– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Tue 03 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Tue 03 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 12mm) on Tue afternoon. Becoming colder with heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 3°C on Tue morning, min -3°C on Wed night). Winds decreasing (strong winds from the SW on Tue afternoon, light winds from the NNW by Thu night).									Days 4–6 Weather Summary A dusting of snow. Milder later with heavy rain (total 22mm) on Sun afternoon. Freeze-thaw conditions (max 4°C on Sat morning, min -3°C on Sun night). Winds increasing (calm on Fri afternoon, strong winds from the SW by Sun afternoon).
	Tuesday 3			Wednesday 4			Thursday 5			Friday 6			Saturday 7			Sunday 8
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	mod. rain	mod. snow	light snow	light snow	mod. snow	light snow	cloudy	some clouds	some clouds	some clouds	light snow	light rain	light rain	light rain	mod. rain	mod. rain	light rain
km/h	SW	SW	SSW	WSW	W	WSW	SW	NW	NNW	NNW	WNW	WSW	WSW	W	SW	WSW	SW	SW
See all weather maps
cm	—	—	7	1	3	8	2	—	—	—	—	1	—	—	—	—	—	—
mm	5	7	0.4	—	—	—	—	—	—	—	—	0.7	0.3	0.2	4	5	10	1.2
max °C	3	2	2	1	1	0	-2	-2	-2	0	1	2	4	4	4	4	3	2
min °C	3	2	1	1	1	-3	-3	-2	-2	-1	0	1	3	4	3	3	3	-3
chill °C	-3	-5	-4	-5	-4	-10	-10	-6	-7	-4	-3	-3	0	1	-3	-3	-3	-9

Freezing level m	1850	1600	1500	1350	1400	950	750	950	1000	1100	1350	1550	2450	2300	2000	2250	1950	1100
Cloud base (m)	500	400	400	500	450	450	500	500	450	500	800	450	450	450	450	400	400	400

	6:43	—	—	6:41	—	—	6:39	—	—	6:37	—	—	6:35	—	—	7:33	—	—
	—	5:54	—	—	5:55	—	—	5:58	—	—	5:59	—	—	6:00	—	—	7:01	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 12mm) on Tue afternoon. Becoming colder with heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 3°C on Tue morning, min -3°C on Wed night). Winds decreasing (strong winds from the SW on Tue afternoon, light winds from the NNW by Thu night).

Mount Si Weather (Days 3-6):

A dusting of snow. Milder later with heavy rain (total 22mm) on Sun afternoon. Freeze-thaw conditions (max 4°C on Sat morning, min -3°C on Sun night). Winds increasing (calm on Fri afternoon, strong winds from the SW by Sun 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 79).
Black Diamond 32 km SSW 192m alt. 52 minutes ago		-	Wind obs. (11 kph from 236 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° 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		-	Calm (2 kph at 304).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Light rain .	Wind obs. (7 kph from 1 degs) was rejected.	14 km Low: broken Mid: broken High: overcast
SHIP4118 42 km WSW 15m alt. 3 hours ago			Light winds from the S (10 kph at 180).	- km
SHIP7751 42 km WSW 15m alt. 3 hours ago			Light winds from the S (10 kph at 180).	- km
SHIP2436 42 km WSW 15m alt. 3 hours ago			Light winds from the S (10 kph at 180).	- km
SHIP5510 42 km WSW 15m alt. 3 hours ago			Light winds from the S (10 kph at 180).	- km
SHIP3585 42 km WSW 15m alt. 2 hours ago			Light winds from the S (13 kph at 180).	- 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.