– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Thu 19 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Thu 19 Feb 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 Sat night, min -7°C on Thu night). Winds increasing (light winds from the W on Thu night, strong winds from the ESE by Sat night).										Days 5–7 Weather Summary A moderate fall of snow heaviest on Sun night. Turning milder with heavy rain (total 21mm), heaviest during Mon afternoon. Freeze-thaw conditions (max 4°C on Mon night, min -4°C on Tue night). Winds increasing (light winds from the SSE on Sun night, gales from the SW by Mon night).
		Friday 20			Saturday 21			Sunday 22			Monday 23			Tuesday 24			Wednesday 25
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

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

Freezing level m	0	600	800	700	1300	1300	1300	1500	1350	1250	1250	1800	2150	1000	1000	750	800	1000	800
Cloud base (m)	650	400	550		2450	2050	2400	1600	850	450	650	400	400	400	450	550	450	450	600

	—	7:03	—	—	7:01	—	—	6:58	—	—	6:58	—	—	6:56	—	—	6:54	—	—
	—	—	5:37	—	—	5:39	—	—	5:40	—	—	5:43	—	—	5:44	—	—	5:45	—

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 night). Winds increasing (light winds from the W on Thu night, strong winds from the ESE by Sat night).

Mount Si Weather (Days 3-6):

A moderate fall of snow heaviest on Sun night. Turning milder with heavy rain (total 21mm), heaviest during Mon afternoon. Freeze-thaw conditions (max 4°C on Mon night, min -4°C on Tue night). Winds increasing (light winds from the SSE on Sun night, gales from the SW 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. 54 minutes ago	-3° C	-	Calm (0 kph at 4).
Black Diamond 32 km SSW 192m alt. 24 minutes ago		-	Wind obs. (8 kph from 0 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	1° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Auburn 39 km SW 119m alt. 43 minutes ago	-4° C	-	Calm (0 kph at 134).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-7° C	Mist -.	Wind obs. (6 kph from 1 degs) was rejected.	8 km Low: broken Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	1° C	Dry and partly cloudy.	Light winds from the ENE (6 kph at 70).	16 km Low: scattered Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	1° C	Dry and partly cloudy.	Light winds from the NE (7 kph at 50).	16 km Low: broken
Snohomish 49 km NW 196m alt. 1 hour ago	-2° C	-	Wind obs. (6 kph from 19 degs) was rejected.
SHIP6283 54 km W 15m alt. 2 hours ago			Calm (6 kph at 80).	- km
SHIP4456 54 km W 15m alt. 2 hours ago			Calm (2 kph at 10).	- 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.