– Lat/Long: 47.51° N 121.74° W

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

Issued: 3 am Thu 19 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. Freeze-thaw conditions (max 2°C on Sat night, min -7°C on Thu afternoon). Winds increasing (calm on Thu morning, near gales from the ESE by Sat night).									Days 4–6 Weather Summary A moderate fall of snow, heaviest on Tue morning. Freeze-thaw conditions (max 1°C on Sun morning, min -4°C on Tue night). Winds decreasing (strong winds from the SW on Sun night, calm by Mon night).
	Thursday 19			Friday 20			Saturday 21			Sunday 22			Monday 23			Tuesday 24
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

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

Freezing level m	150	300	0	450	700	400	1000	1000	1500	1550	1250	1150	1200	1200	1000	850	850	700
Cloud base (m)	450	400	850	400	500	400	2550	700	2300	1500	1650	450	600	400	400	400	450	450

	7:05	—	—	7:03	—	—	7:01	—	—	6:58	—	—	6:58	—	—	6:56	—	—
	—	5:36	—	—	5:37	—	—	5:39	—	—	5:40	—	—	5:43	—	—	5:44	—

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 Sat night, min -7°C on Thu afternoon). Winds increasing (calm on Thu morning, near gales from the ESE by Sat night).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Tue morning. Freeze-thaw conditions (max 1°C on Sun morning, min -4°C on Tue night). Winds decreasing (strong winds from the SW on Sun night, calm 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	-1° C	-	Calm (0 kph at 347).
Black Diamond 32 km SSW 192m alt. 57 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	2° C	Dry and partly cloudy.	Light winds from the N (11 kph at 350).	16 km Low: broken
Auburn 39 km SW 119m alt. 1 hour ago	1° C	-	Calm (0 kph at 58).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-5° C	Mist -.	Calm (0 kph at 0).	6 km Low: broken Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	2° C	Dry and partly cloudy.	Light winds from the N (6 kph at 1).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	1° C	Dry and partly cloudy.	Light winds from the N (13 kph at 10).	11 km Low: scattered Mid: broken High: broken
SHIP4698 48 km SW 15m alt. 3 hours ago				- km
SHIP7057 48 km SW 3m alt. 3 hours ago	4° C
SHIP10428 48 km SW 15m alt. 3 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.