– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sun 05 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Sun 05 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Some drizzle, heaviest during Mon afternoon. Freeze-thaw conditions (max 14°C on Sun afternoon, min -4°C on Mon night). Winds decreasing (fresh winds from the SW on Mon night, calm by Wed morning).											Days 5–7 Weather Summary Mostly dry. Freeze-thaw conditions (max 7°C on Fri morning, min 0°C on Sat morning). Wind will be generally light.
	Sun 5		Monday 6			Tuesday 7			Wednesday 8			Thursday 9			Friday 10
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	rain shwrs	clear	risk tstorm	rain shwrs	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear
km/h	SE	SSW	SW	WSW	SW	WNW	NW	N	N	WNW	NNW	E	NNW	ESE	S	W	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	0.5	—	1	0.1	—	—	—	—	—	—	—	—	—	—	—	—
max °C	14	13	10	10	6	-3	1	0	0	3	2	2	5	5	7	7	6
min °C	13	10	10	9	-4	-4	-1	-1	-1	2	1	1	4	5	6	7	2
chill °C	12	9	8	6	-10	-9	-4	-3	-3	1	-2	1	4	5	6	7	-3

Freezing level m	3050	3000	2800	2650	1200	900	1350	1000	1250	1700	1500	1650	2050	2450	2500	2550	2350
Cloud base (m)	6500	6150	8350	1600	500	450	700	1550	700	900	900				7900		8050

	—	—	6:35	—	—	6:33	—	—	6:31	—	—	6:30	—	—	6:28	—	—
	7:40	—	—	7:43	—	—	7:44	—	—	7:45	—	—	7:46	—	—	7:49	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Mon afternoon. Freeze-thaw conditions (max 14°C on Sun afternoon, min -4°C on Mon night). Winds decreasing (fresh winds from the SW on Mon night, calm by Wed morning).

Mount Si Weather (Days 3-6):

Mostly dry. Freeze-thaw conditions (max 7°C on Fri morning, min 0°C on Sat 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. 56 minutes ago	14° C	Dry	Calm (0 kph at 322).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	6° C	-	Calm (0 kph at 3).
Renton 30 km WSW 160m alt. 2 hours ago	18° C	Dry	Calm (3 kph at 284).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (6 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	18° C	Dry	Calm (2 kph at 119).
Renton Airport 36 km WSW 218m alt. 3 hours ago	19° C	Clear	Light winds from the NW (17 kph at 310).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	7° C	Dry	Calm (2 kph at 346).
Auburn 39 km SW 119m alt. 1 hour ago	16° C	Dry	Calm (0 kph at 190).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	11° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	15° C	Dry	Calm (2 kph at 191).

* 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.