– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Tue 06 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Tue 06 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A heavy fall of snow, heaviest during Wed morning. Freeze-thaw conditions (max 3°C on Fri afternoon, min -5°C on Wed night). Winds decreasing (strong winds from the WSW on Tue night, light winds from the SW by Fri morning).										Days 5–7 Weather Summary A dusting of snow on Sat night. Freezing level rising with drizzle on Sun night. Mild temperatures (max 7°C on Sat morning, min 1°C on Sat night). Winds decreasing (strong winds from the SW on Sat night, light winds from the SW by Mon afternoon).
		Wednesday 7			Thursday 8			Friday 9			Saturday 10			Sunday 11			Monday 12
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	light snow	mod. snow	light snow	light snow	cloudy	some clouds	some clouds	some clouds	cloudy	some clouds	light snow	light snow	light rain	light rain	some clouds	light rain	some clouds
km/h	WSW	SW	SW	WSW	WSW	W	WSW	WSW	SW	SW	S	SSW	SW	WSW	SSW	WSW	W	WSW	SW
See all weather maps
cm	4	5	3	6	2	2	—	—	—	—	—	—	1	1	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	0.1	0.9	—	0.6	—
max °C	-2	-4	-4	-4	-4	-2	-2	-1	3	5	7	6	4	2	3	5	6	6	6
min °C	-4	-4	-4	-5	-5	-3	-3	-1	1	3	6	5	1	2	2	3	5	6	5
chill °C	-13	-12	-12	-13	-13	-7	-8	-6	-2	-1	3	0	-6	-3	-3	-2	1	3	4

Freezing level m	750	750	700	600	500	850	950	1000	1650	2300	2550	2450	1500	1750	1800	2150	2400	2450	2900
Cloud base (m)	400	400	400	400	450	450	550	450	450	450		4450	2700	450	600	700	600	650	650

	—	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:50	—	—
	—	—	4:32	—	—	4:34	—	—	4:35	—	—	4:36	—	—	4:37	—	—	4:38	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Wed morning. Freeze-thaw conditions (max 3°C on Fri afternoon, min -5°C on Wed night). Winds decreasing (strong winds from the WSW on Tue night, light winds from the SW by Fri morning).

Mount Si Weather (Days 3-6):

A dusting of snow on Sat night. Freezing level rising with drizzle on Sun night. Mild temperatures (max 7°C on Sat morning, min 1°C on Sat night). Winds decreasing (strong winds from the SW on Sat night, light winds from the SW by Mon afternoon).

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	3° C	Dry	Calm (0 kph at 0).
Black Diamond 32 km SSW 192m alt. 2 hours ago	9° 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 S (11 kph at 170).	16 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 1 hour ago	-3° C	-	Calm (0 kph at 145).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-3° C	-	Light winds from the WSW (11 kph at 240).	0.0 km
SHIP8688 43 km W 15m alt. 3 hours ago			Light winds from the S (19 kph at 190).	- km
SHIP9453 43 km W 15m alt. 3 hours ago			Light winds from the S (19 kph at 190).	- km
SHIP3685 43 km W 15m alt. 3 hours ago			Light winds from the S (19 kph at 190).	- km
SHIP3222 43 km W 15m alt. 2 hours ago			Light winds from the S (10 kph at 190).	- km
SHIP3909 43 km W 15m alt. 3 hours ago			Light winds from the S (19 kph at 190).	- 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.