– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Fri 27 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Fri 27 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Freeze-thaw conditions (max 6°C on Sat afternoon, min 0°C on Fri night). Wind will be generally light.										Days 5–7 Weather Summary Light rain (total 5mm) on Tue morning. Becoming colder with heavy fall of snow, heaviest during Wed afternoon. Freeze-thaw conditions (max 4°C on Mon night, min -3°C on Wed night). Winds increasing (light winds from the SW on Mon night, strong winds from the SW by Wed morning).
		Saturday 28			Sunday 1			Monday 2			Tuesday 3			Wednesday 4			Thursday 5
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	light rain	light snow	mod. snow	mod. snow	mod. snow	light snow	light snow	light snow	light snow
km/h	WSW	N	N	NNW	WNW	N	NNW	NW	NW	WSW	SSW	SW	SSW	SW	WSW	SW	WSW	WSW	NW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	4	9	6	7	4	3	2	3
mm	—	—	—	—	—	—	—	—	—	—	5	—	—	—	—	—	—	—	—
max °C	2	5	6	4	5	6	5	5	5	4	3	2	2	-1	0	-1	-2	-1	-2
min °C	0	5	5	3	5	5	3	4	5	3	2	2	0	-1	0	-3	-3	-2	-2
chill °C	-4	3	2	0	3	3	1	2	3	-1	-5	-4	-6	-9	-6	-11	-11	-9	-8

Freezing level m	1150	2550	2450	2350	2400	2300	2300	2100	2200	2150	1750	1550	1450	1200	1200	1100	900	1000	1000
Cloud base (m)	1000	8600		7850	8450			6950			900	500	400	400	400	450	450	450	450

	—	6:48	—	—	6:47	—	—	6:45	—	—	6:43	—	—	6:41	—	—	6:39	—	—
	—	—	5:50	—	—	5:52	—	—	5:52	—	—	5:54	—	—	5:55	—	—	5:58	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 6°C on Sat afternoon, min 0°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 5mm) on Tue morning. Becoming colder with heavy fall of snow, heaviest during Wed afternoon. Freeze-thaw conditions (max 4°C on Mon night, min -3°C on Wed night). Winds increasing (light winds from the SW on Mon night, strong winds from the SW by Wed morning).

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. 1 hour ago	3° C	Dry	Calm (0 kph at 340).
Black Diamond 32 km SSW 192m alt. 43 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Auburn 39 km SW 119m alt. 22 minutes ago	0° C	-	Calm (0 kph at 53).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-2° C	Moderate rain .	Light winds from the W (11 kph at 280).	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Snohomish 49 km NW 196m alt. 22 minutes ago	4° C	Dry	Calm (0 kph at 155).
SHIP4021 54 km W 3m alt. 3 hours ago	8° C		Calm (5 kph at 60).
SHIP2629 54 km W 3m alt. 3 hours ago	8° C		Calm (5 kph at 60).

* 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.