– Lat/Long: 47.51° N 121.74° W

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

Issued: 3 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 Tue afternoon. Temperatures will be below freezing (max -1°C on Tue afternoon, min -5°C on Wed night). Winds decreasing (near gales from the SW on Tue afternoon, light winds from the SW by Thu night).											Days 5–7 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 7°C on Sat morning, min 0°C on Fri afternoon). Winds increasing (calm on Fri afternoon, fresh winds from the SSW by Sat night).
	Tue 6		Wednesday 7			Thursday 8			Friday 9			Saturday 10			Sunday 11
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. snow	light snow	light snow	light snow	snow shwrs	light snow	light snow	cloudy	cloudy	some clouds	some clouds	some clouds	some clouds	light snow	cloudy	some clouds	rain shwrs
km/h	SW	WSW	SW	SW	SW	WSW	WSW	SW	WSW	S	SW	SSW	SSE	SSW	SW	SW	SW
See all weather maps
cm	6	4	5	2	7	2	1	—	—	—	—	—	—	2	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1
max °C	-1	-3	-4	-4	-5	-4	-3	-2	-1	2	5	7	7	3	1	1	3
min °C	-1	-4	-4	-4	-5	-5	-3	-3	-1	0	2	6	4	0	1	1	2
chill °C	-10	-13	-12	-12	-14	-13	-10	-7	-6	0	0	3	0	-7	-5	-4	-1

Freezing level m	1000	700	700	600	550	500	750	850	1000	1400	2350	2550	2550	1900	1400	1450	1900
Cloud base (m)	350	450	400	400	400	450	500	550	500	500	450	450	5050	1800	500	650	2550

	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—
	4:31	—	—	4:32	—	—	4:34	—	—	4:35	—	—	4:36	—	—	4:37	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Tue afternoon. Temperatures will be below freezing (max -1°C on Tue afternoon, min -5°C on Wed night). Winds decreasing (near gales from the SW on Tue afternoon, light winds from the SW by Thu night).

Mount Si Weather (Days 3-6):

A dusting of new snow. Freeze-thaw conditions (max 7°C on Sat morning, min 0°C on Fri afternoon). Winds increasing (calm on Fri afternoon, fresh winds from the SSW 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. 2 hours ago	4° C	Dry	Calm (0 kph at 74).
Black Diamond 32 km SSW 192m alt. 1 hour ago	13° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Dry and cloudy.	Light winds from the S (17 kph at 190).	16 km Low: broken Mid: broken High: overcast
Auburn 39 km SW 119m alt. 41 minutes ago	1° C	-	Calm (0 kph at 145).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-2° C	Heavy snow.	Wind obs. (6 kph from 1 degs) was rejected.	0 km
SHIP6047 43 km W 15m alt. 3 hours ago			Light winds from the S (17 kph at 190).	- km
SHIP5300 43 km W 15m alt. 2 hours ago			Light winds from the SW (15 kph at 220).	- km
SHIP6212 43 km W 15m alt. 3 hours ago			Light winds from the S (17 kph at 190).	- km
SHIP5417 43 km W 15m alt. 2 hours ago			Light winds from the WSW (13 kph at 240).	- km
SHIP9707 43 km W 15m alt. 3 hours ago			Light winds from the S (17 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.