– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 3 am Sun 08 Nov Local Time

Updates in:

hr min s

Update imminent

Issued: 3 am Sun 08 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A dusting of snow. Milder later with heavy rain (total 27mm) on Mon afternoon. Very mild (max 10°C on Tue night, min 1°C on Sun afternoon). Mainly strong winds.									Days 4–6 Weather Summary Light rain (total 6mm), mostly falling on Fri night. Very mild (max 13°C on Wed morning, min 4°C on Fri night). Winds increasing (calm on Wed night, strong winds from the SW by Fri afternoon).
	Sunday 8			Monday 9			Tuesday 10			Wednesday 11			Thursday 12			Friday 13
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	snow shwrs	cloudy	cloudy	light rain	heavy rain	rain shwrs	light rain	mod. rain	rain shwrs	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	light rain	light rain	light rain
Cloud base (m)	650	750	6100	2050	1500	450	750	450	2800		7050	6500		6000	5550	1800	900	450
km/h	WSW	SW	SE	SSE	S	SW	SSW	S	SSW	S	SSE	SSE	SSW	SW	SSW	SSW	SW	SSW
See all weather maps
cm	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.8	—	—	0.1	11	2	4	5	4	—	—	—	—	—	—	0.1	0.9	5
max °C	2	2	5	5	4	4	5	6	10	13	13	13	10	8	7	7	6	6
min °C	2	1	2	3	4	2	4	6	7	11	13	9	9	7	6	6	6	4
chill °C	-5	-2	2	-1	-1	-4	-1	2	3	9	12	9	7	3	2	0	0	-2

Freezing level m	1450	1550	2000	1700	2200	1950	2300	2850	3050	3200	3250	3400	3100	2600	2650	2400	2300	2300

	7:01	—	—	7:03	—	—	7:03	—	—	7:05	—	—	7:07	—	—	7:09	—	—
	—	4:38	—	—	4:37	—	—	4:36	—	—	4:35	—	—	4:34	—	—	4:31	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of snow. Milder later with heavy rain (total 27mm) on Mon afternoon. Very mild (max 10°C on Tue night, min 1°C on Sun afternoon). Mainly strong winds.

Mount Si Weather (Days 3-6):

Light rain (total 6mm), mostly falling on Fri night. Very mild (max 13°C on Wed morning, min 4°C on Fri night). Winds increasing (calm on Wed night, strong winds from the SW by Fri 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. 37 minutes ago	11°C	Light rain.	Calm (0 kph at 329).
Maple Valley 29 km SSW 185.6m alt. 4 hours ago	11°C	Dry	Calm (0 kph at 138).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Dry and cloudy.	Moderate winds from the SSE (24 kph at 160).	16 km Low: broken Mid: broken High: overcast
Auburn 39 km SW 119m alt. 3 hours ago	1°C	-	Calm (0 kph at 227).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4°C	Clear	Wind obs. (7 kph from 1 degs) was rejected.	16 km
SHIP4398 43 km W 15m alt. 2 hours ago			Light winds from the S (13 kph at 190).	- km
SHIP9834 43 km W 15m alt. 3 hours ago			Light winds from the S (13 kph at 190).	- km
SHIP9124 43 km W 3m alt. 2 hours ago	12°C		Light winds from the SW (17 kph at 220).
SHIP3581 43 km W 15m alt. 3 hours ago			Light winds from the S (15 kph at 180).	- km
SHIP6899 43 km W 3m alt. 2 hours ago	13°C		Light winds from the SSW (15 kph at 200).

* 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.