– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Mon 24 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Mon 24 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A light fall of snow, heaviest on Tue afternoon. Turning milder with light rain (total 3mm) on Wed night. Freeze-thaw conditions (max 5°C on Wed night, min -2°C on Mon morning). Wind will be generally light.									Days 4–6 Weather Summary Mild with light rain (total 7mm) on Thu afternoon Becoming colder with a light covering of snow, mostly falling on Thu night. Freeze-thaw conditions (max 5°C on Thu morning, min -3°C on Sat night). Winds decreasing (near gales from the SW on Thu night, calm by Fri night).
	Monday 24			Tuesday 25			Wednesday 26			Thursday 27			Friday 28			Saturday 29
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	light snow	some clouds	light snow	mod. snow	light snow	light rain	light rain	rain shwrs	rain shwrs	mod. rain	snow shwrs	cloudy	light snow	light snow	light snow	cloudy	clear
km/h	WSW	SW	SSW	SSE	SSW	SW	SW	SSE	SSW	S	S	SW	SW	SW	WSW	ENE	ENE	E
See all weather maps
cm	—	1	—	1	7	2	—	—	—	—	—	2	—	2	3	1	—	—
mm	—	—	—	—	—	0.2	0.2	0.6	2	0.7	6	—	—	—	—	—	—	—
max°C	-2	-2	0	0	1	3	4	4	5	5	3	1	0	0	-1	-1	-2	-2
min°C	-2	-2	-2	-1	0	1	3	2	4	4	2	0	0	0	-1	-2	-2	-3
chill°C	-8	-7	-5	-6	-5	-4	0	-3	0	0	-6	-8	-6	-3	-1	-6	-6	-7

Freezing level (m)	1000	950	850	1350	1300	1750	2100	2000	2250	2100	1850	1250	1300	1250	1100	1050	850	450
Cloud base (m)	550	550	600	2500	700	450	550	650	550	700	700	450	600	450	400	400	450	400

	7:24	—	—	7:26	—	—	7:26	—	—	7:28	—	—	7:30	—	—	7:31	—	—
	—	4:22	—	—	4:21	—	—	4:20	—	—	4:20	—	—	4:19	—	—	4:17	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light fall of snow, heaviest on Tue afternoon. Turning milder with light rain (total 3mm) on Wed night. Freeze-thaw conditions (max 5°C on Wed night, min -2°C on Mon morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mild with light rain (total 7mm) on Thu afternoon Becoming colder with a light covering of snow, mostly falling on Thu night. Freeze-thaw conditions (max 5°C on Thu morning, min -3°C on Sat night). Winds decreasing (near gales from the SW on Thu night, calm by Fri 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	3° C	Dry	Calm (0 kph at 198).
Black Diamond 32 km SSW 192m alt. 1 hour ago	7° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Light winds from the ESE (7 kph at 120).	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	4° C	Dry	Calm (0 kph at 259).
Stampede Pass Airport 40 km SE 628m alt. 44 minutes ago	-2° C	Light snow.	Wind obs. (11 kph from 1 degs) was rejected.	1 km
SHIP4164 42 km WSW 15m alt. 3 hours ago			Light winds from the SSE (10 kph at 150).	- km
SHIP2796 42 km WSW 15m alt. 2 hours ago				- km
SHIP2768 42 km WSW 15m alt. 2 hours ago			Light winds from the SSE (8 kph at 160).	- km
SHIP8889 42 km WSW 3m alt. 2 hours ago	6° C		Light winds from the SE (8 kph at 140).
SHIP6852 42 km WSW 15m alt. 3 hours ago			Light winds from the SSE (10 kph at 150).	- 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.