– Lat/Long: 47.51° N 121.74° W

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

Issued: 3 am Mon 08 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A dusting of snow. Milder later with heavy rain (total 124mm) on Wed afternoon. Freeze-thaw conditions (max 7°C on Mon morning, min 0°C on Mon night). Winds decreasing (stormy winds from the SW on Mon morning, calm by Tue morning).									Days 4–6 Weather Summary Heavy rain (total 27mm), heaviest during Thu afternoon. Later becoming colder with a dusting of snow on Sat night. Mild temperatures (max 7°C on Sat afternoon, min 1°C on Sat night). Mainly near gales.
	Monday 8			Tuesday 9			Wednesday 10			Thursday 11			Friday 12			Saturday 13
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	heavy rain	light snow	some clouds	light rain	heavy rain	heavy rain	heavy rain	heavy rain	mod. rain	mod. rain	light rain	rain shwrs	light rain	light rain	rain shwrs	rain shwrs	light snow
km/h	SW	WSW	W	WNW	SSW	WSW	WSW	W	WSW	WSW	WSW	WSW	WSW	WSW	SW	SSW	SW	SW
See all weather maps
cm	—	—	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1
mm	10	11	21	—	1.3	16	18	20	28	6	8	0.5	1.5	1.4	1.3	0.1	0.1	7
max°C	7	6	6	2	3	7	5	4	6	4	3	5	5	5	4	6	7	4
min°C	4	6	0	1	3	6	4	3	5	3	3	3	5	4	4	4	6	1
chill°C	-3	-1	-5	0	0	0	-2	-1	-1	-2	-2	-2	0	-2	-2	0	1	-6

Freezing level (m)	2100	2400	1900	1500	1950	2750	2400	2250	2600	2050	1850	2350	2250	2450	2650	2250	2400	1650
Cloud base (m)	900	400	400	700	1900	400	400	400	400	450	450	450	400	550	600	700	8100	400

	7:41	—	—	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 dusting of snow. Milder later with heavy rain (total 124mm) on Wed afternoon. Freeze-thaw conditions (max 7°C on Mon morning, min 0°C on Mon night). Winds decreasing (stormy winds from the SW on Mon morning, calm by Tue morning).

Mount Si Weather (Days 3-6):

Heavy rain (total 27mm), heaviest during Thu afternoon. Later becoming colder with a dusting of snow on Sat night. Mild temperatures (max 7°C on Sat afternoon, min 1°C on Sat night). Mainly near 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. 31 minutes ago	9° C	Dry	Calm (0 kph at 161).
Black Diamond 32 km SSW 192m alt. 32 minutes ago	4° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11° C	Dry and cloudy.	Light winds from the SSE (7 kph at 160).	16 km Low: few Mid: overcast
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (0 kph at 355).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Mist -.	Light winds from the N (9 kph at 1).	3 km Low: broken Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	11° C	Dry and cloudy.	Light winds from the SE (9 kph at 140).	16 km Low: broken Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	10° C	Dry and cloudy.	Light winds from the S (13 kph at 180).	16 km Low: scattered Mid: broken High: overcast
Snohomish 49 km NW 196m alt. 43 minutes ago	11° C	Dry	Light winds from the SSE (6 kph at 164).
Seattle 49 km WSW 100m alt. 1 hour ago	11° C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	11° C		Fresh winds from the S (30 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.