– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 3 pm Tue 10 Nov Local Time

Updates in:

hr min s

Update imminent

Issued: 3 pm Tue 10 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Moderate rain (total 14mm), heaviest on Tue afternoon. Very mild (max 17°C on Wed morning, min 10°C on Tue afternoon). Winds increasing (calm on Wed night, fresh winds from the SE by Fri morning).											Days 5–7 Weather Summary Heavy rain (total 37mm), heaviest during Sun morning. Very mild (max 12°C on Fri afternoon, min 7°C on Sat afternoon). Wind will be generally light.
	Tue 10		Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	rain shwrs	some clouds	some clouds	some clouds	some clouds	some clouds	cloudy	cloudy	light rain	rain shwrs	rain shwrs	rain shwrs	rain shwrs	heavy rain	light rain	mod. rain
Cloud base (m)	450	2600	6350	7100	6250	5850	5700	5900	5600	2550	350	700	700	1600	550	450	400
km/h	SSE	SSE	SSE	SSE	SSE	ESE	SE	ESE	SE	SE	ESE	WNW	SW	SE	SE	SE	S
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	13	1	—	—	—	—	—	—	—	0.1	9	1.3	1.4	5	10	1	7
max °C	11	12	17	15	12	16	14	13	15	12	9	9	8	8	8	8	7
min °C	10	11	14	13	11	14	13	12	13	9	9	9	7	7	7	8	7
chill °C	8	10	14	12	11	14	12	11	10	8	8	9	6	6	4	6	6

Freezing level m	2700	3000	3100	3100	3000	2850	2800	2950	2750	2350	2000	1900	1700	1800	2050	2050	1650

	—	—	7:05	—	—	7:07	—	—	7:09	—	—	7:09	—	—	7:11	—	—
	4:36	—	—	4:35	—	—	4:34	—	—	4:31	—	—	4:30	—	—	4:30	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 14mm), heaviest on Tue afternoon. Very mild (max 17°C on Wed morning, min 10°C on Tue afternoon). Winds increasing (calm on Wed night, fresh winds from the SE by Fri morning).

Mount Si Weather (Days 3-6):

Heavy rain (total 37mm), heaviest during Sun morning. Very mild (max 12°C on Fri afternoon, min 7°C on Sat afternoon). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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 30 km WSW 160m alt. 1 hour ago	12°C	Dry	Calm (3 kph at 55).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Light rain .	Light winds from the ESE (17 kph at 110).	6 km Mid: few High: broken
Auburn 39 km SW 119m alt. 28 minutes ago	9°C	Dry	Calm (0 kph at 309).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4°C	Light rain .	Wind obs. (6 kph from 1 degs) was rejected.	1 km
SHIP3573 43 km W 3m alt. 3 hours ago	13°C		Light winds from the SSE (17 kph at 150).
SHIP3801 43 km W 15m alt. 1 hour ago			Light winds from the SSE (8 kph at 160).	- km
SHIP3247 43 km W 15m alt. 3 hours ago			Light winds from the SSE (15 kph at 150).	- km
SHIP4726 43 km W 15m alt. 2 hours ago			Light winds from the SSE (12 kph at 160).	- km
SHIP3318 43 km W 15m alt. 3 hours ago			Light winds from the SSE (17 kph at 150).	- km
SHIP9204 43 km W 15m alt. 3 hours ago			Light winds from the SSE (17 kph at 150).	- 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.