– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Wed 30 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Wed 30 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 19°C on Sat morning, min 11°C on Wed night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Warm (max 22°C on Sat afternoon, min 12°C on Mon night). Wind will be generally light.
	Wed 30		Thursday 1			Friday 2			Saturday 3			Sunday 4			Monday 5
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	some clouds	some clouds	clear	some clouds	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	5100	3250	2400	6900		1650	2550	8500	6800			9450			6900	8450	9650
km/h	NNW	SE	SSW	WSW	S	SW	W	E	ESE	N	ESE	SSW	WNW	E	NW	NW	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	15	12	15	18	14	17	18	15	19	22	17	21	22	17	18	19	14
min °C	14	11	12	17	12	12	18	13	14	21	15	15	21	14	14	18	12
chill °C	14	11	12	17	12	12	18	13	14	21	15	15	21	14	14	18	12

Freezing level m	3250	3350	3500	3500	3350	3150	3150	4050	4050	4050	4200	4150	4100	4050	3700	3650	4150

	—	—	7:05	—	—	7:05	—	—	7:07	—	—	7:09	—	—	7:09	—	—
	6:49	—	—	6:46	—	—	6:45	—	—	6:43	—	—	6:40	—	—	6:38	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Sat morning, min 11°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 22°C on Sat afternoon, min 12°C on Mon night). 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. 2 hours ago	17°C	Dry	Calm (0 kph at 35).
Renton Airport 36 km WSW 218m alt. 2 hours ago	18°C	Clear	Light winds from the NNW (15 kph at 330).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	18°C	Dry	Calm (0 kph at 197).
SHIP7822 43 km W 15m alt. 3 hours ago				- km
Monroe 44 km NW 80m alt. 1 hour ago	18°C	Dry	Calm (0 kph at 82).
SHIP3898 43 km W 15m alt. 3 hours ago				- km
Monroe 44 km NW 80m alt. 1 hour ago	18°C	Dry	Calm (0 kph at 82).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	17°C	Dry and partly cloudy.	Light winds from the N (11 kph at 1).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	18°C	-	Light winds from the NNW (11 kph at 340).	16 km Low: few Mid: few High: scattered
BUOY-EBSW1 46 km W 3m alt. 1 hour ago

* 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.