– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Mon 08 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Mon 08 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A light covering of new snow mostly falling on Mon night will be washed away by heavy rain (total 128mm) on Wed afternoon. Freeze-thaw conditions (max 7°C on Tue night, min 0°C on Mon night). Winds decreasing (severe gales from the SW on Mon afternoon, calm by Tue morning).											Days 5–7 Weather Summary Moderate rain (total 19mm), heaviest on Sat night. Mild temperatures (max 7°C on Sat morning, min 2°C on Sat night). Winds increasing (light winds from the SSW on Fri night, strong winds from the SW by Sat night).
	Mon 8		Tuesday 9			Wednesday 10			Thursday 11			Friday 12			Saturday 13
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	mod. snow	some clouds	light rain	heavy rain	heavy rain	heavy rain	heavy rain	mod. rain	light rain	light rain	light rain	rain shwrs	rain shwrs	clear	light rain	mod. rain
km/h	WSW	W	WSW	SSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SW	SSW	SW	SW
See all weather maps
cm	—	9	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	13	10	—	1.7	18	23	26	31	6	1.3	0.9	2	2	0.8	—	0.2	8
max°C	6	6	3	3	7	6	6	7	4	3	6	5	5	4	7	7	4
min°C	6	0	1	3	5	6	6	5	3	3	4	5	4	4	6	4	2
chill°C	-1	-2	1	0	-1	0	0	-1	-2	-2	-1	-1	-1	-1	3	-1	-5

Freezing level (m)	2500	1550	1550	2050	2700	2650	2850	2450	2100	2000	2350	2250	2350	2600	2750	2400	1950
Cloud base (m)	400	400	850	2600	400	400	400	400	450	450	500	400	500	800	8850	6350	400

	—	—	7:41	—	—	7:43	—	—	7:43	—	—	7:45	—	—	7:46	—	—
	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Mon night will be washed away by heavy rain (total 128mm) on Wed afternoon. Freeze-thaw conditions (max 7°C on Tue night, min 0°C on Mon night). Winds decreasing (severe gales from the SW on Mon afternoon, calm by Tue morning).

Mount Si Weather (Days 3-6):

Moderate rain (total 19mm), heaviest on Sat night. Mild temperatures (max 7°C on Sat morning, min 2°C on Sat night). Winds increasing (light winds from the SSW on Fri night, strong winds from the SW by Sat 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. 1 hour ago	12° C	Light rain.	Calm (0 kph at 71).
Black Diamond 32 km SSW 192m alt. 1 hour ago	15° C	Dry	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	Light rain .	Moderate winds from the S (22 kph at 190).	14 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 2 hours ago	7° C	Dry	Calm (0 kph at 180).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7° C	-	Light winds from the N (7 kph at 1).	0.0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14° C	Light rain .	Moderate winds from the S (28 kph at 180).	11 km Low: broken Mid: broken High: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13° C	Light rain .	Fresh winds from the SSW (31 kph at 200).	11 km Low: broken Mid: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	12° C	Light rain.	Light winds from the SSW (11 kph at 213).
Seattle 49 km WSW 100m alt. 50 minutes ago	9° C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	13° C		Strong winds from the S (48 kph at 190).

* 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.