– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Wed 18 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Wed 18 Feb 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. Temperatures will be below freezing (max -1°C on Fri night, min -7°C on Thu afternoon). Wind will be generally light.									Days 4–6 Weather Summary Mild with light rain (total 3mm) on Sun night Becoming colder with a light covering of snow, mostly falling on Mon night. Freeze-thaw conditions (max 4°C on Sun night, min -2°C on Mon night). Mainly near gales.
	Wednesday 18			Thursday 19			Friday 20			Saturday 21			Sunday 22			Monday 23
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	snow shwrs	light snow	cloudy	cloudy	some clouds	some clouds	cloudy	cloudy	cloudy	clear	some clouds	some clouds	some clouds	cloudy	light rain	snow shwrs	some clouds	mod. snow
km/h	SW	SW	ENE	SE	WNW	SW	WSW	SW	ESE	ESE	ESE	ESE	ESE	ESE	SE	SSE	SW	SW
See all weather maps
cm	1	1	—	—	—	—	—	—	—	—	—	—	—	—	—	2	—	6
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2	0.5	—	—
max °C	-5	-5	-4	-6	-7	-7	-5	-5	-1	0	0	1	2	2	4	4	0	0
min °C	-6	-5	-6	-6	-7	-7	-6	-5	-4	-1	0	0	2	2	1	0	-1	-2
chill °C	-13	-9	-6	-6	-10	-10	-10	-10	-7	-7	-7	-8	-4	-4	-4	-8	-9	-11

Freezing level m	500	650	300	400	400	0	500	700	400	1200	1300	1450	1600	1550	1600	2000	1200	850
Cloud base (m)	400	450	1850	400	400	1550	400	500	500	650	3000		2250	2250	1900	850	550	800

	7:05	—	—	7:05	—	—	7:03	—	—	7:01	—	—	6:58	—	—	6:58	—	—
	—	5:35	—	—	5:36	—	—	5:37	—	—	5:39	—	—	5:40	—	—	5:43	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Temperatures will be below freezing (max -1°C on Fri night, min -7°C on Thu afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mild with light rain (total 3mm) on Sun night Becoming colder with a light covering of snow, mostly falling on Mon night. Freeze-thaw conditions (max 4°C on Sun night, min -2°C on Mon night). Mainly near gales.

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. 49 minutes ago	2° C	-	Calm (0 kph at 339).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Light winds from the SW (6 kph at 223).
Renton Airport 36 km WSW 218m alt. 2 hours ago	5° C	Light rain .	Light winds from the S (7 kph at 180).	16 km Low: scattered Mid: broken
Auburn 39 km SW 119m alt. 59 minutes ago	15° C	Dry	Calm (3 kph at 325).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-3° C	Moderate rain .	Wind obs. (7 kph from 1 degs) was rejected.	14 km Low: few Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	6° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and partly cloudy.	Light winds from the SSE (9 kph at 160).	16 km Low: few Mid: broken High: broken
Snohomish 49 km NW 196m alt. 57 minutes ago	3° C	Dry	Calm (3 kph at 58).
Seattle 49 km WSW 100m alt. 2 hours ago		-	Wind obs. (21 kph from 160 degs) was rejected.
SHIP8019 50 km WSW 15m alt. 2 hours ago				- 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.