– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Sat 06 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Sat 06 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mild with heavy rain (total 41mm), heaviest during Mon night. Becoming colder with a moderate fall of snow heaviest on Mon night. Freeze-thaw conditions (max 6°C on Mon afternoon, min -1°C on Mon night). Winds decreasing (severe gales from the SW on Mon afternoon, light winds from the WSW by Tue morning).											Days 5–7 Weather Summary Light rain (total 9mm) at first, then becoming colder with a dusting of snow on Wed morning. Freeze-thaw conditions (max 6°C on Fri morning, min -1°C on Tue afternoon). Mainly gales.
	Sat 6		Sunday 7			Monday 8			Tuesday 9			Wednesday 10			Thursday 11
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	light snow	rain shwrs	light rain	mod. rain	heavy rain	light snow	light snow	cloudy	mod. rain	light snow	light snow	cloudy	some clouds	some clouds	light rain
km/h	WSW	WSW	S	WSW	WSW	SW	WSW	W	SW	SW	WSW	WSW	SW	SW	SW	WSW	SW
See all weather maps
cm	1	2	2	—	—	—	—	5	1	—	—	2	1	—	—	—	—
mm	—	—	6	5	1.9	10	10	8	—	—	7	—	—	—	—	—	1
max°C	1	2	3	3	2	5	6	5	-1	0	4	2	0	0	1	2	5
min°C	1	1	1	3	2	3	6	-1	-1	-1	1	1	0	0	1	2	3
chill°C	-7	-5	-3	-4	-5	-3	-1	-8	-6	-4	-6	-5	-7	-5	-3	-1	0

Freezing level (m)	1400	1450	1500	1750	1600	1850	2400	1350	1150	1100	2100	1550	1350	1250	1450	1700	2250
Cloud base (m)	450	600	400	450	500	650	400	450	400	750	400	400	450		2450	2000	600

	—	—	7:39	—	—	7:41	—	—	7:41	—	—	7:43	—	—	7:43	—	—
	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: Mild with heavy rain (total 41mm), heaviest during Mon night. Becoming colder with a moderate fall of snow heaviest on Mon night. Freeze-thaw conditions (max 6°C on Mon afternoon, min -1°C on Mon night). Winds decreasing (severe gales from the SW on Mon afternoon, light winds from the WSW by Tue morning).

Mount Si Weather (Days 3-6):

Light rain (total 9mm) at first, then becoming colder with a dusting of snow on Wed morning. Freeze-thaw conditions (max 6°C on Fri morning, min -1°C on Tue afternoon). Mainly 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. 2 hours ago	8° C	Dry	Calm (0 kph at 208).
Black Diamond 32 km SSW 192m alt. 2 hours ago	11° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11° C	Dry and partly cloudy.	Light winds from the S (17 kph at 170).	16 km Low: broken
Auburn 39 km SW 119m alt. 59 minutes ago	3° C	Dry	Calm (0 kph at 201).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	2° C	-	Light winds from the W.(Wind varies from 200 to 340 degs) (13 kph at 280).	0.0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	11° C	Dry and partly cloudy.	Light winds from the SSW (11 kph at 200).	16 km Low: scattered Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	9° C	Dry and partly cloudy.	Light winds from the S (19 kph at 190).	16 km Low: few Mid: scattered High: broken
Snohomish 49 km NW 196m alt. 1 hour ago	8° C	Dry	Wind obs. (8 kph from 194 degs) was rejected.
Seattle 49 km WSW 100m alt. 56 minutes ago	11° C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	11° C		Calm (5 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.