– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Fri 09 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Fri 09 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 7°C on Mon afternoon, min 0°C on Sat morning). Wind will be generally light.										Days 5–7 Weather Summary Light rain (total 10mm), mostly falling on Wed night. Very mild (max 12°C on Thu afternoon, min 5°C on Wed night). Winds increasing (calm on Mon night, strong winds from the WSW by Wed morning).
		Saturday 10			Sunday 11			Monday 12			Tuesday 13			Wednesday 14
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	snow shwrs	some clouds	clear	clear	clear	clear	clear	clear	some clouds	cloudy	some clouds	some clouds	light rain	light rain	rain shwrs
Cloud base (m)	400	450	500							3050	2400	2000		550	450	950
km/h	WSW	NW	NNE	NE	ESE	NNW	NE	SSW	WSW	W	WSW	WNW	SW	WSW	WSW	NNW
See all weather maps
cm	1	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	1.3	3	5
max °C	2	1	2	3	4	5	5	5	7	7	8	9	7	8	7	6
min °C	1	0	1	2	3	5	4	4	6	6	7	8	6	6	7	5
chill °C	-3	0	1	0	3	5	4	4	6	6	7	8	5	1	2	3

Freezing level m	1450	1350	1500	1800	1950	2150	2550	3200	3300	3150	3000	3050	3100	2850	2700	3550

	—	7:16	—	—	7:18	—	—	7:20	—	—	7:22	—	—	7:22	—	—
	—	—	6:29	—	—	6:27	—	—	6:24	—	—	6:22	—	—	6:21	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 7°C on Mon afternoon, min 0°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 10mm), mostly falling on Wed night. Very mild (max 12°C on Thu afternoon, min 5°C on Wed night). Winds increasing (calm on Mon night, strong winds from the WSW by Wed 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Renton Airport 36 km WSW 218m alt. 2 hours ago	11°C	Dry and cloudy.	Light winds from the SSE (6 kph at 160).	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	9°C	Dry	Calm (0 kph at 207).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	1°C	Light rain .	Wind obs. (9 kph from 1 degs) was rejected.	11 km Low: broken Mid: broken High: overcast
SHIP6294 42 km WSW 3m alt. 3 hours ago	1°C		Calm (5 kph at 110).
SHIP10709 42 km WSW 15m alt. 4 hours ago			Light winds from the ESE (8 kph at 120).	- km
SHIP5195 42 km WSW 3m alt. 2 hours ago	1°C		Light winds from the ESE (9 kph at 120).
SHIP11135 42 km WSW 15m alt. 5 hours ago			Light winds from the SE (10 kph at 130).	- km
SHIP7708 42 km WSW 3m alt. 1 hour ago	2°C		Light winds from the SSE (13 kph at 160).
SHIP5734 42 km WSW 15m alt. 2 hours ago			Light winds from the ESE (10 kph at 120).	- km
SHIP7292 42 km WSW 15m alt. 3 hours ago			Calm (6 kph at 110).	- 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.