– Lat/Long: 47.51° N 121.74° W

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

Issued: 9 am Fri 27 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Freeze-thaw conditions (max 6°C on Sat afternoon, min -1°C on Fri morning). Wind will be generally light.									Days 4–6 Weather Summary Mild at first with light rain (total 3mm) on Tue afternoon followed by colder weather and light fall of snow, heaviest on Tue night. Freeze-thaw conditions (max 5°C on Mon morning, min -2°C on Wed night). Winds increasing (calm on Mon night, fresh winds from the SW by Tue afternoon).
	Friday 27			Saturday 28			Sunday 1			Monday 2			Tuesday 3			Wednesday 4
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	clear	clear	some clouds	some clouds	clear	clear	clear	clear	clear	some clouds	cloudy	light snow	mod. snow	light snow	light snow	light snow
km/h	SW	WSW	WSW	NNW	N	NNW	SW	NNW	NNW	NW	NNW	NW	SW	WSW	SSW	SW	WSW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	2	7	2	4	2
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	3	—	—	—	—
max °C	-1	0	1	5	6	4	5	5	4	5	5	5	5	2	1	0	0	-1
min °C	-1	0	-1	4	5	3	5	4	3	4	4	4	3	1	0	0	0	-2
chill °C	-6	-5	-4	2	3	3	3	1	0	1	3	4	-1	-6	-6	-7	-6	-10

Freezing level m	1100	1350	1050	2350	2450	2400	2400	2300	2200	2100	2100	2250	2200	1650	1500	1250	1300	1100
Cloud base (m)	650	750	1500	550			8100				7700	8100	5900	700	400	400	400	450

	6:50	—	—	6:48	—	—	6:47	—	—	6:45	—	—	6:43	—	—	6:41	—	—
	—	5:49	—	—	5:50	—	—	5:52	—	—	5:52	—	—	5:54	—	—	5:55	—

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 -1°C on Fri morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mild at first with light rain (total 3mm) on Tue afternoon followed by colder weather and light fall of snow, heaviest on Tue night. Freeze-thaw conditions (max 5°C on Mon morning, min -2°C on Wed night). Winds increasing (calm on Mon night, fresh winds from the SW by Tue afternoon).

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. 39 minutes ago	8° C	Dry	Calm (0 kph at 29).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 335).
Renton Airport 36 km WSW 218m alt. 2 hours ago	10° C	Dry and cloudy.	Light winds from the SSW (17 kph at 200).	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	23° C	Dry	Wind obs. (6 kph from 35 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	0° C	Moderate rain .	Light winds from the N (7 kph at 1).	16 km Low: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Light winds from the SSW (13 kph at 200).	16 km Low: broken Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 1 hour ago	9° C	Dry and partly cloudy.	Moderate winds from the SW (20 kph at 220).	16 km Low: scattered Mid: broken
Snohomish 49 km NW 196m alt. 39 minutes ago	9° C	Dry	Light winds from the S (16 kph at 173).
SHIP7488 54 km W 3m alt. 3 hours ago	9° C		Light winds from the S (15 kph at 180).
SHIP549 54 km W -m alt. 2 hours ago	10° C	-	Light winds from the S (11 kph at 180).

* 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.