– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Mon 23 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Mon 23 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 17mm), heaviest on Tue afternoon giving way to a moderate fall of snow, heaviest on Wed afternoon. Freeze-thaw conditions (max 4°C on Mon morning, min -6°C on Wed night). Winds increasing (calm on Mon morning, gales from the SW by Tue afternoon).									Days 4–6 Weather Summary Mostly dry. Freeze-thaw conditions (max 9°C on Sat afternoon, min -6°C on Thu morning). Wind will be generally light.
	Monday 23			Tuesday 24			Wednesday 25			Thursday 26			Friday 27			Saturday 28
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	cloudy	cloudy	mod. rain	mod. rain	light snow	snow shwrs	light snow	snow shwrs	some clouds	some clouds	clear	clear	clear	some clouds	clear	clear	some clouds
km/h	SSW	SW	SW	SSW	SW	SW	SW	WSW	WSW	SW	NNW	ESE	ESE	ESE	ESE	SE	SE	S
See all weather maps
cm	—	—	—	—	—	2	3	5	3	—	—	—	—	—	—	—	—	—
mm	—	—	—	10	7	0.8	—	—	—	—	—	—	—	—	—	—	—	—
max °C	4	4	3	3	4	2	-3	-4	-4	-5	-1	0	2	5	6	8	9	9
min °C	3	3	0	2	4	-2	-3	-4	-6	-6	-2	-2	1	3	5	7	9	7
chill °C	3	0	-5	-5	-3	-10	-11	-13	-14	-13	-5	-2	-4	0	2	5	8	5

Freezing level m	2050	1900	1750	2400	2000	1150	850	750	450	750	1150	0	1650	2400	2800	2800	2750	2600
Cloud base (m)	6000		3000	400	450	400	500	450	550	500	1050	450	6900	6550	5600	4600	4700	5150

	7:03	—	—	7:01	—	—	7:00	—	—	6:58	—	—	6:56	—	—	6:54	—	—
	—	7:22	—	—	7:23	—	—	7:25	—	—	7:27	—	—	7:29	—	—	7:30	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 17mm), heaviest on Tue afternoon giving way to a moderate fall of snow, heaviest on Wed afternoon. Freeze-thaw conditions (max 4°C on Mon morning, min -6°C on Wed night). Winds increasing (calm on Mon morning, gales from the SW by Tue afternoon).

Mount Si Weather (Days 3-6):

Mostly dry. Freeze-thaw conditions (max 9°C on Sat afternoon, min -6°C on Thu morning). Wind will be generally light.

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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 51 minutes ago	3° C	Dry	Calm (0 kph at 13).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (6 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 3 hours ago	1° C	Clear	Light winds from the S (6 kph at 180).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	18° C	Dry	Calm (0 kph at 121).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	-1° C	Clear	Calm (0 kph at 0).	16 km
SHIP5635 43 km W 15m alt. 3 hours ago				- km
SHIP5281 43 km W 15m alt. 4 hours ago				- km
SHIP3214 43 km W 15m alt. 4 hours ago				- km
SHIP11733 43 km W 15m alt. 4 hours ago				- km
SHIP3525 43 km W 15m alt. 2 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.