– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Wed 01 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Wed 01 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 3mm), mostly falling on Fri night. Freeze-thaw conditions (max 10°C on Fri afternoon, min -1°C on Wed morning). Winds increasing (calm on Wed night, fresh winds from the ESE by Fri night).									Days 4–6 Weather Summary A heavy fall of snow, heaviest during Sat afternoon. Freeze-thaw conditions (max 3°C on Sat morning, min -2°C on Mon morning). Winds increasing (calm on Sat afternoon, strong winds from the WSW by Sun night).
	Wednesday 1			Thursday 2			Friday 3			Saturday 4			Sunday 5			Monday 6
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	clear	rain shwrs	clear	cloudy	cloudy	light rain	light snow	light snow	light snow	light snow	light snow	light snow	light snow	light snow	mod. snow
km/h	W	W	N	ESE	NW	SW	SE	SE	ESE	NNW	SSW	SW	SW	SW	WSW	SW	N	W
Wave Height Map See all maps
cm	—	—	—	—	—	—	—	—	—	1.0	5	2.0	2.0	4	3	2.0	3	6
mm	—	—	—	—	0.1	—	—	—	3	0.4	—	—	—	—	—	—	—	—
max°C	0	2	1	3	6	6	8	10	5	3	0	0	2	2	0	-1	-1	-1
min°C	-1	2	0	2	5	5	6	7	4	1	-1	-1	1	2	-1	-2	-2	-2
chill°C	-3	-1	-2	0	3	5	3	3	-1	1	-5	-5	-3	-4	-9	-9	-8	-6

Freezing level (m)	1250	1450	1300	1700	2050	2100	2300	2200	2100	1600	1050	1150	1600	1550	1300	1050	1000	950
Cloud base (m)	800	1750	1500		3100	9200	6050	2500	450	350	400	400	400	400	400	400	450	500

	5:48	—	—	5:47	—	—	5:45	—	—	5:43	—	—	5:41	—	—	5:41	—	—
	—	—	8:19	—	—	8:21	—	—	8:22	—	—	8:22	—	—	8:24	—	—	8:25

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 3mm), mostly falling on Fri night. Freeze-thaw conditions (max 10°C on Fri afternoon, min -1°C on Wed morning). Winds increasing (calm on Wed night, fresh winds from the ESE by Fri night).

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Sat afternoon. Freeze-thaw conditions (max 3°C on Sat morning, min -2°C on Mon morning). Winds increasing (calm on Sat afternoon, strong winds from the WSW by Sun 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
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	9° C	-	Calm (0 kph at 287).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	-	Light winds from the S (11 kph at 170).	16 km Low: few
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 244).
Grotto wx 39 km NE 1101m alt. 2 hours ago	4° C	Dry	Calm (0 kph at 131).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2° C	Dry and partly cloudy.	Light winds from the N (7 kph at 1).	16 km Low: scattered Mid: scattered High: broken

* 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.