– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Wed 03 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Wed 03 Dec 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 Thu morning. Turning milder with heavy rain (total 30mm), heaviest during Fri morning. Freeze-thaw conditions (max 5°C on Fri morning, min -1°C on Wed afternoon). Winds increasing (light winds from the WNW on Wed night, gales from the WSW by Fri night).									Days 4–6 Weather Summary Heavy rain (total 49mm), mostly on Sun afternoon. Becoming colder with a light covering of snow, mostly falling on Mon night. Freeze-thaw conditions (max 5°C on Mon afternoon, min 0°C on Sat morning). Mainly severe gales.
	Wednesday 3			Thursday 4			Friday 5			Saturday 6			Sunday 7			Monday 8
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	cloudy	light snow	light snow	heavy rain	mod. rain	light snow	light snow	light snow	light snow	light snow	mod. rain	rain shwrs	rain shwrs	light rain	heavy rain	light snow
km/h	NNW	NNW	WNW	WSW	WSW	WSW	WSW	WSW	SW	WSW	WSW	WSW	SSW	WSW	SW	SW	SW	WSW
See all weather maps
cm	—	—	—	3	3	—	—	1	4	2	2	2	—	—	—	—	—	3
mm	—	—	—	—	—	17	10	4	—	—	—	—	10	12	0.7	1.6	12	13
max°C	0	0	1	0	2	4	5	3	2	1	2	2	4	4	3	4	5	5
min°C	0	-1	0	0	1	2	3	2	1	0	1	2	3	3	2	4	5	0
chill°C	-3	-4	-4	-5	-4	-4	-4	-6	-8	-8	-7	-4	-3	-4	-5	-2	-3	-7

Freezing level (m)	1250	1150	1500	1350	1500	1850	2000	1650	1550	1350	1500	1550	1950	2000	1500	1900	2150	2050
Cloud base (m)	2100	600	450	450	400	400	400	400	400	400	400	400	400	400	750	1650	500	400

	7:35	—	—	7:37	—	—	7:37	—	—	7:39	—	—	7:39	—	—	7:41	—	—
	—	4:16	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow heaviest on Thu morning. Turning milder with heavy rain (total 30mm), heaviest during Fri morning. Freeze-thaw conditions (max 5°C on Fri morning, min -1°C on Wed afternoon). Winds increasing (light winds from the WNW on Wed night, gales from the WSW by Fri night).

Mount Si Weather (Days 3-6):

Heavy rain (total 49mm), mostly on Sun afternoon. Becoming colder with a light covering of snow, mostly falling on Mon night. Freeze-thaw conditions (max 5°C on Mon afternoon, min 0°C on Sat morning). Mainly severe gales.

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. 1 hour ago	6° C	Dry	Calm (0 kph at 257).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (5 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	7° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Auburn 39 km SW 119m alt. 2 hours ago	11° C	Dry	Calm (0 kph at 135).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-2° C	Fog freezing -.	Light winds from the WSW (6 kph at 250).	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	7° C	Dry and partly cloudy.	Wind obs. (11 kph from 180 degs) was rejected.	16 km Low: scattered Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	6° C	Dry and cloudy.	Light winds from the SSE (6 kph at 160).	16 km Low: overcast
Snohomish 49 km NW 196m alt. 54 minutes ago	5° C	Dry	Calm (0 kph at 31).
Seattle 49 km WSW 100m alt. 49 minutes ago	8° C	-	Wind obs. (8 kph from 168 degs) was rejected.
SHIP3630 51 km W 15m alt. 3 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.