– Lat/Long: 47.51° N 121.74° W

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

Issued: 3 pm Thu 08 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of snow giving way to moderate rain (total 11mm) heaviest on Sat night. Freeze-thaw conditions (max 5°C on Fri night, min -2°C on Thu afternoon). Winds decreasing (strong winds from the WSW on Thu afternoon, light winds from the SW by Fri morning).											Days 5–7 Weather Summary Heavy rain (total 26mm), heaviest during Sun night. Very mild (max 10°C on Tue morning, min 3°C on Sun afternoon). Winds decreasing (strong winds from the SW on Sun night, calm by Tue morning).
	Thu 8		Friday 9			Saturday 10			Sunday 11			Monday 12			Tuesday 13
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	cloudy	some clouds	some clouds	cloudy	cloudy	light rain	light snow	light rain	light rain	heavy rain	mod. rain	light rain	rain shwrs	some clouds	clear	clear
km/h	WSW	WSW	SW	SW	SW	SSW	SSW	SW	SSW	SSW	SW	WSW	WSW	WSW	E	WSW	SSW
See all weather maps
cm	2	—	—	—	—	—	—	1	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	1.9	8	0.7	4	16	6	0.3	0.7	—	—	—
max °C	-2	-1	0	3	5	4	3	4	5	4	6	7	7	7	10	10	10
min °C	-2	-2	-1	2	4	4	2	1	4	3	4	6	7	6	8	10	8
chill °C	-10	-9	-6	-2	0	-1	-4	-5	-2	-3	-3	0	3	2	8	10	5

Freezing level m	900	1000	1050	1800	2250	2250	2000	1900	2400	2250	2500	2500	2700	3100	3150	3500	3650
Cloud base (m)	450	550	450	500		4000	3000	450	750	1700	450	450	450	450	550	450

	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:50	—	—	7:50	—	—
	4:34	—	—	4:35	—	—	4:36	—	—	4:37	—	—	4:38	—	—	4:39	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of snow giving way to moderate rain (total 11mm) heaviest on Sat night. Freeze-thaw conditions (max 5°C on Fri night, min -2°C on Thu afternoon). Winds decreasing (strong winds from the WSW on Thu afternoon, light winds from the SW by Fri morning).

Mount Si Weather (Days 3-6):

Heavy rain (total 26mm), heaviest during Sun night. Very mild (max 10°C on Tue morning, min 3°C on Sun afternoon). Winds decreasing (strong winds from the SW on Sun night, calm by Tue morning).

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	4° C	Dry	Calm (0 kph at 185).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (8 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Dry and cloudy.	Light winds from the S (19 kph at 180).	16 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 27 minutes ago	6° C	Dry	Calm (0 kph at 238).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-2° C	Light snow.	Light winds from the W.(Wind varies from 240 to 320 degs) (15 kph at 280).	1 km
SHIP8953 43 km W 15m alt. 2 hours ago				- km
SHIP9692 43 km W 15m alt. 3 hours ago				- km
SHIP3561 43 km W 15m alt. 3 hours ago				- km
SHIP7425 43 km W 15m alt. 42 minutes ago				- km
SHIP8283 43 km W 15m alt. 3 hours ago				- 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.