– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Thu 12 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Thu 12 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A light covering of new snow mostly falling on Fri afternoon. Freeze-thaw conditions (max 1°C on Thu night, min -3°C on Fri night). Winds decreasing (strong winds from the SW on Fri night, calm by Sat night).										Days 5–7 Weather Summary A moderate fall of snow, heaviest on Mon night. Freeze-thaw conditions (max 1°C on Sun night, min -5°C on Tue night). Mainly fresh winds.
		Friday 13			Saturday 14			Sunday 15			Monday 16			Tuesday 17			Wednesday 18
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	light snow	light snow	cloudy	some clouds	cloudy	cloudy	cloudy	some clouds	cloudy	cloudy	heavy snow	snow shwrs	some clouds	light snow	light snow	snow shwrs	light snow
km/h	SW	SW	SSE	SW	SW	ENE	NE	S	WSW	SE	ESE	ESE	SW	SW	NNW	NW	NW	WSW	WSW
See all weather maps
cm	—	—	2	5	—	—	—	—	—	—	—	—	13	1	—	3	1	1	5
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	1	0	0	0	-3	-2	-2	-1	0	1	1	1	-1	-3	-2	-3	-4	-3	-4
min °C	0	0	0	-3	-3	-2	-2	-2	-1	0	0	1	-4	-3	-3	-5	-4	-4	-5
chill °C	-6	-6	-3	-10	-8	-2	-2	-2	-1	-4	-5	-3	-12	-7	-6	-11	-9	-12	-13

Freezing level m	1350	1300	1250	1000	850	1000	800	950	1200	1350	1400	1350	1000	800	950	700	650	800	600
Cloud base (m)	2100	700	600	400	450	600	1950	1500	550	450	750	500	350	350	450	400	400	500	400

	—	7:15	—	—	7:13	—	—	7:11	—	—	7:09	—	—	7:07	—	—	7:05	—	—
	—	—	5:27	—	—	5:29	—	—	5:30	—	—	5:31	—	—	5:32	—	—	5:35	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Fri afternoon. Freeze-thaw conditions (max 1°C on Thu night, min -3°C on Fri night). Winds decreasing (strong winds from the SW on Fri night, calm by Sat night).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Mon night. Freeze-thaw conditions (max 1°C on Sun night, min -5°C on Tue night). Mainly fresh winds.

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. 2 hours ago	6° C	Dry	Calm (0 kph at 48).
Renton Airport 36 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Light winds from the S (9 kph at 170).	16 km Low: scattered Mid: broken High: overcast
Auburn 39 km SW 119m alt. 1 hour ago	7° C	Dry	Calm (0 kph at 191).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-1° C	Moderate rain .	Calm (0 kph at 0).	16 km Low: few
SHIP9324 43 km W 15m alt. 3 hours ago				- km
SHIP4243 43 km W 15m alt. 3 hours ago				- km
SHIP8688 43 km W 15m alt. 3 hours ago				- km
SHIP7956 43 km W 3m alt. 3 hours ago
SHIP3162 43 km W 15m alt. 2 hours ago				- km
SHIP5400 43 km W 3m alt. 2 hours ago

* 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.