– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Fri 27 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Fri 27 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 5°C on Fri morning, min -7°C on Sun night). Winds increasing (calm on Fri afternoon, fresh winds from the NW by Sun night).									Days 4–6 Weather Summary A moderate fall of snow, heaviest on Wed morning. Freeze-thaw conditions (max 2°C on Tue afternoon, min -7°C on Mon morning). Mainly strong winds.
	Friday 27			Saturday 28			Sunday 29			Monday 30			Tuesday 31			Wednesday 1
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	cloudy	cloudy	some clouds	cloudy	some clouds	some clouds	light snow	heavy snow	some clouds	some clouds	some clouds	cloudy	cloudy	cloudy	mod. snow	mod. snow	snow shwrs
km/h	SE	SE	W	NW	WSW	SW	SW	W	NW	NW	NNW	NNE	SE	S	ESE	SE	SW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	1	14	—	—	—	—	—	—	7	7	5
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	5	5	4	1	1	0	-3	-2	-5	-6	-4	-4	-1	2	2	0	-1	-2
min °C	3	5	1	1	1	-3	-3	-2	-7	-7	-5	-4	-2	0	-2	-1	-2	-3
chill °C	0	4	-1	-2	-2	-9	-9	-7	-16	-12	-10	-7	-5	-3	-8	-7	-10	-11

Freezing level m	2150	2300	2050	1400	1400	750	1000	950	250	550	850	0	1200	1600	1100	1200	900	750
Cloud base (m)	7800	6100		2800	850	500	1600	650	600	500	800	650	2600	2600	850	400	400	450

	6:56	—	—	6:54	—	—	6:52	—	—	6:50	—	—	6:48	—	—	6:46	—	—
	—	7:29	—	—	7:30	—	—	7:31	—	—	7:32	—	—	7:34	—	—	7:36	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 5°C on Fri morning, min -7°C on Sun night). Winds increasing (calm on Fri afternoon, fresh winds from the NW by Sun night).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Wed morning. Freeze-thaw conditions (max 2°C on Tue afternoon, min -7°C on Mon morning). Mainly strong 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	2° C	-	Calm (0 kph at 344).
Renton 30 km WSW 160m alt. 34 minutes ago	1° C	-	Calm (0 kph at 48).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	1° C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	12° C	Dry	Calm (2 kph at 264).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-4° C	Clear	Light winds from the N (6 kph at 1).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	3° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	2° C	Dry and partly cloudy.	Light winds from the N (9 kph at 0).	16 km Low: scattered
Seattle 49 km WSW 100m alt. 2 hours ago		-	Calm (3 kph at 15).
SHIP9420 54 km W 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.