some clouds	cloudy	light snow	light snow	cloudy	light snow	light snow	cloudy	some clouds	some clouds
km/h	E	NE	ESE	SE	SW	SW	SW	SW	SSW	SW	WSW	S	NE	SSE	SSW	SW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	4	4	—	1	5	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	3	1	3	3	3	1	0	-1	-1	-1	-2	-1	-1	0	1	0	4
min °C	2	1	3	3	1	1	-1	-1	-1	-2	-2	-1	-1	-1	0	0	1
chill °C	-1	-2	1	1	-2	-3	-5	-6	-6	-7	-8	-1	-1	-4	-5	-4	-2

Freezing level m	1650	1600	1750	1850	1950	1400	1300	1150	1200	1000	900	1100	1100	1050	1350	1250	1750
Cloud base (m)	1650	400	8600	8200	7000		2400	1000	800	450	400	450	900	400	600	600	1400

	—	—	7:18	—	—	7:16	—	—	7:15	—	—	7:13	—	—	7:11	—	—
	5:22	—	—	5:23	—	—	5:24	—	—	5:27	—	—	5:29	—	—	5:30	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 3°C on Tue afternoon, min -1°C on Thu afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Fri afternoon. Freeze-thaw conditions (max 4°C on Sun night, min -2°C on Fri afternoon). Winds increasing (calm on Sat morning, near gales from the ESE by Mon morning).

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. 1 hour ago	9° C	Dry	Calm (0 kph at 338).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Clear	Moderate winds from the NNW (20 kph at 330).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	17° C	Dry	Calm (0 kph at 190).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	Moderate rain .	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	12° C	-	Light winds from the NW (13 kph at 320).	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	12° C	-	Light winds from the NNW (17 kph at 330).	16 km Low: few Mid: few
Snohomish 49 km NW 196m alt. 52 minutes ago	12° C	Dry	Calm (2 kph at 9).
Seattle 49 km WSW 100m alt. 3 hours ago	18° C	-	Wind obs. (6 kph from 173 degs) was rejected.
SHIP8947 54 km W 15m alt. 3 hours ago			Light winds from the NNW (13 kph at 330).	- 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.